# Cook County (Chicago) Property Records API

> Cook County (Chicago) Property Records API is a paid API for AI agents from api.ingest0r.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Look up Cook County / Chicago parcel details, recorded sales, deed history, building permits, and tax assessment history by street address or 14-digit PIN

## Facts

- Endpoint: GET https://api.ingest0r.com/v1/search/%7Bq%7D
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cook-county-chicago-property-records-api-be95fb82
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_siKdNTxasw44ygPUAxdQY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability cook-county-chicago-property-records-api-be95fb82
```

Example prompt: Pull up all the property records for 123 N Michigan Ave, Chicago — I need the parcel details, any recorded sales and deed transfers, building permits, and tax assessment history for due diligence on this deal.

## When to prefer this

Use this endpoint when you need consolidated Cook County / Chicago property data — sales history, deed records, permits, and tax assessments — in a single call, without manually stitching multiple county open-data portals. Prefer it over raw government data sources for real estate due diligence, AVM comps research, title/lien prep, or lead enrichment workflows where nightly-refreshed, parcel-keyed data across all record types is needed.

## Known failure modes

- Address not found or ambiguous — returns empty result or error if the street address does not match a known Cook County parcel
- Invalid PIN format — 14-digit PIN required; malformed input returns an error
- Property outside Cook County — only Illinois Cook County parcels are covered; suburban or other-county addresses will not match
- No records available — newly created parcels or data gaps may return partial results
- Payment failure — x402 protocol USDC payment not completed results in 402 response and no data returned

## 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. Replaces stitching the county Assessor, Recorder of Deeds, and City permit open-data portals 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 record containing: parcel metadata (PIN, legal description, land use), recorded sales and deed transfer history, building permit history, and property tax assessment history — sourced from the Cook County Assessor, Recorder of Deeds, and City of Chicago permit portals, refreshed nightly, covering ~1.9M Cook County parcels.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "query": "1 E 113th St",
  "matches": [
   {
    "pin": "25212190120000",
    "score": 0.98,
    "prop_zip": "60628",
    "prop_city": "CHICAGO",
    "prop_address": "1 E 113TH ST"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cook-county-chicago-property-records-api-be95fb82/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.ingest0r.com](https://www.zero.xyz/host/api.ingest0r.com/llms.txt)