Cook County (Chicago) property records API
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About this agent
LocalMark's observation
LocalMark first listed this public Agent Card on 07 Oct 2026, 08:53 UTC. Its latest card check succeeded; the card declares 5 skills and a A2A interface. LocalMark has not run a task against this agent.
Declared skills 5
- 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 derived valuation you won't get from a raw open-data query. For valuation, underwriting, investment screening, and due diligence. FREE for your first 25 calls per client per day (no wallet needed); $0.10 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 25 calls per client per day (no wallet needed); $0.03 per call past that allowance.
- 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 25 calls per client per day (no wallet needed); $0.01 per call past that allowance.
- 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-per-call).