Cook County Property MCP README
The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the Cook County Property MCP listing page.
Cook County / Chicago Property Data — MCP server
A hosted, pay-per-call Model Context Protocol (MCP) server for Cook County, Illinois — including the City of Chicago — property records: parcels, recorded sales & deed history, building permits, and property-tax assessment history, joined and normalized into one answer. Plus comparable sales (comps) and a lightweight automated valuation.
No signup, no API key — pay per call via the x402 protocol (USDC on Base or Solana).
What this adds over raw open data
This returns finished, joined answers — not raw rows you have to query and stitch. The county open data (Socrata) can't give you:
- Building permits linked to a PIN. The Chicago permits feed has no PIN field — the permit→parcel link is derived here (exact address match + nearest-parcel geo match). You can't reproduce this with a raw SoQL query.
- A street address on a parcel. Parcel Universe has no address; it's joined in from a separate dataset here.
- Comparable-sales valuation. Arm's-length filtering, same-neighborhood/class matching, and an implied low/median/high range — derived analysis, not a row fetch.
So one call returns a normalized property record; against raw open data you'd orchestrate multiple datasets and rebuild joins that don't exist upstream.
Connect
- Remote MCP endpoint:
https://api.ingest0r.com/mcp(streamable-http — add it to any MCP client; nothing to install) - PulseMCP: cook-county-property-data
- Official MCP Registry:
com.ingest0r.api/cook-county-property-data - Website / HTTP API: https://api.ingest0r.com
- Free example response (no payment): https://api.ingest0r.com/v1/sample
Tools
| Tool | Price | Description |
|---|---|---|
get_free_sample | FREE | Fixed example of every response shape — evaluate before paying. |
search_chicago_property_by_address | FREE | Resolve a street address → parcel PIN(s). The no-PIN entry point. |
get_cook_county_parcel | $0.01 | Single parcel record by 14-digit PIN. |
get_cook_county_property_dossier | $0.03 | Full dossier: address, sales & deed history, permits, assessment history. |
find_chicago_comparable_sales | $0.10 | Comparable sales + implied low/median/high valuation. |
The PIN tools return an HTTP 402 with machine-readable x402 payment terms; pay in USDC and retry. Search and the sample are free — and three real parcels are served free on the paid routes (live data you can verify against the county's own portals): 09253050270000 · 09253060510000 · 09253140190000.
Data & coverage
~1.9M parcels, refreshed nightly from Cook County Assessor, Cook County Recorder of Deeds, and City of Chicago open-data portals (Socrata). Property-keyed public records only — no owner/occupant personal data.
Use cases
Real-estate due diligence, automated valuation / comps, title & lien research prep, lead enrichment, and market analysis — for autonomous agents and LLM pipelines.