Resolve a Cook County / Chicago street address to its parcel PIN(s).

The no-PIN entry point: when you have a street address but not a 14-digit PIN, call this FIRST, then pass a returned pin to get_cook_county_parcel, get_cook_county_property_dossier, or find_chicago_comparable_sales. Returns ranked candidate parcels, each with pin, prop_address, prop_city, prop_zip, and a 0-1 score (address similarity). Source: Cook County Assessor address records. Paid: $0.01 per call via x402.

Look up a single Cook County / Chicago parcel by PIN.

Returns the parcel record: street address, city, ZIP, assessor property class, township, neighborhood code, ward/municipality, latitude/longitude, and tax year. The cheap single-property lookup; use get_cook_county_property_dossier when you also need sales, permits, and assessment history. Paid: $0.01 per call via x402. Source: Cook County Assessor, refreshed nightly.

Full property dossier for a Cook County / Chicago parcel in one call.

Returns parcel basics PLUS recorded sales & deed history, building permits, and property-tax assessment history, joined and normalized into one record — the one-call due-diligence answer. Permits are LINKED to the PIN here (the raw permit open-data has no PIN; links are derived by address + geo match) — a join you can't reproduce with raw open-data queries. Use for valuation, underwriting, title and lien research prep, and lead enrichment. Paid: $0.03 per call via x402. Public records only; no owner or occupant personal data.

Comparable sales (comps) and a lightweight valuation for a Cook County / Chicago property.

Returns recent arm's-length sales in the same assessor neighborhood and property class as the subject PIN (last ~18 months), plus an implied low/median/high price range. Non-arm's-length and multi-parcel deeds are filtered out — a derived valuation you won't get from a raw open-data query. Use for valuation, investment screening, and underwriting. Paid: $0.10 per call via x402.