shinnslist

shinnslist · free beta

Free while in beta. Only the lien packs are sold.

shinnslist looks for off-market homes in the Colorado corridor from Estes Park to Longmont, using public county records. It is a beta. 9 of its 10 buyer personas are open, the rest are closed until their data is real, and the only checkout is for the lien sale packs at /liens/. Leave your email and the persona you work in, and we will tell you when it goes live.

We keep only your email, the persona and the page you used, to tell you when it goes live; never sold or shared. Remove it any time.

What is real today · as of October 19, 2026

9 personas open, 1 not yet.

An open persona is one query over recorded county facts whose top results were checked by hand against the county’s own records. It is not a prediction that anyone will sell.

Wholesaler open in beta

Owners whose tax bill goes to another address, who have held the place 10 years or more and paid less than half of what the county says it is worth now. Ranked by what led to profitable deals in Boulder County’s own sales records: a recent estate record on the title first, then heirs holding it, then 30 years or more held, with trouble on the county’s record (unpaid taxes, a foreclosure filing, a vacant or neglected home, an eviction, liens, heirs each owning a share) each adding once. Boulder County.

Records: Boulder County Assessor: where the tax bill is mailed, recorded sales and 2026 values.

Checked: Top 12 checked by hand against Boulder County’s own records on Oct 16, 2026: sale, value and mailing all match, 12 of 12.

See the Wholesaler list on the hunt

STR investor open in beta

Second homes in the mountain towns, Estes Park to Nederland and the Summit, Eagle and Grand County towns: the owner’s tax bill goes to another address. Homes on a named river, near a waterfall or next to national forest first (each a proven signal), then streams and canyons, then the longest-held.

Records: Larimer, Boulder, Summit, Eagle and Grand County assessors: where the tax bill is mailed (in Summit, Eagle and Grand, mail outside the home’s own town ZIP or out of state), and Boulder County’s recorded sales. Rivers and waterfalls: USGS National Hydrography Dataset. National forest: USDA Forest Service boundaries.

Checked: Top 10 checked by hand on Oct 16, 2026: the owner’s mail goes elsewhere per Larimer County, 10 of 10; no sale in the county’s seven-year record, 8 of 8; the Big Thompson River within 150 m, 6 of the 6 the USGS answered for. Ten Boulder County rows: mailing and value match, 10 of 10.

See the STR investor list on the hunt

Realtor open in beta

Homes held 10 years or more with a real life event or distress sign on the county’s record: the taxes are unpaid and the home is on Larimer County’s 2026 tax lien sale list (the treasurer publishes it before the November 19 sale; a Larimer home counts as long held when the county’s seven-year sales record shows no sale of its own), the owner of record is an estate (the owner has died and the estate holds the title, so the heirs or the estate’s representative decide what happens next), an estate record on the title in the last 3 years with no sale since (a death certificate or affidavit, or a personal representative’s deed passing the home to the heirs: of Boulder County homes with one a year ago, 13.5% sold within 12 months, against 4.0% of all homes), the county has confirmed a code violation there or is acting on one (zoning, building, weeds), or a building permit for a new house, an addition or a remodel has gone cold (open 18 months to 6 years, or expired). Newest county record first. Boulder County and the Estes Park end of Larimer County; in every county, the owner of record reads as an estate or its heirs in the county’s own owner name (ESTATE OF, DECEASED, HEIRS, PERSONAL REPRESENTATIVE), on a home held 10 years or more where the county says how long.

Records: Boulder County Assessor: the owner of record and every recorded document on the account, with its document type (its nightly public files; the codes read off the Clerk and Recorder’s index). Boulder County Land Use: its code-enforcement cases and building permits (public map layer; unincorporated land only). Larimer County Assessor: the owner of record and its last seven years of sales. Larimer County Treasurer: its 2026 tax lien sale list of delinquent real property (published before the sale, refreshed nightly).

Checked: Checked by hand on Oct 16, 2026 against the counties’ live records: the 22 estates (an estate is the owner of record, the purchase, the latest recorded document, 22 of 22 each), the 10 code cases (the case outline holds the home, its type, status and date, and the purchase, 10 of 10 each), 12 of the 68 stalled permits (the permit holds the home with its kind and month, and the purchase, 12 of 12 each), and 12 of the 383 estate records (on the county’s live sales layer the document is on the account that day without a price and nothing priced follows it, 12 of 12; 4 of them on the Clerk and Recorder’s index: 3 named as the card says, 1 death record indexed as a supplemental affidavit). The top 12 of the 67 homes on Larimer County’s tax lien sale list, Oct 16, 2026: on the list for the amount the card says, the county’s address, and no sale of its own in the county’s seven-year record, 12 of 12 each. The owner of record as an estate or its heirs in every county, Oct 18, 2026: 12 drawn in Jefferson, Weld, Broomfield and Adams read so on the state’s live parcel record (each county’s owner of record as sent to the state, March and April 2026), 12 of 12.

See the Realtor list on the hunt

Flipper open in beta

Single-family homes the county has not re-rated since they were built (1990 or before), with no remodel on its record, held 10 years or more, in neighborhoods where updated homes of a similar size sold for at least 30% more per square foot than this home’s county value, in sales the county qualified as arm’s-length. Widest gap first. Boulder County (its sales of the last two years, and its permits) and Adams County (the qualified sales of July 2022 to June 2024 the county set its values with, at its price for June 30, 2024).

Records: Boulder County Assessor: each building’s year built and effective year, permits, county values and the qualified sales of the last two years (its nightly public files). Adams County Assessor: year built, remodels and values (its data dumps) and its qualified residential sales list for the 2025 values.

Checked: Top 12 checked by hand on Oct 16, 2026 against Boulder County’s live records: year built, size, county value and purchase, 12 of 12; all 65 sales next door found with the same date and price, and the median recomputed from them, 12 of 12. Adams County, Oct 18, 2026, 12 drawn: land and total value on the county’s live value layer 12 of 12, the purchase on its live sales layer 12 of 12, year built and size on its live improvements layer 12 of 12, and the first five sales next door of each, 60 of 60, found as deeds on those dates. 3,266 Adams homes on Oct 18, 2026.

See the Flipper list on the hunt

Developer open in beta

Single-family lots where the county values the land at 70% or more of the whole, so the house adds little: teardown, rebuild and infill ground, with each lot’s size (and its zoning in Boulder County and Broomfield). Held 10 years or more. Most valuable land first. Boulder, Larimer, Weld, Adams, Jefferson, Broomfield and Eagle counties.

Records: The county assessor’s land and total values, the house and its deeds (each county’s own files: Boulder’s nightly files, Larimer’s public data center, Weld’s and Adams’s data downloads, Jefferson’s and Broomfield’s parcel layers, Eagle’s public extract). Zoning: Boulder County’s zoning districts map, read inside each lot’s outline; Broomfield’s own record.

Checked: Top 12 checked by hand on Oct 16, 2026 against Boulder County’s live records: land and house values, year built and size, lot acreage, the purchase, and the zone at the lot’s center, 12 of 12 each. Other counties, Oct 18, 2026: 12 drawn per county (all of them where fewer) against the county’s live record, land value, total value, year built and size: Weld 9 of 9, Adams 10 of 12 (2 a dollar apart), Jefferson 11 of 12 (one lot’s larger house is its second structure), Broomfield 1 of 1. Larimer’s and Eagle’s live records sit behind a disclaimer or a sign-in page, so they were not checked live.

See the Developer list on the hunt

Cash investor open in beta

A first cut at rent against price for a cash buy: homes the county values at $150,000 or more where a year of the census tract’s median rent comes to 8% to 15% of the county’s value. The rent is the area’s median for rented homes (for homes with the same number of bedrooms where Boulder County’s building file gives the count and the survey publishes one), from the Census Bureau’s American Community Survey 2020–2024: never this house’s rent, and each card says so. Above 15% the county value is seldom a market price (a deed-restricted home, a partial interest) or the area’s rent does not describe the home, so those are left out. Highest share first. Every county in the hunt with county values.

Records: U.S. Census Bureau: American Community Survey 2020–2024 5-year median gross rent by census tract (tables B25064 and B25031) and the 2020 tract outlines (TIGERweb); the county assessor’s value; Boulder County Assessor bedroom counts.

Checked: Top 12 checked by hand on Oct 16, 2026: the Census Bureau’s own geocoder puts each home’s point in the census tract on its card, and the rent on the card is that tract’s in the survey’s published table, 12 of 12. 13,367 homes on Oct 16, 2026.

See the Cash investor list on the hunt

Fix and rent open in beta

The Flipper door’s dated homes (not re-rated by the county since they were built, no remodel on its record, held 10 years or more, with updated homes of their size nearby selling for 30%+ more per square foot in sales the county qualified), ranked by how much of the county’s value a year of the census tract’s median rent comes to, for homes with the same number of bedrooms where the survey publishes it: fix, then rent at about the area’s median. The rent is the area’s median from the Census Bureau’s American Community Survey 2020–2024: never this house’s rent, and each card says so. Boulder and Adams counties, where the dated-home facts are.

Records: Boulder County Assessor: year built and effective year, permits, county values and the last two years’ qualified sales (its nightly public files). Adams County Assessor: year built, remodels, values and its qualified sales list for the 2025 values. U.S. Census Bureau: American Community Survey 2020–2024 median gross rent by census tract and bedrooms, and the 2020 tract outlines.

Checked: Top 12 checked by hand on Oct 16, 2026: the Census Bureau’s own geocoder puts each home’s point in the census tract on its card, and the rent on the card is that tract’s in the survey’s published table, 12 of 12 (the dated-home facts as checked for the Flipper door). 1,025 homes on Oct 16, 2026.

See the Fix and rent list on the hunt

Land open in beta

Vacant residential land in Boulder, Larimer, Weld, Broomfield, Summit and Eagle counties: the county’s record shows the land with no house on it (Boulder County also lists its no-value residential land, vacant lots and patented mining claims; Larimer County its town land with no building; Summit and Eagle counties by the state’s vacant land classes: residential lots, planned-unit lots and acreage). Biggest first, with the county’s acreage and value. Government, minerals-only, commercial and industrial land, and land the county marks non-buildable, stay out. Lots last bought in one sale of 3 or more lots, a builder’s or developer’s inventory, are hidden behind their own count: tick it to see them. Utilities and zoning come next.

Records: Each county assessor’s record as the hunt stores it: the land class (Summit and Eagle: the assessment code each county sends the state’s parcel composite), the acreage (Larimer does not send it) and the county’s value.

Checked: Top 12 checked by hand on Oct 16, 2026: the 8 Weld lots against the state’s public parcel composite (acreage, value and “Vacant Land”), 8 of 8; the 4 Boulder lots against Boulder County’s live assessor record (no building, the same land value and acreage), 4 of 4.

See the Land list on the hunt

Family compound open in beta

Every lot in the nine counties with room for a second household without building new: two homes on one lot, a duplex, triplex or fourplex, a second building of 400 sq ft or more on the aerial (a garage, barn or shop to turn into a unit, recorded or not), a walk-out basement with its own door, or a big house to split. Camps and compounds too: a camp or retreat, a campground with cabins, a lodge or bed and breakfast, or lodging with three or more buildings on five acres or more, from the county’s own class. Each card says how the second unit gets its own door.

Records: Aerial building outlines on every lot (Overture Maps: machine-traced from imagery, with OpenStreetMap; ODbL), placed in the state’s lot outlines (Colorado Public Parcels, OIT GIS); each county’s unit classes; Boulder County’s buildings file (garages, barns, walk-out basements, finished square feet).

Checked: Checked Oct 17, 2026 against Boulder County’s buildings file: 86% of the aerial’s second buildings on home lots (9,010 of 10,458) are on the county’s record as a garage or another building; the other 14% are buildings the record doesn’t list. The aerial finds 67% of the county’s detached garages of 400+ sq ft; the rest come from the record itself.

See the Family compound list on the hunt

No money down not open yet

Still needs the recorded loan on each property: the market’s rate the month each home last sold is on file in both states, not the loan’s own rate, and whether a loan is assumable is not in the public record.

The signals

263 of 314 signals proven so far.

A signal is proven when an acceptance test against its live public source passes, with precision and recall recorded and dated. The rest are built, half-built or planned; the truth table lists every one.

  • Best Value Number: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales, buildings, values and appraisal neighborhoods (the adapter from the public map services; the label from the nightly Sales.csv qualified sales, Buildings.csv, Values.csv and the parcel layer's NbhdCode read whole) and the City of Boulder's declared costs for single-family alterations.
  • Rent Potential Calculator: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against HUD Small Area Fair Market Rents and the Boulder MSA Fair Market Rents (HUD map services), Census ZIP areas (TIGERweb) and the county's nightly Buildings.csv.
  • Hidden Water Feature: proven October 16, 2026 on 18 test cases (12 in the corridor, 6 elsewhere in Colorado), precision 1.00, recall 1.00, against USGS NHD waterbodies, flowlines and points, and the USFWS National Wetlands Inventory (public ArcGIS, no key).
  • Water Rights Well: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS NWIS site service, groundwater sites (public, no key).
  • Census Flip Tract: proven October 16, 2026 on 24 test cases (1 in the corridor, 9 elsewhere in Colorado, 8 in Virginia, 6 elsewhere in the U.S.), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 5-year summary files 2021 and 2024 (www2.census.gov, no key).
  • Micro Trend Radar: proven October 16, 2026 on 19 test cases (19 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and buildings (the adapter from the public map services, the label from the county's nightly public files).
  • Boom Town Follower: proven October 18, 2026 on 17 test cases (17 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau Vintage 2024 county population estimates, co-est2024-alldata.csv (www2.census.gov, no key).
  • Income Stack Score: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Six side-income layers, each the label of a signal that passed acceptance.
  • Cost To Activate Gap: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor nightly Buildings.csv.
  • Best Fit Buyer: proven October 18, 2026 on 26 test cases (26 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor nightly files (owners classed estate or business, values, sales), the stalled_permit_distress, code_violation_x_tall_grass and Acreage labels (county permits, code cases and parcels; public, no key).
  • Keep One Wall Tax: proven October 18, 2026 on 24 test cases (12 in the corridor, 12 in Virginia), precision 1.00, recall 1.00, against Va. Code 58.1-3220 and the ordinances of Chesterfield County, Henrico County and Harrisonburg (official pages, read 2026-10-18); Colorado law (no such exemption).
  • House Hack Fit: proven October 18, 2026 on 24 test cases (8 in the corridor, 16 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B25064 (median gross rent), per tract and county (www2.census.gov, no key).
  • Per Parcel Real Costs: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor, estimated taxes by taxing authority (public ArcGIS, no key).
  • On Market Deal Score: proven October 18, 2026 on 37 test cases (37 in the corridor), precision 1.00, recall 1.00, against Zillow alerts in the shinnslist inbox matched to county parcels; the parcel's county actual value (parcel store) rolled with the FHFA House Price Index (fhfa.gov) and comparable recorded sales (parcel store).
  • Whole Region Rank: proven October 16, 2026 on 24 test cases (24 in Virginia), precision 1.00, recall 1.00, against VGIN statewide parcels (Virginia, public ArcGIS, no key).
  • Zoning Arbitrage: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Corridor zoning maps in Boulder County, county parcels and the nightly Buildings.csv.
  • Mislisted Sqft: proven October 18, 2026 on 117 test cases (117 in the corridor), precision 1.00, recall 1.00, against listings inbox card facts against Boulder CAMA, Larimer Assessor Public Data Center and Jefferson jMap building records (public, no key).
  • Improvement Zone Between Hnw: proven October 18, 2026 on 24 test cases (13 in the corridor, 11 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B19013 (median household income), per tract and county (www2.census.gov, no key).
  • No Airbnb License Acreage: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County short-term and vacation rental license register, assessor parcels and zoning map (public map services, no key).
  • Sprinter Van Summer Camp: proven October 16, 2026 on 24 test cases (11 in the corridor, 13 in Virginia), precision 1.00, recall 1.00, against USDA Forest Service recreation opportunities and The National Map campgrounds (public map services, no key).
  • Mixed Zoning Live Work: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Corridor zoning maps and the towns' and counties' use tables.
  • Alphaearth Core: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against AlphaEarth Foundations annual satellite embeddings (Google and Google DeepMind; public copy on Source Cooperative, CC-BY 4.0), 2017 against 2025 at the parcel point's 10 m pixel, Boulder County corridor parcels.
  • Code Violation X Tall Grass: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Land Use, code enforcement cases (Accela, public ArcGIS layer, no key).
  • Tax Delinquency Early Warning Formula: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Larimer County Treasurer, 2026 tax lien sale list (shinnslist's stored copy) and the Assessor's tax parcel layer.
  • Auction Underbidder Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Life Event Distress: proven October 18, 2026 on 18 test cases (1 in the corridor, 17 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B23025 (employment status), per county (www2.census.gov, no key).
  • Foreclosure Surplus Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and values files (nightly CSVs, no key).
  • Unpermitted To Sweat Equity: proven October 18, 2026 on 23 test cases (12 elsewhere in Colorado, 1 in Virginia, 10 elsewhere in the U.S.), precision 1.00, recall 0.91, against Socrata Open Data catalog API (api.us.socrata.com/api/catalog/v1, no key).
  • Tax Delinquency Early Warning: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Larimer County Treasurer's 2026 tax lien sale advertising list of delinquent real property (public Excel file, refreshed nightly until the 2026-11-19 sale), joined through Larimer County's tax parcels layer.
  • OpenFEMA Flood Buyout: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against FEMA National Flood Hazard Layer, flood hazard zones (public ArcGIS, no key).
  • Burn Scar / Fire Channel: proven October 16, 2026 on 24 test cases (12 in the corridor, 2 elsewhere in Colorado, 10 elsewhere in the U.S.), precision 1.00, recall 1.00, against NIFC WFIGS Interagency Perimeters Current (public ArcGIS, no key).
  • AMI Smart Meter Vacancy: proven October 18, 2026 on 20 test cases (8 in the corridor, 12 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary files, tables B25002 (occupancy status) and B25004 (vacancy status), per tract (www2.census.gov, no key).
  • Water X Distress Matrix: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against FEMA National Flood Hazard Layer, flood hazard zones (public ArcGIS, no key) crossed with Larimer County Treasurer's 2026 tax lien sale list (shinnslist's stored copy) through Larimer County's tax parcel layer.
  • Foreclosure Nod Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales file (every recorded document per account; nightly CSV, no key).
  • Probate Preprobate X Parcel: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor, parcel owners map layer (public ArcGIS, no key).
  • Absentee Entity High Equity: proven October 16, 2026 on 48 test cases (48 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor's parcel owners, sales and values map layers, and Larimer County's tax parcels layer with its Assessor's public value and sales files (public, no key).
  • Estate Sales: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales file (nightly CSV, no key).
  • Dumpster Out Front: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against City of Boulder Construction Permits (city open data).
  • Unkept Property: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 0.92, against USDA NAIP 4-band imagery (Microsoft Planetary Computer.
  • Retirement Home Visitors: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against CMS Care Compare nursing homes (Provider Information, data.cms.gov).
  • Fb Marketplace Downsizing: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor (accounts, buildings, sales; public map services).
  • Three Percent Mortgage Buyers List: proven October 18, 2026 on 24 test cases (24 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B25081 (mortgage status), per county and the nation (www2.census.gov, no key).
  • Confidence Percent: proven October 18, 2026 on 10 test cases (10 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up hunt rows scored by the confidence engine (lib/confidence-score.mjs) against its frozen tier counts (lib/confidence-tiers.json, snapshot 2026-10-16).
  • Add Dataset Extensible: proven October 18, 2026 on 12 test cases (12 elsewhere in the U.S.), precision 1.00, recall 1.00, against own data.
  • Wrong Path Killswitch: proven October 18, 2026 on 8 test cases (8 elsewhere in the U.S.), precision 1.00, recall 1.00, against own code.
  • Assumable / Seller Finance Flag: proven October 18, 2026 on 24 test cases (2 in the corridor, 22 elsewhere in Colorado), precision 1.00, recall 1.00, against CFPB / FFIEC HMDA Data Browser API, /view/aggregations, 2020-2022 home-purchase loan application records per county (ffiec.cfpb.gov, public domain, no key).
  • Rent Back Timeshare: proven October 18, 2026 on 48 test cases (48 in the corridor), precision 1.00, recall 1.00, against Summit, Routt and Archuleta County Assessors' own parcel records (the three Colorado counties whose free record classes timeshare units).
  • STR Attached Home Premium: proven October 18, 2026 on 40 test cases (40 in the corridor), precision 1.00, recall 1.00, against STR license registers (City of Boulder, Boulder/Summit/Larimer/Clear Creek counties, Town of Avon; public map services, no key), county assessor building records, ACS 2020-2024 B25024 summary file, TIGERweb places.
  • Dscr Projected Income List: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against HUD small-area rents, the county's nightly Buildings.csv and Values.csv, its tax table, and Freddie Mac's weekly 30-year average.
  • Middle Man Lending: proven October 18, 2026 on 20 test cases (1 in the corridor, 19 elsewhere in Colorado), precision 1.00, recall 1.00, against CFPB / FFIEC HMDA Data Browser API, /view/aggregations (ffiec.cfpb.gov, no key).
  • Lead At Close Commission: proven October 18, 2026 on 10 test cases (10 elsewhere in the U.S.), precision 1.00, recall 1.00, against checkout attempts against the real handler with a recorded (never reached) Stripe endpoint.
  • Unique Home Lender Match: proven October 18, 2026 on 24 test cases (1 in the corridor, 23 elsewhere in Colorado), precision 1.00, recall 1.00, against CFPB / FFIEC HMDA Data Browser API, /view/aggregations (ffiec.cfpb.gov, no key).
  • Unique Home Insurance Match: proven October 18, 2026 on 24 test cases (2 in the corridor, 22 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B25032 (tenure by units in structure), per county (www2.census.gov, no key).
  • Paperwork Sherpa: proven October 18, 2026 on 11 test cases (11 elsewhere in the U.S.), precision 1.00, recall 1.00, against the library’s Commission form families and version checks recorded through the real handler (made-up checks for the test).
  • Project 100 Zip Leads: proven October 18, 2026 on 24 test cases (24 elsewhere in Colorado), precision 1.00, recall 1.00, against CFPB / FFIEC HMDA Data Browser API, /view/filers per county (ffiec.cfpb.gov, no key).
  • Ispeedtolead Clone Shape: proven October 18, 2026 on 15 test cases (15 elsewhere in the U.S.), precision 1.00, recall 1.00, against own data.
  • Land Renewable Lease Loan: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against EIA U.S. Energy Atlas Electric Substations (ArcGIS FeatureServer, public, no key), read in bulk by 0.1-degree tile.
  • Wholetail Private Master: proven October 18, 2026 on 13 test cases (13 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up parcels worked on the deal sheet (lib/deal-sheet.js applyDeal.
  • Off Market Business Inventory: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Colorado Secretary of State business entities (data.colorado.gov), Boulder County assessor parcels and sales.
  • Live Stream Whats Working: proven October 18, 2026 on 8 test cases (8 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up truth-table rows, and the committed truth table for two real signals.
  • User Friendly Wholesale App: proven October 18, 2026 on 7 test cases (7 elsewhere in the U.S.), precision 1.00, recall 1.00, against one made-up Boulder parcel per case in a fresh database.
  • Pay Per Lead List: proven October 18, 2026 on 11 test cases (11 elsewhere in the U.S.), precision 1.00, recall 1.00, against checkout attempts against the real handler with a recorded (never reached) Stripe endpoint.
  • Model Access Tokens: proven October 18, 2026 on 11 test cases (11 elsewhere in the U.S.), precision 1.00, recall 1.00, against own data.
  • Jmu Compound Hunt: proven October 18, 2026 on 10 test cases (10 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up Virginia and Colorado parcels with stored outline acres, water kinds and proven tags.
  • Dream Inventory Camps: proven October 18, 2026 on 9 test cases (9 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up Colorado and Virginia parcels with stored compound kinds (camp), water kinds and proven tags.
  • Auto Dossiers: proven October 18, 2026 on 18 test cases (18 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up test parcels in a fresh database.
  • Outreach Prep Deal Desk: proven October 18, 2026 on 12 test cases (12 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up parcels with test owners and mailing addresses, suppressions (migration 0011) and owner removals.
  • Space To Earth Zoom: proven October 18, 2026 on 9 test cases (9 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up parcels at real corridor and non-corridor points in a fresh database; assets/places.json for the town names.
  • Epic Viz Target Mix: proven October 18, 2026 on 8 test cases (8 elsewhere in the U.S.), precision 1.00, recall 1.00, against six made-up Colorado parcels in a fresh database.
  • Click Pick 50Plus Lists: proven October 18, 2026 on 114 test cases (114 elsewhere in the U.S.), precision 1.00, recall 1.00, against own data.
  • Watch Mode Alerts: proven October 18, 2026 on 20 test cases (20 elsewhere in the U.S.), precision 1.00, recall 1.00, against own data.
  • MAP Color By Edge: proven October 18, 2026 on 7 test cases (7 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up frozen scores in the hunt-scores.json shape ({ parcels.
  • Freshness Repull: proven October 18, 2026 on 7 test cases (7 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up registry entries, a stub count service (the live path is the curl count query).
  • Public Prediction Ledger: proven October 18, 2026 on 6 test cases (6 elsewhere in the U.S.), precision 1.00, recall 1.00, against tests/fixtures/confidence-universe-tiny.ndjson (ten made-up parcels).
  • Verified Lead Ledger: proven October 18, 2026 on 6 test cases (6 elsewhere in the U.S.), precision 1.00, recall 1.00, against tests/fixtures/confidence-universe-tiny.ndjson frozen on 2026-01-02, one made-up listing per case.
  • Interactive Deal Room: proven October 18, 2026 on 10 test cases (10 elsewhere in the U.S.), precision 1.00, recall 1.00, against two made-up parcels and a stored check in a fresh database; a made-up owner password that exists only in the run.
  • Github Opensource Signal Mine: proven October 18, 2026 on 6 test cases (6 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up search answers in GitHub's shape; the live run of 2026-10-18 is data/signal-proposals/github-2026-10-18.json.
  • Reso MLS Tailwind: proven October 18, 2026 on 7 test cases (7 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up alert emails in Zillow's card shape.
  • Proprietary Models Outputs Only: proven October 18, 2026 on 10 test cases (10 elsewhere in the U.S.), precision 1.00, recall 1.00, against two made-up parcels in a fresh database; the engine's own freeze summary and weights table as the known-internal controls.
  • Signal Gating Ledger: proven October 18, 2026 on 18 test cases (18 elsewhere in the U.S.), precision 1.00, recall 1.00, against the committed signal truth table and the agent catalog that reads it.
  • Cabin: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 0.92, against Boulder County Assessor appraisal records (public map services, no key).
  • Farm: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USDA NRCS SSURGO through Soil Data Access (public, no key).
  • Off Grid: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County onsite wastewater (septic) system records (public ArcGIS, no key).
  • Prepped: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Colorado DWR well permits and USFS wildfire hazard (their proven signals' labels) and FEMA's flood hazard zones (NFHL).
  • Horse / Equestrian: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (public map services, no key).
  • Waterfall: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS NHD points, FCode 48700 waterfall (public ArcGIS, no key).
  • River Frontage, Rights & Flood Risk: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS NHD large-scale flowlines (public ArcGIS, no key).
  • Greenhouse / Attached Greenhouse Houses: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (public map services, no key).
  • Acreage: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 0.92, against Boulder County Assessor parcel records (public map service, no key).
  • Hunting: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS PAD-US public access layer (fee land, open access), ArcGIS REST, no key.
  • Ranching: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USDA NRCS SSURGO through Soil Data Access (public, no key).
  • Old American Mansions / Architectural Styles: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (public map services, no key).
  • Investor Specials: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County code cases and permits (builder 1's proven labels) and the Assessor's nightly Values.csv, Buildings.csv and Sales.csv.
  • Barndominiums: proven October 16, 2026 on 13 test cases (13 in the corridor), precision 1.00, recall 1.00, against Boulder County land-use and building records (Accela) and zoning map (public map services, no key).
  • Cities In Other Countries + Translation: proven October 18, 2026 on 7 test cases (7 elsewhere in the U.S.), precision 1.00, recall 1.00, against HM Land Registry Price Paid Data (City of London, 2026 sales; excerpt in tests/fixtures/intl-ppd-city-of-london.csv) and INSPIRE Index Polygons (City of London), Open Government Licence; postcode centres from postcodes.io (ONS, OGL).
  • Paranormal Listings In Areas With History: proven October 16, 2026 on 24 test cases (3 in the corridor, 21 in Virginia), precision 1.00, recall 1.00, against NPS National Register of Historic Places, USGS The National Map (cemeteries, historic sites, GNIS historical places) and Boulder County historic sites (public map services, no key).
  • Bigfoot Listings: proven October 16, 2026 on 24 test cases (1 in the corridor, 23 elsewhere in Colorado), precision 1.00, recall 1.00, against Bigfoot Field Researchers Organization county report pages (bfro.net) and Census TIGERweb counties.
  • Earthships: proven October 16, 2026 on 16 test cases (16 in the corridor), precision 1.00, recall 1.00, against Boulder County land-use and building records (Accela) and zoning map (public map services, no key).
  • Hobbit Homes: proven October 16, 2026 on 15 test cases (15 in the corridor), precision 1.00, recall 1.00, against Boulder County land-use and building records (Accela) and zoning map (public map services, no key).
  • Recording Studios: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County land-use and building records (Accela) and zoning map (public map services, no key).
  • Up-And-Coming Vacation Properties: proven October 18, 2026 on 21 test cases (21 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B07001 (geographical mobility in the past year), per county and the nation (www2.census.gov, no key).
  • Interior Design Styles: proven October 18, 2026 on 123 test cases (123 in the corridor), precision 1.00, recall 1.00, against listings inbox card facts against Boulder CAMA, Larimer Assessor Public Data Center and Jefferson jMap building records (public, no key) (the building architectural style in the record, not interior photos).
  • Multi Source Re Aggregator: proven October 18, 2026 on 5 test cases (5 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up parcels and stored check answers in a fresh database.
  • Rental Apartment Junk Filter: proven October 16, 2026 on 24 test cases (4 in the corridor, 6 elsewhere in Colorado, 14 in Virginia), precision 1.00, recall 1.00, against HUD Multifamily Properties - Assisted (public ArcGIS, no key).
  • Click Pick List Builder Api: proven October 18, 2026 on 17 test cases (17 elsewhere in the U.S.), precision 1.00, recall 1.00, against own data.
  • STR Analysis Site Pattern: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against City of Boulder rental licenses (short-term, Issued) and Boulder County's short-term and vacation rental register (active records).
  • House For Equity Swap Listings: proven October 18, 2026 on 10 test cases (10 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up sign-ups (example.test addresses) on a fresh board.
  • Public Land Access Verify: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USDA Forest Service National Forest boundaries and BLM surface-management layer (public ArcGIS, no key).
  • Self Healing Scraper Mcp: proven October 18, 2026 on 6 test cases (6 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up registry entry and recorded fallbacks, a stub count service.
  • Openclaw Wrapper Mrr Pattern: proven October 18, 2026 on 7 test cases (7 elsewhere in the U.S.), precision 1.00, recall 1.00, against one made-up parcel in a fresh database; the committed llms.txt. Listing the connection in agent directories waits on James and is not done here..
  • Vacant Nod Zombie: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Code Lien Foreclosure: proven October 18, 2026 on 16 test cases (16 in the corridor), precision 1.00, recall 1.00, against Boulder County Land Use cases (Accela layer, read whole) and the Assessor sales file.
  • Early Change Motivation Score: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Four signals proven on corridor parcels, read live by the composite.
  • Fresh Verified Distress Stack: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against The same proven distress legs, each dated by what it read (the Boulder files' CreatedDate, the Larimer files' RUNDATE, the stored tax list's as-of date, live layers today).
  • Parcel Buildability Score: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USDA NRCS soil survey through Soil Data Access (the 'Dwellings without basements' rating of the soil component covering most of the map unit under the point) and FEMA's flood hazard zones (public, no key).
  • Stalled Permit Distress: proven October 16, 2026 on 48 test cases (48 in the corridor), precision 1.00, recall 1.00, against Boulder County building permits (Accela, public ArcGIS layer, no key) and the City of Boulder construction permits (public ArcGIS layer, no key).
  • Heir Property Fractional: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Fire Casualty Permit: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County fire-casualty records (Accela Four Mile Fire and Marshall Fire records; the Marshall Fire parcel layer; public ArcGIS, no key).
  • Investor Concentration Index: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor's parcel owners layer (public ArcGIS, no key).
  • Vacant Land Owner Distress Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Holder Mix Map: proven October 18, 2026 on 24 test cases (11 in the corridor, 13 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B25003 (tenure), per tract and county (www2.census.gov, no key).
  • Property Condition Risk Score: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor nightly building file (Buildings.csv).
  • Listing Truth Gap: proven October 18, 2026 on 117 test cases (117 in the corridor), precision 1.00, recall 1.00, against listings inbox card facts against Boulder CAMA, Larimer Assessor Public Data Center and Jefferson jMap building records (public, no key).
  • Institutional Owner Entity Resolution: proven October 18, 2026 on 38 test cases (38 elsewhere in the U.S.), precision 1.00, recall 1.00, against SEC EDGAR company search (www.sec.gov/cgi-bin/browse-edgar, action=getcompany, no key).
  • Tenant Turnover Maintenance Risk: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 5-year table B25038 (Census Reporter, every tract of Boulder and Larimer counties) and Census 2020 tracts (TIGERweb Tracts_Blocks).
  • Hoa Superpriority Lien: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Commercial Listing Staleness Score: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Colorado Secretary of State business entities (data.colorado.gov) and Boulder County assessor parcels.
  • Gold Stream Prospecting: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS Mineral Resources Data System (MRDS) WFS, layer mrds-high (public, no key).
  • Waterfall Build Site: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS NHD points, FCode 48700 waterfall (public ArcGIS, no key).
  • List Saturation Index: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against shinnslist listings inbox (Zillow saved-search alerts to [email protected], read-only).
  • Seller Trust Score: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales file (nightly CSV, no key).
  • Rehab Cost Estimator: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor nightly Buildings.csv and Values.csv and the City of Boulder's declared costs for single-family alterations.
  • Data Center Land Siting: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against HIFLD electric substations (public ArcGIS mirror, no key).
  • Wildfire Insurance Mitigation: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County wildfire zones under its building code (Section R390.2, adopted July 1, 2026; public ArcGIS, no key).
  • Derelict Utilities Knockdown: proven October 18, 2026 on 24 test cases (7 in the corridor, 17 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary files, tables B25004 (vacancy status, line 8 "other vacant") and B25002 (occupancy status, line 1 total housing units), per tract (www2.census.gov, no key).
  • Seasonal Water Temporal: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS NHD large-scale flowlines (public ArcGIS, no key).
  • Water Diversion Pond Feasibility: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS National Hydrography Dataset, large scale (hydro.nationalmap.gov, public, no key).
  • Camp Lodge Cabin Conversion: proven October 16, 2026 on 24 test cases (16 in the corridor, 8 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (tourism=camp_site, chalet, alpine_hut; leisure=resort) via Photon category search and Nominatim outlines (no key; © OpenStreetMap contributors, ODbL).
  • Bedroom Add Arbitrage: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales, buildings and appraisal neighborhoods (the adapter from the public map services with warranty deeds standing in; the label from the nightly Sales.csv sales the Assessor qualified, Buildings.csv, and the parcel layer's NbhdCode read whole).
  • Lot Split Subdivision Potential: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Corridor zoning maps (Boulder County and its towns, Estes Park, Larimer County, Erie) and county parcels.
  • Adu Duplex Eligibility: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Corridor zoning maps, county parcels, Boulder County's nightly Buildings.csv, FEMA flood zones, the towns' and counties' codes and Colorado HB24-1152.
  • STR Lease Arbitrage Absentee: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County parcel owners, zoning, parcels, buildings and short-term and vacation rental licenses (public ArcGIS, no key) and the Census county subdivisions, under Boulder County Ordinance 2023-02.
  • Military Assumable Loan: proven October 18, 2026 on 24 test cases (12 in the corridor, 12 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. DoD installation boundaries (FY2024 MIRTA), USDOT/BTS NTAD Military Bases FeatureServer (public, no key), read in bulk by 0.1-degree tile.
  • Hyperlocal Catalyst Monitor: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County land-use docket and building permits (Accela) and zoning map (public map services, no key).
  • Distress Stack Conviction Score: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against The corridor's proven distress signals (Boulder County.
  • Offmarket Probability Engine: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against The proven distress legs and the county's last sale of $10,000 or more against today's value (Boulder Sales.csv and Values.csv; Larimer sales and value detail files).
  • Assumable Equity Arbitrage: proven October 18, 2026 on 24 test cases (2 in the corridor, 22 elsewhere in Colorado), precision 1.00, recall 1.00, against CFPB / FFIEC HMDA Data Browser API, /view/aggregations, 2020-2022 home-purchase loan application records per county (ffiec.cfpb.gov, public domain, no key).
  • Teardown Option Value: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor, land and building values (public ArcGIS, no key).
  • Water Value Stack: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS National Hydrography Dataset, large scale (hydro.nationalmap.gov, public, no key).
  • STR Regulatory Arbitrage Map: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Corridor STR ordinances (Boulder, Lyons, Longmont, Lafayette; Boulder County Ordinance 2023-02), Boulder County zoning and short-term and vacation rental licenses, Census county divisions, and the hunt's STR investor towns.
  • Insurance Mitigation Value: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against FEMA National Flood Hazard Layer, flood hazard zones (public ArcGIS, no key).
  • Lien Stack Priority: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales file and Land Use cases.
  • Heir Fractional Assemblage: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor owner file (nightly CSV, no key).
  • Catalyst Front Run: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County land-use docket (Accela) and zoning map (public map services, no key).
  • Bedroom Adu Value Uplift: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against The bedroom_add_arbitrage label (Boulder County nightly sales and buildings) and the adu_duplex_eligibility label (corridor zoning maps, county parcels and buildings, FEMA flood zones, the codes).
  • Adverse Possession Ripening Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Motel OPM Guaranteed Occupancy: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor nightly Buildings.csv (class 2215 buildings designed as hotels, lodging or inns) joined to Account_Parcels.csv.
  • Grant Stacked Land Yield: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS PAD-US 4.1 easements managed by NRCS, Census TIGERweb counties and USAspending.gov county obligations for EQIP, ACEP, CRP and CSP (public, no key).
  • Absentee STR Conversion Funnel: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor owner and sales files (nightly CSVs, no key).
  • Tired Landlord Composite: proven October 16, 2026 on 48 test cases (48 in the corridor), precision 1.00, recall 1.00, against Boulder County parcel owners and sales and its code cases and permits (Accela), and Larimer County's tax parcels layer, its Assessor's public sales file and its Treasurer's tax lien sale list, public, no key.
  • Squatter Occupancy Signal: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder Police Department offenses (City of Boulder open data).
  • Tired Landlord to Seller: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against City of Boulder Rental Housing Licenses (city open data) and Boulder County assessor sales.
  • Geotagged Photo Distress Mine: proven October 18, 2026 on 24 test cases (16 in the corridor, 8 elsewhere in Colorado), precision 1.00, recall 1.00, against Wikimedia Commons category tree.
  • Neglect Imagery Timeseries: proven October 18, 2026 on 22 test cases (22 in the corridor), precision 1.00, recall 0.90, against USDA NAIP 4-band imagery (Microsoft Planetary Computer.
  • Yard To Storage Conversion: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor land and values files (nightly CSVs, no key).
  • Assumable Pool Network: proven October 18, 2026 on 11 test cases (11 elsewhere in the U.S.), precision 1.00, recall 1.00, against made-up parcels and one test buyer sign-up (counties Adams, Weld, Boulder; up to $500,000); FHA/VA shares from the stored HMDA copy (2026-10-16).
  • Search Intent Distress Trend: proven October 16, 2026 on 24 test cases (13 in the corridor, 11 elsewhere in Colorado), precision 1.00, recall 1.00, against CFPB Consumer Complaint Database (search API).
  • Mechanic Lien Distress: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Land Use cases (Accela layer, read whole).
  • Parcel Insurance Cost Insurability: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against FEMA NFHL flood hazard zones (public ArcGIS) and USDA Forest Service Wildfire Hazard Potential 2023, classified (federal GeoPlatform image service), both no key.
  • Deed Fraud Watch: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Marketing Compliance Risk: proven October 18, 2026 on 22 test cases (1 elsewhere in Colorado, 1 in Virginia, 20 elsewhere in the U.S.), precision 1.00, recall 1.00, against FCC Consumer Complaints Data, Unwanted Calls (opendata.fcc.gov Socrata vakf-fz8e, no key), complaints by state over the trailing 12 months; Census Bureau Vintage 2024 state population estimates (NST-EST2024-ALLDATA, www2.census.gov).
  • Appraisal Gap Risk: proven October 18, 2026 on 40 test cases (40 in the corridor), precision 1.00, recall 1.00, against Zillow alerts in the shinnslist inbox matched to county parcels; the highest of the county actual value (parcel store) rolled with the FHFA House Price Index and the comparable-sales estimate (parcel store).
  • Post Purchase Tax Reassessment: proven October 18, 2026 on 40 test cases (40 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales, values and owner files (nightly CSVs, no key).
  • Self Storage Retiring Owner: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor buildings and sales files (nightly CSVs, no key).
  • Commercial Distress Vacancy Signal: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Colorado Secretary of State business entities (data.colorado.gov) and Boulder County assessor parcels.
  • Rent Control Regulatory Risk: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Colorado C.R.S. 38-12-301 (rent control preempted) and the corridor's long-term rental licensing ordinances (City of Boulder, Denver, Fort Collins; Boulder County licenses none), placed with Boulder County's zoning map, Larimer County's parcel layer and the parcel's county.
  • Insurance Claim Denial: proven October 16, 2026 on 22 test cases (4 in the corridor, 5 elsewhere in Colorado, 13 in Virginia), precision 1.00, recall 1.00, against OpenFEMA NFIP redacted claims v3 and the Census geocoder (federal, no key).
  • Rent Payment Reliability: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against HUD Multifamily Assisted Properties (HUD map service).
  • Eviction Timeline Risk: proven October 18, 2026 on 24 test cases (8 in the corridor, 16 elsewhere in Colorado), precision 1.00, recall 1.00, against U.S. Census Bureau ACS 2020-2024 5-year summary file, table B25071 (median gross rent as a percentage of household income), per tract (www2.census.gov, no key).
  • Damage Protection Gap: proven October 18, 2026 on 24 test cases (21 in the corridor, 3 elsewhere in Colorado), precision 1.00, recall 1.00, against FEMA NFHL flood hazard zones (public ArcGIS), Census TIGERweb tracts and OpenFEMA NFIP Redacted Policies v3, all public and no key.
  • Platform Support Failure: proven October 16, 2026 on 23 test cases (14 in the corridor, 9 elsewhere in Colorado), precision 1.00, recall 1.00, against CFPB Consumer Complaint Database (search API).
  • Well Depth Drill Cost: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against USGS NWIS site service, groundwater sites with a reported depth (public, no key).
  • Ai Title Abstract: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales file (nightly CSV, no key).
  • Condo Assessment Distress Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales and owner files (nightly CSVs, no key).
  • Mineral Royalty Suspense Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales file (nightly CSV, no key).
  • Agent Query Demand Join: proven October 18, 2026 on 16 test cases (16 elsewhere in the U.S.), precision 1.00, recall 1.00, against own data.
  • Aggregate Reserve Distress Join: proven October 16, 2026 on 24 test cases (12 in the corridor, 12 in Virginia), precision 1.00, recall 1.00, against USGS Mineral Resources Data System (WFS mrds-high, no key).
  • Air Rights Sending Site Join: proven October 18, 2026 on 24 test cases (22 in the corridor, 2 elsewhere in Colorado), precision 1.00, recall 1.00, against NPS National Register of Historic Places locations (points and boundaries, public domain).
  • Airport Noise Contour Join: proven October 16, 2026 on 24 test cases (24 in Virginia), precision 1.00, recall 1.00, against FAA airport master records (5010) via BTS NTAD Aviation Facilities (public ArcGIS, no key).
  • Assumable Mortgage Under 4pct: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor sales (the adapter from the public map service, the label from the nightly Sales.csv) and Freddie Mac's Primary Mortgage Market Survey.
  • Bank Branch Closure Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 18 in Virginia), precision 1.00, recall 1.00, against FDIC BankFind institution history, branch closings (change code 721; public API, no key).
  • BEAD Site Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 18 elsewhere in Colorado), precision 1.00, recall 1.00, against Colorado Broadband Office BEAD final proposal locations and USGS 3DEP elevation (public, no key).
  • BESS Site Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 19 in Virginia), precision 1.00, recall 1.00, against HIFLD electric substations (public copy on ArcGIS Online, no key).
  • Billboard Frontage Screen Join: proven October 16, 2026 on 24 test cases (4 in the corridor, 20 in Virginia), precision 1.00, recall 1.00, against FHWA National Highway System with AADT and FHWA National Scenic Byways via NTAD (public ArcGIS, no key).
  • Bowling Alley Distress Join: proven October 16, 2026 on 24 test cases (10 elsewhere in Colorado, 14 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (leisure.
  • Brightfield Solar Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 18 in Virginia), precision 1.00, recall 1.00, against EPA RE-Powering Mapper sites screened for solar (public ArcGIS, no key).
  • Brownfield Credit Join: proven October 16, 2026 on 24 test cases (8 in the corridor, 16 in Virginia), precision 1.00, recall 1.00, against EPA Facility Registry Service brownfields properties (ACRES; public ArcGIS, no key).
  • Built 100+ Years Ago: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (public map services, no key).
  • Buyout Program Enrollment Join: proven October 16, 2026 on 24 test cases (8 in the corridor, 16 in Virginia), precision 1.00, recall 1.00, against FEMA NFHL flood zones, OpenFEMA HMA acquisition subapplications and Census TIGERweb counties (public, no key).
  • Camp Retreat Conversion Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 1 elsewhere in Colorado, 17 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (leisure.
  • Closed Facility Conversion Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 1 elsewhere in Colorado, 11 in Virginia, 7 elsewhere in the U.S.), precision 1.00, recall 1.00, against HIFLD hospitals and nursing homes (FEMA preparedness copies, public ArcGIS, no key).
  • Coal-to-Nuclear Siting Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 1 elsewhere in Colorado, 12 in Virginia, 8 elsewhere in the U.S.), precision 1.00, recall 1.00, against EIA power plants, EIA-860/860M (public ArcGIS copy, no key).
  • Conservation Burial Grounds Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 21 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap cemeteries via Photon category search and Nominatim outlines (© OpenStreetMap contributors, ODbL) and FEMA NFHL flood zones (public, no key).
  • Conservation Easement Credit Join: proven October 16, 2026 on 24 test cases (7 in the corridor, 17 in Virginia), precision 1.00, recall 1.00, against USGS PAD-US 4.1 easements (public ArcGIS, no key).
  • Correctional Closure Conversion Join: proven October 16, 2026 on 24 test cases (15 in Virginia, 9 elsewhere in the U.S.), precision 1.00, recall 1.00, against HIFLD prison boundaries (FEMA preparedness copy, public ArcGIS, no key).
  • Dealership Distress Join: proven October 16, 2026 on 24 test cases (1 in the corridor, 23 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (shop.
  • Dormant Mineral Abandonment Join: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (mineral accounts and sales; public map services, no key).
  • Drive-In Closure Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 1 elsewhere in Colorado, 12 in Virginia, 8 elsewhere in the U.S.), precision 1.00, recall 1.00, against OpenStreetMap (amenity.
  • EGS Geothermal Site Join: proven October 18, 2026 on 24 test cases (12 in the corridor, 12 elsewhere in Colorado), precision 1.00, recall 0.92, against IHFC Global Heat Flow Database, release 2024 (GFZ Data Services, CC BY 4.0).
  • Exchange Window Join: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (sales and parcel tables; public map services, no key).
  • Farm or Ranch: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (public map services, no key).
  • Federal Grant Round Join: proven October 16, 2026 on 24 test cases (9 in the corridor, 15 in Virginia), precision 1.00, recall 1.00, against FEMA NFHL flood zones, EPA FRS brownfields (ACRES) and the Grants.gov search API (public, no key).
  • Forest Carbon Enrollment Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 18 in Virginia), precision 1.00, recall 1.00, against USGS/USFS NLCD 2021 land cover and tree canopy (MRLC map service) and USGS PAD-US 4 fee lands (public, no key).
  • Geothermal Spring Parcel Join: proven October 16, 2026 on 24 test cases (4 in the corridor, 9 elsewhere in Colorado, 11 in Virginia), precision 1.00, recall 1.00, against NOAA NCEI Thermal Springs in the United States (public ArcGIS, no key).
  • Golf Course Conversion Join: proven October 16, 2026 on 24 test cases (2 in the corridor, 22 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (leisure.
  • Grazing Allotment AUM Join: proven October 16, 2026 on 24 test cases (12 in the corridor, 12 in Virginia), precision 1.00, recall 1.00, against BLM national grazing allotments and Forest Service active range allotments (public ArcGIS, no key).
  • Historic Credit Eligibility Join: proven October 16, 2026 on 24 test cases (24 in Virginia), precision 1.00, recall 1.00, against National Park Service National Register of Historic Places boundaries (public ArcGIS, no key).
  • Historic Farm, Mill or Plantation: proven October 18, 2026 on 24 test cases (21 in the corridor, 3 elsewhere in Colorado), precision 1.00, recall 1.00, against National Park Service National Register of Historic Places boundaries (public ArcGIS, no key).
  • Hunting Lease Income Join: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Colorado Parks and Wildlife Species Activity Mapping, Elk Overall Range (public ArcGIS, no key).
  • Incentive Stack Eligibility Join: proven October 16, 2026 on 24 test cases (4 in the corridor, 20 in Virginia), precision 1.00, recall 1.00, against HUD Opportunity Zones, Colorado DOLA enterprise zones and VEDP Virginia enterprise zones (public ArcGIS, no key).
  • Insurance Non-Renewal Distress Join: proven October 16, 2026 on 24 test cases (10 in the corridor, 9 elsewhere in Colorado, 5 in Virginia), precision 1.00, recall 1.00, against USDA Forest Service Wildfire Hazard Potential 2023, classified (federal GeoPlatform image service, no key).
  • Landlocked Access Join: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor parcel outlines and Census TIGER public roads (public map services, no key).
  • LIHTC Qualified Contract Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 18 in Virginia), precision 1.00, recall 1.00, against HUD Low-Income Housing Tax Credit database (public ArcGIS, no key).
  • Lithium Brine Rights Join: proven October 16, 2026 on 24 test cases (14 in the corridor, 10 in Virginia), precision 1.00, recall 1.00, against USGS Mineral Resources Data System (WFS mrds-high, no key).
  • Mall Anchor Distress Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 21 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (shop.
  • Marina Distress Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 3 elsewhere in Colorado, 16 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (leisure.
  • Mobile Home Park Distress Infill Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 19 in Virginia), precision 1.00, recall 1.00, against Mobile home parks, HIFLD national file (FEMA preparedness copy, public ArcGIS, no key).
  • Mill Closure MW Join: proven October 16, 2026 on 24 test cases (1 elsewhere in Colorado, 16 in Virginia, 7 elsewhere in the U.S.), precision 1.00, recall 1.00, against EPA ECHO facility search (inactive pulp, paper and paperboard mills) and HIFLD substations (public, no key).
  • Miner Interconnect Distress Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 21 in Virginia), precision 1.00, recall 1.00, against HIFLD electric substations (public copy on ArcGIS Online, no key).
  • Mitigation Bank Site Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 18 in Virginia), precision 1.00, recall 1.00, against USACE RIBITS bank locations via EPA NEPAssist (public ArcGIS, no key).
  • Motel Conversion Distress Join: proven October 16, 2026 on 24 test cases (7 elsewhere in Colorado, 17 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (tourism.
  • Motel Conversion Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 21 in Virginia), precision 1.00, recall 1.00, against FEMA USA Structures (ORNL footprints; public ArcGIS view, no key).
  • NEVI Gap Site Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 1 elsewhere in Colorado, 6 in Virginia, 11 elsewhere in the U.S.), precision 1.00, recall 1.00, against FHWA Alternative Fuel Corridors (EV) and DOE AFDC fueling stations via NTAD (public ArcGIS, no key).
  • Nonconformity Envelope Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County zoning maps (county and towns), county parcels and the Assessor's building table (map services).
  • Office Conversion Join: proven October 16, 2026 on 24 test cases (2 in the corridor, 22 in Virginia), precision 1.00, recall 1.00, against FEMA USA Structures (ORNL footprints; public ArcGIS view, no key).
  • Office Conversion Screen Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 21 in Virginia), precision 1.00, recall 1.00, against FEMA USA Structures (ORNL footprints; public ArcGIS view, no key).
  • Old Farm Building: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (public map services, no key).
  • Old Landmark Building: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (public map services, no key).
  • Orphan Well Liability Join: proven October 16, 2026 on 24 test cases (3 in the corridor, 10 in Virginia, 11 elsewhere in the U.S.), precision 1.00, recall 1.00, against USGS Documented Unplugged Orphaned Oil and Gas Well Dataset (public ArcGIS, no key).
  • Opportunity Zone Redesignation Join: proven October 16, 2026 on 24 test cases (8 in the corridor, 16 in Virginia), precision 1.00, recall 1.00, against HUD Opportunity Zones (Treasury-certified 2018 tracts; public ArcGIS, no key).
  • Pore Space Sequestration Join: proven October 16, 2026 on 24 test cases (14 in the corridor, 1 elsewhere in Colorado, 3 in Virginia, 6 elsewhere in the U.S.), precision 1.00, recall 1.00, against USGS National Assessment of Geologic CO2 Storage Resources (energy.usgs.gov map services, no key).
  • Private Airfield Distress Join: proven October 16, 2026 on 24 test cases (9 in the corridor, 15 in Virginia), precision 1.00, recall 1.00, against FAA airport master records (5010) via BTS NTAD Aviation Facilities (public ArcGIS, no key).
  • Quarry Permitted Reserve Join: proven October 16, 2026 on 24 test cases (8 in the corridor, 16 in Virginia), precision 1.00, recall 1.00, against USGS Mineral Resources Data System (WFS mrds-high, no key).
  • Rail Abandonment Reversion Join: proven October 16, 2026 on 24 test cases (12 elsewhere in Colorado, 12 in Virginia), precision 1.00, recall 1.00, against USDOT BTS North American Rail Network lines (NTAD; public ArcGIS, no key).
  • Rail Spur Site Join: proven October 16, 2026 on 24 test cases (7 in the corridor, 17 in Virginia), precision 1.00, recall 1.00, against USDOT BTS North American Rail Network lines (NTAD; public ArcGIS, no key).
  • Rooftop Site Join: proven October 16, 2026 on 24 test cases (1 in the corridor, 23 in Virginia), precision 1.00, recall 1.00, against FEMA USA Structures (ORNL footprints; public ArcGIS view, no key).
  • Rooftop Solar Site Join: proven October 16, 2026 on 24 test cases (4 in the corridor, 20 in Virginia), precision 1.00, recall 1.00, against FEMA USA Structures (ORNL footprints; public ArcGIS view, no key).
  • Salvage Yard Distress Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 19 in Virginia), precision 1.00, recall 1.00, against EPA ECHO facility search (public REST, no key).
  • School Closure Conversion Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 18 in Virginia), precision 1.00, recall 1.00, against NCES public school locations, 2022-23 and current (public ArcGIS, no key).
  • Seasonal Water (Wetland) Join: proven October 16, 2026 on 24 test cases (17 in the corridor, 7 in Virginia), precision 1.00, recall 1.00, against USFWS National Wetlands Inventory (public ArcGIS, no key).
  • Ski Area Distress Join: proven October 16, 2026 on 24 test cases (1 in the corridor, 11 elsewhere in Colorado, 12 in Virginia), precision 1.00, recall 1.00, against OpenStreetMap (landuse.
  • Solar Site Screen Join: proven October 16, 2026 on 24 test cases (6 in the corridor, 11 elsewhere in Colorado, 7 in Virginia), precision 1.00, recall 1.00, against USGS NLCD 2021 (MRLC map service), USGS 3DEP (slope function) and HIFLD substations (public, no key).
  • Stalled Permit Join: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against City of Boulder construction permits and the Boulder County parcel layer (public ArcGIS, no key).
  • Stormwater Fee X Impervious Join: proven October 18, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against NLCD 2021 percent developed imperviousness (MRLC, public domain, no key).
  • Substation Shadow Power Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 19 in Virginia), precision 1.00, recall 1.00, against HIFLD electric substations (public copy on ArcGIS Online, no key).
  • Truck Parking Desert Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 4 elsewhere in Colorado, 8 in Virginia, 7 elsewhere in the U.S.), precision 1.00, recall 1.00, against FHWA National Highway System Interstates and the Jason's Law truck stop parking file via NTAD (public ArcGIS, no key).
  • UST Fund Eligibility Join: proven October 16, 2026 on 24 test cases (9 in the corridor, 15 in Virginia), precision 1.00, recall 1.00, against EPA UST Finder, leaking underground storage tank releases (public ArcGIS, no key).
  • Virginia Jurisdiction Check: proven October 18, 2026 on 9 test cases (1 in the corridor, 7 in Virginia, 1 elsewhere in the U.S.), precision 1.00, recall 1.00, against Census TIGER/Line 2024 Virginia boundary stored in the repository; points at well-known places.
  • Water System Distress Join: proven October 16, 2026 on 24 test cases (2 in the corridor, 22 in Virginia), precision 1.00, recall 1.00, against EPA Community Water System Service Area Boundaries (public ArcGIS, no key) and EPA SDWIS violations (Envirofacts, no key).
  • Well Drill Feasibility Join: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Colorado Division of Water Resources well permits and completion reports (CDSS REST API, no key).
  • Wildfire Insurability Join: proven October 16, 2026 on 24 test cases (18 in the corridor, 6 in Virginia), precision 1.00, recall 1.00, against USDA Forest Service Wildfire Hazard Potential 2023, classified (federal GeoPlatform image service, no key).
  • Wind Lease Siting Join: proven October 16, 2026 on 24 test cases (5 in the corridor, 7 elsewhere in Colorado, 12 in Virginia), precision 1.00, recall 1.00, against U.S. Wind Turbine Database, USGS/LBNL/ACP (public API, no key).
  • Zombie Subdivision Plat Join: proven October 16, 2026 on 24 test cases (24 in the corridor), precision 1.00, recall 1.00, against Boulder County Assessor appraisal records (plat, values and parcel tables; public map services, no key).

The ranking of who is most likely to sell has been graded on 2 days so far; the record is on How we grade.

How we grade ourselves

Questions

About the beta

Is shinnslist free?

The hunt is free while in beta and needs no account. The only thing sold is county tax lien sale packs ($29 a county, $79 for the Colorado season pass) at /liens/.

Why is it free?

Because it does not yet work the way it will when it is sold. 9 of 10 personas are open (Wholesaler and STR investor and Realtor and Flipper and Developer and Cash investor and Fix and rent and Land and Family compound), and they show county records checked by hand, not predictions. 263 of the 314 signals in the catalog have passed an acceptance test against their public source. Nothing will be charged until a persona works as described.

What can I use today?

The hunt's open trades. Wholesaler: Owners whose tax bill goes to another address, who have held the place 10 years or more and paid less than half of what the county says it is worth now. Ranked by what led to profitable deals in Boulder County’s own sales records: a recent estate record on the title first, then heirs holding it, then 30 years or more held, with trouble on the county’s record (unpaid taxes, a foreclosure filing, a vacant or neglected home, an eviction, liens, heirs each owning a share) each adding once. Boulder County. STR investor: Second homes in the mountain towns, Estes Park to Nederland and the Summit, Eagle and Grand County towns: the owner’s tax bill goes to another address. Homes on a named river, near a waterfall or next to national forest first (each a proven signal), then streams and canyons, then the longest-held. Realtor: Homes held 10 years or more with a real life event or distress sign on the county’s record: the taxes are unpaid and the home is on Larimer County’s 2026 tax lien sale list (the treasurer publishes it before the November 19 sale; a Larimer home counts as long held when the county’s seven-year sales record shows no sale of its own), the owner of record is an estate (the owner has died and the estate holds the title, so the heirs or the estate’s representative decide what happens next), an estate record on the title in the last 3 years with no sale since (a death certificate or affidavit, or a personal representative’s deed passing the home to the heirs: of Boulder County homes with one a year ago, 13.5% sold within 12 months, against 4.0% of all homes), the county has confirmed a code violation there or is acting on one (zoning, building, weeds), or a building permit for a new house, an addition or a remodel has gone cold (open 18 months to 6 years, or expired). Newest county record first. Boulder County and the Estes Park end of Larimer County; in every county, the owner of record reads as an estate or its heirs in the county’s own owner name (ESTATE OF, DECEASED, HEIRS, PERSONAL REPRESENTATIVE), on a home held 10 years or more where the county says how long. Flipper: Single-family homes the county has not re-rated since they were built (1990 or before), with no remodel on its record, held 10 years or more, in neighborhoods where updated homes of a similar size sold for at least 30% more per square foot than this home’s county value, in sales the county qualified as arm’s-length. Widest gap first. Boulder County (its sales of the last two years, and its permits) and Adams County (the qualified sales of July 2022 to June 2024 the county set its values with, at its price for June 30, 2024). Developer: Single-family lots where the county values the land at 70% or more of the whole, so the house adds little: teardown, rebuild and infill ground, with each lot’s size (and its zoning in Boulder County and Broomfield). Held 10 years or more. Most valuable land first. Boulder, Larimer, Weld, Adams, Jefferson, Broomfield and Eagle counties. Cash investor: A first cut at rent against price for a cash buy: homes the county values at $150,000 or more where a year of the census tract’s median rent comes to 8% to 15% of the county’s value. The rent is the area’s median for rented homes (for homes with the same number of bedrooms where Boulder County’s building file gives the count and the survey publishes one), from the Census Bureau’s American Community Survey 2020–2024: never this house’s rent, and each card says so. Above 15% the county value is seldom a market price (a deed-restricted home, a partial interest) or the area’s rent does not describe the home, so those are left out. Highest share first. Every county in the hunt with county values. Fix and rent: The Flipper door’s dated homes (not re-rated by the county since they were built, no remodel on its record, held 10 years or more, with updated homes of their size nearby selling for 30%+ more per square foot in sales the county qualified), ranked by how much of the county’s value a year of the census tract’s median rent comes to, for homes with the same number of bedrooms where the survey publishes it: fix, then rent at about the area’s median. The rent is the area’s median from the Census Bureau’s American Community Survey 2020–2024: never this house’s rent, and each card says so. Boulder and Adams counties, where the dated-home facts are. Land: Vacant residential land in Boulder, Larimer, Weld, Broomfield, Summit and Eagle counties: the county’s record shows the land with no house on it (Boulder County also lists its no-value residential land, vacant lots and patented mining claims; Larimer County its town land with no building; Summit and Eagle counties by the state’s vacant land classes: residential lots, planned-unit lots and acreage). Biggest first, with the county’s acreage and value. Government, minerals-only, commercial and industrial land, and land the county marks non-buildable, stay out. Lots last bought in one sale of 3 or more lots, a builder’s or developer’s inventory, are hidden behind their own count: tick it to see them. Utilities and zoning come next. Family compound: Every lot in the nine counties with room for a second household without building new: two homes on one lot, a duplex, triplex or fourplex, a second building of 400 sq ft or more on the aerial (a garage, barn or shop to turn into a unit, recorded or not), a walk-out basement with its own door, or a big house to split. Camps and compounds too: a camp or retreat, a campground with cabins, a lodge or bed and breakfast, or lodging with three or more buildings on five acres or more, from the county’s own class. Each card says how the second unit gets its own door.

Does shinnslist predict who will sell?

The ranking of who is most likely to sell has been graded on 2 days so far; the record is on How we grade.

What happens when I sign up?

We store your email, the persona you picked and the page you signed up on. When that persona goes live we write to you. Nothing is emailed before then, and the list is never sold or shared.

How do I take my email off the list?

Use the remove form on this page. It deletes every signup for that address.

Where does the data come from?

Public records: the Boulder County and Larimer County assessors (where the tax bill is mailed, recorded sales, county values) and free federal maps such as the USGS hydrography and well records. No paid data.

Your email

Take my email off the list

This deletes every signup for that address. Nothing else is kept about you: no name, no IP address, no browser details.