# Cook County / Chicago Property Data (free tier, no wallet needed)

> Cook County / Chicago property by address or PIN: sales, permits, assessments, comps. 100 free/day.

- name: com.ingest0r.api/cook-county-property-data
- version: 0.4.3
- connection class: R0 (autonomous)
- trust: 82/100 flags: no-repository
- quality: 91/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.ingest0r.api%2Fcook-county-property-data
- tools: https://api.protogrid.dev/v1/servers/com.ingest0r.api%2Fcook-county-property-data/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "cook-county-property-data": {
      "type": "http",
      "url": "https://api.ingest0r.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 98
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-96% +updated-4d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 91/100 (strong)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 5 of 5 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,290 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 3 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 5, about 1,290 tokens to load them all
- tool set hash: f11133068ae272d24caf0235e2c38b95
- tools last changed: 2026-10-16T08:35:29.664Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.ingest0r.api/cook-county-property-data.svg)](https://protogrid.dev/servers/com.ingest0r.api/cook-county-property-data)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-16 `find_chicago_comparable_sales` changed (title, description, inputSchema)
  - before: FREE for your first 25 calls each day — no wallet, no signup, just call it ($0.10 per call via x402/USDC only after that daily allowance, which resets at 00:00 UTC). Recent arm's-length comparable sales (comps) in the same Cook County assessor neighborhood and property class as the given PIN, each with its distance in metres from the subject, plus an implied low/median/high price range — a derived, lightweight automated valuation (AVM) you won't get from a raw open-data query. Thin markets widen automatically and the response reports which matching rung was used. Comps are NOT normalized for building size or age.
  - after: FREE for your first 100 calls each day — no wallet, no signup, just call it ($0.10 per call via x402/USDC only after that daily allowance, which resets at 00:00 UTC). Recent arm's-length comparable sales (comps) in the same Cook County assessor neighborhood and property class as the given PIN, each with its distance in metres from the subject, plus an implied low/median/high price range — a derived, lightweight automated valuation (AVM) you won't get from a raw open-data query. Thin markets widen automatically and the response reports which matching rung was used. Comps are NOT normalized for building size or age.
- 2026-10-16 `get_cook_county_property_dossier` changed (title, description, inputSchema)
  - before: FREE for your first 25 calls each day — no wallet, no signup, just call it ($0.03 per call via x402/USDC only after that daily allowance, which resets at 00:00 UTC). Full Cook County / Chicago property dossier for a PIN: parcel basics, recorded sales & deed history, building permits, property-tax assessment history, and neighborhood / ward / school / walkability context — the one-call due-diligence record. Permits are LINKED to the PIN here (the raw permit open-data has no PIN; links are derived by address + geo match), so this is a finished record you cannot reproduce with raw open-data queries. Note assessment values are ASSESSED values (~10% of market for most residential classes), not market prices — see assessment_note in the response.
  - after: FREE for your first 100 calls each day — no wallet, no signup, just call it ($0.03 per call via x402/USDC only after that daily allowance, which resets at 00:00 UTC). Full Cook County / Chicago property dossier for a PIN: parcel basics, recorded sales & deed history, building permits, property-tax assessment history, and neighborhood / ward / school / walkability context — the one-call due-diligence record. Permits are LINKED to the PIN here (the raw permit open-data has no PIN; links are derived by address + geo match), so this is a finished record you cannot reproduce with raw open-data queries. Note assessment values are ASSESSED values (~10% of market for most residential classes), not market prices — see assessment_note in the response.
- 2026-10-16 `get_cook_county_parcel` changed (title, description, inputSchema)
  - before: FREE for your first 25 calls each day — no wallet, no signup, just call it ($0.01 per call via x402/USDC only after that daily allowance, which resets at 00:00 UTC). Cook County, IL parcel record for a 10- or 14-digit PIN. Returns: pin, prop_address, prop_city, prop_zip, class, township_name, nbhd_code, municipality, ward, police_district, census_tract_geoid, school_elementary_district, school_secondary_district, walk_score_cmap, airport_noise_dnl, lat, lon, tax_year. The cheap single-property lookup — use get_cook_county_property_dossier for sales, permits and assessments.
  - after: FREE for your first 100 calls each day — no wallet, no signup, just call it ($0.01 per call via x402/USDC only after that daily allowance, which resets at 00:00 UTC). Cook County, IL parcel record for a 10- or 14-digit PIN. Returns: pin, prop_address, prop_city, prop_zip, class, township_name, nbhd_code, municipality, ward, police_district, census_tract_geoid, school_elementary_district, school_secondary_district, walk_score_cmap, airport_noise_dnl, lat, lon, tax_year. The cheap single-property lookup — use get_cook_county_property_dossier for sales, permits and assessments.

Full history: https://api.protogrid.dev/v1/servers/com.ingest0r.api%2Fcook-county-property-data/changes

## Remotes

- https://api.ingest0r.com/mcp (streamable-http, auth none, reachable true, uptime30d 0.9557522)

## Packages

_none_

## Tools (5)

- `find_chicago_comparable_sales`: FREE for your first 100 calls each day — no wallet, no signup, just
call it ($0.10 per call via x402/USDC only after that daily allowance,
which resets at 00:00 UTC). Recent arm's-length comparable sales (comps)
in the same Cook County assessor neighborhood and property class as the
given PIN, each with its distance in metres from the subject, plus an
implied low/median/high price range — a derived, lightweight automated
valuation (AVM) you won't get from a raw open-data query. Thin markets
widen automatically and the response reports which matching rung was
used. Comps are NOT normalized for building size or age.
- `get_cook_county_parcel`: FREE for your first 100 calls each day — no wallet, no signup, just
call it ($0.01 per call via x402/USDC only after that daily allowance,
which resets at 00:00 UTC). Cook County, IL parcel record for a 10- or
14-digit PIN. Returns: pin, prop_address, prop_city, prop_zip, class,
township_name, nbhd_code, municipality, ward, police_district,
census_tract_geoid, school_elementary_district,
school_secondary_district, walk_score_cmap, airport_noise_dnl, lat, lon,
tax_year. The cheap single-property lookup — use
get_cook_county_property_dossier for sales, permits and assessments.
- `get_cook_county_property_dossier`: FREE for your first 100 calls each day — no wallet, no signup, just
call it ($0.03 per call via x402/USDC only after that daily allowance,
which resets at 00:00 UTC). Full Cook County / Chicago property dossier
for a PIN: parcel basics, recorded sales & deed history, building
permits, property-tax assessment history, and neighborhood / ward /
school / walkability context — the one-call due-diligence record.
Permits are LINKED to the PIN here (the raw permit open-data has no PIN;
links are derived by address + geo match), so this is a finished record
you cannot reproduce with raw open-data queries. Note assessment values
are ASSESSED values (~10% of market for most residential classes), not
market prices — see assessment_note in the response.
- `get_free_sample`: FREE ($0, unlimited, no payment, no wallet): a fixed, representative
example of every response shape this server returns for Cook County /
Chicago property data — address search, parcel, dossier (recorded sales,
building permits, assessment history) and comparable sales. Call this
FIRST to validate the data structure before anything else. For REAL
verified data at $0, call get_cook_county_property_dossier with one of
the always-free example PINs 09253060510000, 09253140190000,
09253050270000.
- `search_chicago_property_by_address`: ALWAYS FREE, unlimited, no wallet and no signup. Resolve a Cook County
/ Chicago street address (full or partial) to its parcel PIN(s) — ranked
candidates with address, city, ZIP, a match score and a match_quality
flag. A trailing city/state/ZIP is fine ('1 E 113th St, Chicago, IL
60628'). CHECK match_quality: 'exact' is certain, 'likely' shares the
house number, and 'weak' means NO candidate matched the house number —
do not rely on a weak hit. Call this FIRST when you have an address but
not a PIN, then pass a returned pin to get_cook_county_parcel /
get_cook_county_property_dossier / find_chicago_comparable_sales.
Coverage: Cook County, Illinois — Chicago plus 100+ suburbs including
Evanston, Oak Park, Cicero and Skokie.