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Cook County (Chicago) Property Records API
x402
Cook County (Chicago) Property Records API is a paid API for AI agents from api.ingest0r.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).
Look up Cook County/Chicago parcel details, sales history, deed records, building permits, and tax assessment history by street address or 14-digit PIN
Price / call$0.1
Success—
StatusUnknown
How this service works
Pay-per-call property-records API for Cook County, Illinois — including the City of Chicago. Look up any property by street ADDRESS or 14-digit PIN and get parcel details, recorded sales & deed history, building permits, and property-tax assessment history, joined and normalized into one answer. Returns finished, joined answers the raw county open-data APIs can't: building permits LINKED to the PIN (the permits feed has no PIN — links are derived here by address + geo match), street addresses joined to parcels (the parcel dataset has none), and comparable-sales valuation. You get the answer, not rows to query, stitch, and derive yourself. Use for real-estate due diligence, automated valuation / comparable-sales (comps), title and lien research prep, lead enrichment, and market analysis. ~1.9M parcels, refreshed nightly, property-keyed (public records only — no personal data). No signup or API key: pay per call via the x402 protocol (USDC on Base or Solana).
Output
A normalized JSON object combining parcel metadata, recorded sales and deed history, building permit records, and property tax assessment history for the queried Cook County property, sourced from the county Assessor, Recorder of Deeds, and City of Chicago permit portals.
Example use cases
Example prompt
“Pull the full property record for 1234 N Clark St Chicago IL — I need the parcel details, sales and deed history, any building permits, and tax assessment history all in one shot.”
Technical details
Endpoint
GEThttps://api.ingest0r.com/v1/comps/%7Bpin%7DWhen to prefer
Choose this endpoint when you need Cook County / Chicago property data aggregated from multiple county sources (Assessor, Recorder, City permits) in a single call, without managing separate API integrations. Ideal for real-estate due diligence, automated valuation, comparable-sales analysis, title research prep, and lead enrichment workflows where paying per-call is preferable to building and maintaining scraper pipelines against public portals.
Side effects
- PIN or address not found in the ~1.9M parcel database — returns 404 or empty result
- Malformed 14-digit PIN or unparseable address — returns 400 validation error
- Payment not received or insufficient USDC balance via x402 — returns 402 Payment Required
- Data temporarily stale if nightly refresh has not yet completed — may return prior-night snapshot
- Ambiguous address matching multiple parcels — may return multiple candidates or require PIN disambiguation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"pin": "25212190120000",
"comps": [
{
"pin": "25212190140000",
"deed_type": "WARRANTY DEED",
"sale_date": "2024-09-12",
"sale_price": 262000,
"prop_address": "5 E 113TH ST"
}
],
"implied_range": {
"n": 7,
"low": 238000,
"high": 271000,
"median": 255000
}
}
}Tags
x402
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