llms.txt
+13 −6
https://permit-stack.com/llms.txt
− > PermitStack is a REST API for U.S. building permit data: 119M+ permits from 8,000+ U.S. cities across 48 states and DC, ingested nightly, with a free tier and transparent self-serve pricing from $29/mo.− - **Coverage:** 119M+ building permits from 8,000+ U.S. cities across 48 states and DC, sourced from 900 active data sources (including counties and statewide feeds), plus 75 historical-archive sources that are transparently labeled (not counted as live).− - **Solar:** 6.9M+ classified solar permits, including statewide California (~3.24M) and New York (~426K) installation datasets — a differentiator most permit APIs lack.− - **Contractors:** 2M+ contractors with searchable permit work history. Contractor **name, license number, and trade classification** are on every plan including free. Contractor **business phone** (329K+ contractors), **email** (95K+), and business mailing address — extracted from permit records and joined to public state license-board rosters, where the source provides them — are available on the Developer plan ($79/mo) and up.− - **Freshness:** sources are re-read on a nightly schedule, but currency varies by jurisdiction: some sources publish late, and 288 active sources currently sit behind a host that refuses our requests (labelled 'access blocked', data older than the rest); each jurisdiction's newest-record ("data through") date is published on the coverage page. Each jurisdiction also carries a `data_status` flag (`active` / `historical_archive` / `frozen`) so staleness is never hidden — unusual transparency for − _Last updated: 2026-10-23_+ > PermitStack is a REST API for U.S. building permit data: 121M+ permits from 8,000+ U.S. cities across 48 states and DC, ingested nightly, with a free tier and transparent self-serve pricing from $29/mo.+ - **Coverage:** 121M+ building permits from 8,000+ U.S. cities across 48 states and DC, sourced from 905 active data sources (including counties and statewide feeds), plus 75 historical-archive sources that are transparently labeled (not counted as live).+ - **Solar:** 6.9M+ classified solar permits, including statewide California (~3.26M) and New York (~427K) installation datasets — a differentiator most permit APIs lack.+ - **Contractors:** 2M+ contractors with searchable permit work history. Contractor **name, license number, and trade classification** are on every plan including free. Contractor **business phone** (371K+ contractors), **email** (121K+), and business mailing address — extracted from permit records and joined to public state license-board rosters, where the source provides them — are available on the Developer plan ($79/mo) and up.+ - **Freshness:** sources are re-read on a nightly schedule, but currency varies by jurisdiction: some sources publish late, and 294 active sources currently sit behind a host that refuses our requests (labelled 'access blocked', data older than the rest); each jurisdiction's newest-record ("data through") date is published on the coverage page. Each jurisdiction also carries a `data_status` flag (`active` / `historical_archive` / `frozen`) so staleness is never hidden — unusual transparency for + Dataset add-ons are added to an existing plan from the dashboard and billed on the same subscription (never a second one), prorated; they are not sold on their own or below Developer.+ - **Contractor licensing add-on** — $19/mo or $190/yr: licence number, type, class, status and issue/expiry dates as state licence boards publish them; add to Developer; included in Business and Scale+ - **Contractor licensing Pro add-on** — $29/mo or $290/yr: everything in Contractor licensing plus bond, liability insurance, workers' comp and discipline where the board publishes them (only some do: bond and insurance from Washington and Oregon, insurance also from Oklahoma roofing, workers' comp from Oregon, Oklahoma roofing and New York's public-work contractor registry, discipline from Minnesota, New Jersey, Colorado, Florida, Washington (L&I strikes and debarments), Delaware and the New Yo+ - **Certificates of occupancy add-on** — $29/mo or $290/yr: certificate number, type, status and date, address, parcel, occupancy class, units and the linked permit where held; add to Developer; included in Business and Scale+ - **Contractor licences (Contractor licensing add-on; included in Business and Scale):** `GET /v1/licenses/lookup?license_number=&state=` (one licence in one issuing state) and `GET /v1/contractors/{id}/licenses` (licences linked to one of our contractors by exact licence number or exact unique name, never fuzzy). Bond, insurance, workers' comp and discipline fields are Pro-only and listed in `locked_fields` below Pro. No phone, email or street address on this surface.+ - **Certificates of occupancy (add-on; included in Business and Scale):** `GET /v1/certificates/search` (city, state, ZIP, address, parcel, radius, date and occupancy filters; defaults to issued or expired occupancy certificates, renewals excluded), `GET /v1/certificates/{id}`, and `GET /v1/certificates/coverage` (which places we hold, how current; works with any API key, so you can check before buying)+ - [Connect PermitStack to Claude, ChatGPT and other AI apps (MCP)](https://permit-stack.com/docs/connectors/): hosted MCP server at https://mcp.permit-stack.com/mcp, read-only, sign in with your PermitStack account+ _Last updated: 2026-11-05_