King County Permit Status MCP server

King County Permit Status

Look up building permit history and status across King County, WA jurisdictions — county-level permits (septic, critical areas, grading) and city-level permits (building, mechanical, electrical) can all apply to the same address. Coverage is live where a jurisdiction offers an open permit feed, and falls back to the correct municipal portal link everywhere else.

<!-- BEGIN COVERAGE (generated by scripts/gen_scorecard.py) -->

Coverage today: 🟢 20/39 cities live (status + history) · 🟠 19/39 indexed (issued-permit history from the King County Assessor; current status needs the city portal, which next_step names) · plus unincorporated King County. See the coverage scorecard below for the per-city breakdown.

<!-- END COVERAGE -->

python3 lookup.py "27927 E Main St"           # by address
python3 lookup.py "7222000353"                  # by parcel number
python3 lookup.py "B25000947"                   # by permit number
python3 lookup.py "23-127651-LP"                # Bellevue permit number
python3 lookup.py "6145915-CN"                  # Seattle SDCI permit number
python3 lookup.py --pipe "27927 E Main St"      # agent pipeline mode
python3 lookup.py --limit 10 --since 2020-01-01 --type electrical "27927 E Main St"   # shape: newest 10 electrical since 2020
python3 lookup.py --all "27927 E Main St"       # every permit (default is the 50 newest + a summary of all)
python3 lookup.py --schema                      # print tool definition

Hosted API + MCP (no install)

The same lookup is served read-only, no auth, from permits-api.secondlandings.ai (server.py, zero dependencies; see deploy/README.md):

Results are live; the server caches each query for 15 minutes and rate-limits per client (30/min) to protect the municipal portals. Known hosted-only gap: Tyler's hosted Civic Access (Redmond) returns 403 to datacenter IPs, so from the hosted endpoint a Redmond lookup carries the Assessor index plus a nextstep with reason: sourceblocked instead of live Redmond records; run lookup.py locally for those. Every other source answers from the droplet. Run it yourself with python3 server.py or docker compose up — server.json is the MCP Registry manifest.

Parcel-number searches query every supported MyBuildingPermit and live city portal because a bare parcel number does not identify its city jurisdiction.

Address searches are routed by geometry, not the mailing city: the address is geocoded with King County's four-county locator and the point is tested against the city-limits polygons. A "Kent, WA" address that sits in unincorporated King County is searched as county, not Kent; an address with no city in it is routed correctly instead of fanning out to every jurisdiction; and Pierce-side addresses of Milton/Pacific/Auburn get a pierce: parcel id. The mailing city is only used when geocoding fails (jurisdiction.basis says which).

What you get

Shortened. The full README is on GitHub.