# Cook County (Chicago) Property Records API

**Canonical:** https://apis.io/apis/ingest0r-com/cook-county-property-records-api/  
**Provider:** ingest0r — https://apis.io/providers/ingest0r-com/  
**Base URL:** https://api.ingest0r.com  
**Documentation:** https://api.ingest0r.com/

Cook County (Chicago) Property Records API is one of 2 APIs that [ingest0r](https://apis.io/providers/ingest0r-com/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Real Estate, Property Records, Parcel, Geocoding, and Building Permits. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, pricing, a changelog, and authentication docs.

Four GET operations on https://api.ingest0r.com described by the provider's OpenAPI 3.1 (version 0.4.2): v1_search resolves a full or partial street address to ranked parcel PINs with a match_quality flag (always free); v1_parcel returns one parcel record by PIN with the street address joined in ($0.01); v1_dossier returns the full property record — parcel basics plus recorded sales and deed history, building permits linked to the PIN, and assessment history ($0.03); v1_comps returns arm's-length comparable sales over 18 months with an implied low/median/high valuation range ($0.10). No API key: the first 25 paid-route calls per client per day are free (X-Free-Tier-Remaining header), then the route answers HTTP 402 with x402 v2 terms (USDC on Base eip155:8453 or Solana) and is retried with the payment. Every answer carries as_of, source and cite provenance fields and an X-Schema-Version header; the schema is additive-only within /v1. Errors are self-describing JSON {error, detail}; 429 per-IP at 120 requests/minute with Retry-After 60s. Coverage is Cook County, Illinois only; property-keyed public records with no owner or occupant names.

## Operations (4)

| Method | Path | Summary |
|---|---|---|
| GET | `/v1/search/{q}` | Address → PIN lookup for Cook County / Chicago. |
| GET | `/v1/parcel/{pin}` | Single Cook County, IL parcel record by PIN: street address, city, ZIP, assessor property class, township, neighborhood, ward/municipality,… |
| GET | `/v1/dossier/{pin}` | Complete Cook County / Chicago property record in one call: parcel basics PLUS recorded sales & deed history, building permits, and… |
| GET | `/v1/comps/{pin}` | Comparable sales (comps) and a lightweight automated valuation for a Cook County / Chicago property: recent arm's-length sales in the same… |

## Machine-readable artifacts (18)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/openapi/ingest0r-com-openapi.yml
- **OpenAPI** — https://api.ingest0r.com/openapi.json
- **Documentation** — https://api.ingest0r.com/llms.txt
- **APIReference** — https://api.ingest0r.com/
- **Pricing** — https://api.ingest0r.com/pricing
- **ChangeLog** — https://api.ingest0r.com/changelog.json
- **AgentCard** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/a2a/ingest0r-com-a2a.yml
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/authentication/ingest0r-com-authentication.yml
- **Plans** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/plans/ingest0r-com-plans-pricing.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/rate-limits/ingest0r-com-rate-limits.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/errors/ingest0r-com-problem-types.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/conventions/ingest0r-com-conventions.yml
- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/sandbox/ingest0r-com-sandbox.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/data-model/ingest0r-com-data-model.yml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/overlays/ingest0r-com-openapi-overlay.yaml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/apis.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/arazzo/_index.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/arazzo/ingest0r-com-address-to-valuation-workflow.yml

## Other ingest0r APIs (1)

- [Cook County (Chicago) Property Records MCP Server](https://apis.io/apis/ingest0r-com/cook-county-property-records-mcp-server/)

## Tags

Real Estate, Property Records, Parcel, Geocoding, Building Permits, Comparable Sales, x402, Agent-Native

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ingest0r-com/cook-county-property-records-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ingest0r-com/.