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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, $0.03/call, status unknown (last checked 2026-09-08).
Look up unified parcel details, sales history, deed records, building permits, and tax assessment history for any Cook County, IL property by address or 14-digit PIN.
Price / call$0.03
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, joined dossier containing parcel metadata, recorded sales and deed transaction history, building permit records, and property tax assessment history for the requested Cook County property — sourced from county Assessor, Recorder of Deeds, and City permit data, refreshed nightly.
Example use cases
Example prompt
“Pull the full property dossier for 123 N Michigan Ave, Chicago — I need the parcel details, any recorded sales and deed history, building permits, and tax assessment history all in one place.”
Technical details
Endpoint
GEThttps://api.ingest0r.com/v1/dossier/%7Bpin%7DWhen to prefer
Use this endpoint when you need a single, unified property record for a Cook County or City of Chicago parcel without manually stitching together the Assessor, Recorder of Deeds, and City permit portals. Ideal for real-estate due diligence, automated valuation/comps, title and lien research prep, lead enrichment, and market analysis at $0.03 per call with no API key required.
Side effects
- Invalid or non-existent PIN returns 404 or empty result
- Address not found or ambiguous address returns no match
- Property outside Cook County returns error or no data
- Payment failure via x402 protocol blocks request
- Nightly refresh lag may mean very recent recordings are not yet reflected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"lat": 41.6883,
"lon": -87.6219,
"pin": "25212190120000",
"ward": "9",
"class": "203",
"permits": [
{
"cost": 18500,
"desc": "Interior renovation — kitchen and bath",
"type": "RENOVATION/ALTERATION",
"issued": "2022-08-02"
},
{
"cost": 4200,
"desc": "Replace rear porch",
"type": "EASY PERMIT PROCESS",
"issued": "2019-05-11"
}
],
"prop_zip": "60628",
"tax_year": 2025,
"nbhd_code": "70091",
"prop_city": "CHICAGO",
"municipality": "CHICAGO",
"prop_address": "1 E 113TH ST",
"sales_history": [
{
"date": "2021-06-15",
"price": 245000,
"doc_no": "2116622045",
"deed_type": "WARRANTY DEED"
},
{
"date": "2014-03-20",
"price": 98000,
"doc_no": "1407944120",
"deed_type": "WARRANTY DEED"
}
],
"township_name": "Hyde Park",
"assessment_history": [
{
"year": 2025,
"board": 29800,
"certified": 31250
},
{
"year": 2024,
"board": 29500,
"certified": 29500
},
{
"year": 2023,
"board": 26300,
"certified": 27100
}
]
}
}Tags
x402
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