A growing directory of US county ArcGIS® REST endpoints for parcel layers. Find your county. Copy the URL. Search by APN, address, or owner name in the UrbanKit parcel lookup with one click.
The atlas is exposed as an MCP server: point Claude, Cursor, or any MCP client at one endpoint and let it resolve addresses, geocode counties, and pull the right REST URL. Eight tools stay public: six read-only discovery tools, get_city_datasets for a city's code-violation, permit and zoning-case datasets, and request_county to ask for a county the atlas does not cover yet. Two key-gated actions go further —enrich_address returns the owner and APN for one address, and radius_owners returns every owner parcel inside a radius.
Every county endpoint in one printable file: REST URL, layer name, key search fields, FIPS code, last-verified date. Regenerated whenever the atlas updates. Licensed CC BY 4.0. No signup, no tracking, no email gate.
Want to know when new counties get added?
The atlas is seeded with hand-verified entries and grows by submission. If you know your county's parcel REST URL, or if a listed entry has moved, tell us. A full four-shard sweep checks every endpoint every two hours, with degraded endpoints re-checked every 30 minutes.
A REST endpoint is only the start. Querying it, converting the output, and tracing a street address down to one parcel are each their own small problem.