Cook County (Chicago) property records API

Name: Cook County (Chicago) property records API
Author: independent

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when	check	result	http	latency	detail
2 h ago	a2a card	ok	200	351 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
9 h ago	a2a card	ok	200	353 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
16 h ago	a2a card	ok	200	343 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
22 h ago	a2a card	ok	200	465 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
28 h ago	a2a card	ok	200	529 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
34 h ago	a2a card	ok	200	356 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
2 d ago	a2a card	ok	200	349 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
2 d ago	a2a card	ok	200	369 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
2 d ago	a2a card	ok	200	336 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills
3 d ago	a2a card	ok	200	363 ms	protocol 0.3.0 · card: Cook County (Chicago) property records API · 5 skills

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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 and no API key. Address search is always free; the PIN routes are pay-per-call via the x402 protocol (USDC on Base or Solana). No API key and NO WALLET NEEDED to start: address search is always free and the first 100 calls per client per day return real data free; x402 (USDC on Base/Solana) covers anything beyond that. Need more volume without a crypto wallet? Email hyperionxmota@gmail.com.

freesampleevaluationreal-estateproperty-datacook-countypublic-records

Declared skills

sample — FREE fixed example of every paid response shape — evaluate the data structure and quality for $0 before paying. Not a live record; see also the free live example PINs in the manifest.
search — Address → PIN lookup for Cook County / Chicago. Resolve a full or partial STREET ADDRESS to its parcel PIN(s): ranked candidate parcels with address, city, ZIP, a match score and a match_quality flag (exact | likely | weak | none) — resolving the address-to-parcel gap (the raw parcel dataset has no address). The entry point when you have an address but not a PIN — call this before /v1/dossier, /v1/parcel, or /v1/comps. Public assessor records. FREE — no payment required (the PIN routes are pay-…
parcel — Single Cook County, IL parcel record by PIN: street address, city, ZIP, assessor property class, township, neighborhood, ward/municipality, census tract, school districts, walkability and airport-noise context, and lat/lon — with the street address joined in (the raw parcel dataset has none). The cheap single-property lookup. Source: Cook County Assessor, refreshed nightly. FREE for your first 100 calls per client per day (no wallet needed); $0.01 per call past that allowance.
dossier — Complete Cook County / Chicago property record in one call: parcel basics PLUS recorded sales & deed history, building permits, and property-tax assessment history, joined and normalized, with neighborhood/ward/school/walkability context. Permits are LINKED to the PIN (the raw permit feed has none) — one finished record, not raw rows to stitch. For due diligence, valuation, underwriting. Nightly-fresh; no personal data. FREE for your first 100 calls per client per day (no wallet needed); $0.03 …
comps — Comparable sales (comps) and a lightweight automated valuation for a Cook County / Chicago property: recent arm's-length sales in the same assessor neighborhood and property class over the last 18 months, with an implied low/median/high price range, each comp carrying its distance in metres from the subject. Thin markets widen automatically (36 months, then the property-class group) and the response reports which rung was used. Non-arm's-length and multi-parcel deeds are filtered out — a derive…

kind A2A Agent Card

name A2A Agent Card

summary A2A Agent Card

version A2A Agent Card

description A2A Agent Card

homepageUrl A2A Agent Card

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A2A Agent Cardhttps://api.ingest0r.com/.well-known/agent-card.json

first seen 2 mo ago · fetched 7 d agoopen ↗

Field history (9 recent events)

7 d ago · declared · description → "Pay-per-call property-records API for Cook County, Illinois — including the City of Chicago. Look up any property by st
7 d ago · declared · version → "0.4.3"
2 mo ago · declared · publisherName → "independent"
2 mo ago · declared · publisherUrl → "https://api.ingest0r.com"
2 mo ago · declared · summary → "Pay-per-call property-records API for Cook County, Illinois — including the City of Chicago. Look up any property by st
2 mo ago · declared · version → "0.4.2"
2 mo ago · declared · protocols → ["a2a"]
2 mo ago · declared · homepageUrl → "https://api.ingest0r.com/llms.txt"
2 mo ago · declared · description → "Pay-per-call property-records API for Cook County, Illinois — including the City of Chicago. Look up any property by st

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