{"protocolVersion":"0.3.0","name":"Cook County (Chicago) property records API","description":"Pay-per-call property-records API for Cook County, Illinois \u2014 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 \u2014 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 \u2014 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 25 calls per client per day return real data free; x402 (USDC on Base/Solana) covers anything beyond that.","url":"https://api.ingest0r.com","version":"0.4.2","documentationUrl":"https://api.ingest0r.com/llms.txt","provider":{"organization":"independent","url":"https://api.ingest0r.com"},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"capabilities":{"streaming":false,"extensions":[{"uri":"https://x402.org/extensions/payments","description":"Pay-per-call via x402 (HTTP 402 + USDC). Applies ONLY past the free daily allowance of 25 calls per client; address search, the sample and the live example PINs never need payment.","required":false,"params":{"protocol":"x402","x402Version":2,"accepts":[{"scheme":"exact","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","currency":"USDC","payTo":"0x98D530C0667A4B18e692F182DdCAb1c2bECb5B9B"},{"scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","currency":"USDC","payTo":"G3qr8ahZnuFSYjvrCYM4LLDdoLzFq8Boq9XrURVcA9YF"}],"prices":{"/v1/search":"0","/v1/parcel":"10000","/v1/dossier":"30000","/v1/comps":"100000"},"currency":"USDC"}}]},"securitySchemes":{},"x-free-sample":"https://api.ingest0r.com/v1/sample","x-free-tier":{"calls_per_day":25,"applies_to":["/v1/comps","/v1/dossier","/v1/parcel"],"resets":"daily at 00:00 UTC","metering":"per client","note":"Just call the paid routes: the first 25 calls a day return real data with no payment and no wallet. Past that they return the normal 402 and x402 settles the rest. Headers X-Free-Tier-Remaining / X-Free-Tier report where you stand."},"x-rate-limit":{"requests_per_minute":120},"x-links":{"openapi":"https://api.ingest0r.com/openapi.json","x402_resources":"https://api.ingest0r.com/.well-known/x402","llms":"https://api.ingest0r.com/llms.txt","pricing":"https://api.ingest0r.com/pricing","changelog":"https://api.ingest0r.com/changelog.json","mcp":"https://api.ingest0r.com/mcp"},"skills":[{"id":"v1_sample","name":"sample","description":"FREE fixed example of every paid response shape \u2014 evaluate the data structure and quality for $0 before paying. Not a live record; see also the free live example PINs in the manifest.","tags":["free","sample","evaluation","real-estate","property-data","cook-county"],"inputModes":["application/json"],"outputModes":["application/json"],"x-endpoint":"https://api.ingest0r.com/v1/sample","x-price":"$0.00"},{"id":"v1_search","name":"search","description":"Address \u2192 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) \u2014 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 \u2014 call this before /v1/dossier, /v1/parcel, or /v1/comps. Public assessor records. FREE \u2014 no payment required (the PIN routes are pay-per-call).","tags":["real-estate","property-data","cook-county","public-records"],"inputModes":["application/json"],"outputModes":["application/json"],"x-endpoint":"https://api.ingest0r.com/v1/search/{q}","x-price":"$0.00","x-input-schema":{"type":"object","required":["q"],"properties":{"q":{"type":"string","description":"Street address or partial (4+ chars), e.g. '1 E 113th St'. A trailing city/state/ZIP is fine and is stripped ('1 E 113th St, Chicago, IL 60628')."}}},"x-output-schema":{"type":"object","properties":{"query":{"type":"string"},"normalized":{"type":"string","description":"the street portion actually matched"},"match_quality":{"type":"string","description":"exact | likely | weak | none. Only 'exact' is certain; 'weak' means no candidate shares the house number - do not rely on it"},"matches":{"type":"array","items":{"type":"object","properties":{"pin":{"type":"string"},"prop_address":{"type":"string"},"prop_city":{"type":"string"},"prop_zip":{"type":"string"},"exact":{"type":"boolean"},"score":{"type":"number","description":"0-1 address similarity"}}}}}}},{"id":"v1_parcel","name":"parcel","description":"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 \u2014 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.","tags":["real-estate","property-data","cook-county","public-records"],"inputModes":["application/json"],"outputModes":["application/json"],"x-endpoint":"https://api.ingest0r.com/v1/parcel/{pin}","x-price":"$0.01","x-input-schema":{"type":"object","required":["pin"],"properties":{"pin":{"type":"string","description":"Cook County PIN, 10 or 14 digits, dashes ok (14-08-120-017-0000). Only have an address? /v1/search first."}}},"x-output-schema":{"type":"object","properties":{"pin":{"type":"string"},"prop_address":{"type":"string"},"prop_city":{"type":"string"},"prop_zip":{"type":"string"},"class":{"type":"string"},"township_name":{"type":"string"},"nbhd_code":{"type":"string"},"tax_year":{"type":"integer"},"lat":{"type":"number"},"lon":{"type":"number"},"municipality":{"type":"string"},"ward":{"type":"string"},"police_district":{"type":"string"},"census_tract_geoid":{"type":"string"},"school_elementary_district":{"type":"string"},"school_secondary_district":{"type":"string"},"walk_score_cmap":{"type":"number"},"airport_noise_dnl":{"type":"number"}}}},{"id":"v1_dossier","name":"dossier","description":"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) \u2014 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.","tags":["real-estate","property-data","cook-county","public-records"],"inputModes":["application/json"],"outputModes":["application/json"],"x-endpoint":"https://api.ingest0r.com/v1/dossier/{pin}","x-price":"$0.03","x-input-schema":{"type":"object","required":["pin"],"properties":{"pin":{"type":"string","description":"Cook County PIN, 10 or 14 digits, dashes ok (14-08-120-017-0000). Only have an address? /v1/search first."}}},"x-output-schema":{"type":"object","properties":{"pin":{"type":"string"},"prop_address":{"type":"string"},"class":{"type":"string"},"municipality":{"type":"string"},"ward":{"type":"string"},"sales_history":{"type":"array","items":{"type":"object","properties":{"date":{"type":"string"},"price":{"type":"number"},"doc_no":{"type":"string"},"deed_type":{"type":"string"}}}},"permits":{"type":"array","items":{"type":"object","properties":{"issued":{"type":"string"},"type":{"type":"string"},"cost":{"type":"number"},"desc":{"type":"string"}}}},"assessment_history":{"type":"array","items":{"type":"object","properties":{"year":{"type":"integer"},"certified":{"type":"number"},"board":{"type":"number"},"mailed":{"type":"number"},"stage":{"type":"string","description":"pending|mailed|certified|board"}}}},"assessment_note":{"type":"string","description":"ASSESSED values, not market value or tax owed"}}}},{"id":"v1_comps","name":"comps","description":"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 \u2014 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.","tags":["real-estate","property-data","cook-county","public-records"],"inputModes":["application/json"],"outputModes":["application/json"],"x-endpoint":"https://api.ingest0r.com/v1/comps/{pin}","x-price":"$0.10","x-input-schema":{"type":"object","required":["pin"],"properties":{"pin":{"type":"string","description":"Cook County PIN, 10 or 14 digits, dashes ok (14-08-120-017-0000). Only have an address? /v1/search first."}}},"x-output-schema":{"type":"object","properties":{"pin":{"type":"string"},"comps":{"type":"array","items":{"type":"object","properties":{"pin":{"type":"string"},"prop_address":{"type":"string"},"sale_date":{"type":"string"},"sale_price":{"type":"number"},"deed_type":{"type":"string"},"comp_class":{"type":"string"},"distance_m":{"type":"number","description":"metres from the subject parcel"}}}},"method":{"type":"string","description":"which matching rung produced these comps"},"implied_range":{"type":"object","properties":{"low":{"type":"number"},"median":{"type":"number"},"high":{"type":"number"},"n":{"type":"integer"}}}}}}]}