ingest0r

ingest0r operates the Cook County (Chicago) property records API at api.ingest0r.com — a pay-per-call, agent-native REST API over Cook County, Illinois public records (~1.9M parcels, refreshed nightly) that resolves a street address to its parcel PIN, then returns parcel details, recorded sales and deed history, building permits linked to the PIN, property-tax assessment history and comparable-sales valuation as one joined answer. There is no signup and no API key: address search and a fixed sample are always free, the first 25 PIN-route calls per client per day return real data free, and past that the routes answer HTTP 402 and are settled per call in USDC on Base or Solana through the x402 protocol ($0.01, $0.03 and $0.10). The provider publishes an OpenAPI 3.1, an A2A agent card, a live streamable-HTTP MCP server with five tools, llms.txt, an x402 resource list, a machine-readable price card and changelog, and a security.txt — all on api.ingest0r.com. The operator identifies itself only as "independent" (the agent card's provider.organization) with a personal contact address; the apex ingest0r.com has no DNS A record, so the API host is the website.

ingest0r publishes 5 API contracts indexed on the APIs.io network, including Comps API, Dossier API, Parcel API, and 2 more. Tagged areas include Company, Real Estate, Property Records, Property Data, and Public Records.

ingest0r’s developer surface includes documentation, pricing, changelog, authentication, sandbox, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.1/100 developing ▬ flat Agent 41/100 agent native Front door AI 3/6 light Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

4 published contracts 1 MCP Servers

Company Real Estate Property Records Property Data Public Records Open Data Government Data GeocodingProperty TaxBuilding PermitsComparable SalesValuation x402 Agentic Commerce MCP A2A Agent-Native Chicago IllinoisLand Parcels

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 47.1/100 · developing

Contract Quality 10.5 / 21

Developer Ergonomics 6.4 / 17

Access Clarity 7.2 / 17

Operational Transparency 6.1 / 11

Contract Governance 1.9 / 10

Discoverability 6.8 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 41/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/ingest0r-com: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

x402

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

Cook County (Chicago) Property Records MCP Server

A live remote MCP server at https://api.ingest0r.com/mcp (streamable-http, JSON-RPC 2.0 over HTTP POST, protocol 2025-11-25, serverInfo cook-county-chicago-property-data 1.27.2)...

ingest0r Comps API

The Comps API from ingest0r — 1 operation(s) for comps.

ingest0r Dossier API

The Dossier API from ingest0r — 1 operation(s) for dossier.

ingest0r Parcel API

The Parcel API from ingest0r — 1 operation(s) for parcel.

ingest0r Search API

The Search API from ingest0r — 1 operation(s) for search.

Arazzo Workflows 1

Multi-step API workflows described with the Arazzo specification.

Cook County address to dossier and comps

Resolve a street address to its parcel PIN, fetch the full property dossier, then fetch comparable sales and an implied value range.

ARAZZO

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

ingest0r MCP Server

Remote MCP server at api.ingest0r.com over HTTP; 5 tools listed.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Ingest0R Com Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Ingest0R Com Rate Limits

2 limits

RATE LIMITS

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Ingest0R Com Openapi Overlay

13 actions · documentation · ingest0r-com-openapi.yml

UNRECORDED

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Ingest0R Com Authentication

none/payment · 2 schemes

SECURITY

Ingest0R Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Ingest0R Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Ingest0R Com Agentic Access

4 operations

4 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer

WellKnown

LLMsTxt

AgentSkill

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Arazzo

Build 2

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Packages

Packages

Access & Security 6

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

SecurityTxt

SecurityTxt

Authentication

Authentication

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 4

Status, limits, changes, and where to get help

ChangeLog

Deprecation

ChangeLog

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

AgentCard

AgentCard

Overlay

Overlay

Source (apis.yml)

aid: ingest0r-com
name: ingest0r
description: 'ingest0r operates the Cook County (Chicago) property records API at api.ingest0r.com — a pay-per-call, agent-native
  REST API over Cook County, Illinois public records (~1.9M parcels, refreshed nightly) that resolves a street address to
  its parcel PIN, then returns parcel details, recorded sales and deed history, building permits linked to the PIN, property-tax
  assessment history and comparable-sales valuation as one joined answer. There is no signup and no API key: address search
  and a fixed sample are always free, the first 25 PIN-route calls per client per day return real data free, and past that
  the routes answer HTTP 402 and are settled per call in USDC on Base or Solana through the x402 protocol ($0.01, $0.03 and
  $0.10). The provider publishes an OpenAPI 3.1, an A2A agent card, a live streamable-HTTP MCP server with five tools, llms.txt,
  an x402 resource list, a machine-readable price card and changelog, and a security.txt — all on api.ingest0r.com. The operator
  identifies itself only as "independent" (the agent card''s provider.organization) with a personal contact address; the apex
  ingest0r.com has no DNS A record, so the API host is the website.'
url: https://raw.githubusercontent.com/api-evangelist/ingest0r-com/refs/heads/main/apis.yml
image: https://api.ingest0r.com/favicon.svg
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-19 (local-v3) on the a2a-registry harvest stub
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Company
- Real Estate
- Property Records
- Property Data
- Public Records
- Open Data
- Government Data
- Geocoding
- Property Tax
- Building Permits
- Comparable Sales
- Valuation
- x402
- Agentic Commerce
- MCP
- A2A
- Agent-Native
- Chicago
- Illinois
- Land Parcels
tags_raw:
- Company
- Real Estate
- Property Records
- Property Data
- Public Records
- Open Data
- Government Data
- Geocoding
- Property Tax
- Building Permits
- Comparable Sales
- Valuation
- x402
- Agent Commerce
- MCP
- A2A
- agent-native
- Chicago
- Illinois
- Real-Estate
- Land Parcels
apis:
- aid: ingest0r-com:cook-county-property-records-mcp-server
  name: Cook County (Chicago) Property Records MCP Server
  description: 'A live remote MCP server at https://api.ingest0r.com/mcp (streamable-http, JSON-RPC 2.0 over HTTP POST, protocol
    2025-11-25, serverInfo cook-county-chicago-property-data 1.27.2) exposing five read-only tools: get_free_sample ($0, fixed
    example of every response shape), search_chicago_property_by_address (always free), get_cook_county_parcel ($0.01), get_cook_county_property_dossier
    ($0.03) and find_chicago_comparable_sales ($0.10), each annotated readOnlyHint/idempotentHint true. tools/list answers
    anonymously — no OAuth, no API key — and the first 25 paid-tool calls per client per day are free; past that the tool
    result carries the x402 402 under _meta["x402/error"] and accepts payment via _meta["x402/payment"] (agents-SDK x402 convention).
    The server is also advertised at /.well-known/mcp.json. Each tool binds one-to-one to an OpenAPI operationId (see the
    tool crosswalk).'
  humanURL: https://api.ingest0r.com/mcp
  baseURL: https://api.ingest0r.com/mcp
  tags:
  - MCP
  - Real Estate
  - Property Records
  - x402
  - Agent-Native
  tags_raw:
  - MCP
  - Real Estate
  - Property Records
  - x402
  - agent-native
  - Real-Estate
  properties:
  - type: MCPServer
    url: mcp/ingest0r-com-mcp.yml
  - type: MCPServer
    name: MCP endpoint (provider-hosted, streamable-http)
    url: https://api.ingest0r.com/mcp
  - type: ToolCrosswalk
    url: mcp/ingest0r-com-tool-crosswalk.yml
  - type: Documentation
    url: https://api.ingest0r.com/llms.txt
- aid: ingest0r-com:ingest0r-com-comps-api
  name: ingest0r Comps API
  description: The Comps API from ingest0r — 1 operation(s) for comps.
  humanURL: https://api.ingest0r.com/
  baseURL: https://api.ingest0r.com/mcp
  tags:
  - Comps
  properties:
  - type: OpenAPI
    url: openapi/ingest0r-com-comps-api-openapi.yml
  - type: Documentation
    url: https://api.ingest0r.com/llms.txt
  - type: APIReference
    url: https://api.ingest0r.com/
  - type: Pricing
    url: https://api.ingest0r.com/pricing
  - type: ChangeLog
    url: https://api.ingest0r.com/changelog.json
  - type: AgentCard
    url: a2a/ingest0r-com-a2a.yml
  - type: Authentication
    url: authentication/ingest0r-com-authentication.yml
  - type: Plans
    url: plans/ingest0r-com-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/ingest0r-com-rate-limits.yml
  - type: ErrorCatalog
    url: errors/ingest0r-com-problem-types.yml
  - type: Conventions
    url: conventions/ingest0r-com-conventions.yml
  - type: Sandbox
    url: sandbox/ingest0r-com-sandbox.yml
  - type: DataModel
    url: data-model/ingest0r-com-data-model.yml
- aid: ingest0r-com:ingest0r-com-dossier-api
  name: ingest0r Dossier API
  description: The Dossier API from ingest0r — 1 operation(s) for dossier.
  humanURL: https://api.ingest0r.com/
  baseURL: https://api.ingest0r.com/mcp
  tags:
  - Dossier
  properties:
  - type: OpenAPI
    url: openapi/ingest0r-com-dossier-api-openapi.yml
  - type: Documentation
    url: https://api.ingest0r.com/llms.txt
  - type: APIReference
    url: https://api.ingest0r.com/
  - type: Pricing
    url: https://api.ingest0r.com/pricing
  - type: ChangeLog
    url: https://api.ingest0r.com/changelog.json
  - type: AgentCard
    url: a2a/ingest0r-com-a2a.yml
  - type: Authentication
    url: authentication/ingest0r-com-authentication.yml
  - type: Plans
    url: plans/ingest0r-com-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/ingest0r-com-rate-limits.yml
  - type: ErrorCatalog
    url: errors/ingest0r-com-problem-types.yml
  - type: Conventions
    url: conventions/ingest0r-com-conventions.yml
  - type: Sandbox
    url: sandbox/ingest0r-com-sandbox.yml
  - type: DataModel
    url: data-model/ingest0r-com-data-model.yml
- aid: ingest0r-com:ingest0r-com-parcel-api
  name: ingest0r Parcel API
  description: The Parcel API from ingest0r — 1 operation(s) for parcel.
  humanURL: https://api.ingest0r.com/
  baseURL: https://api.ingest0r.com/mcp
  tags:
  - Parcel
  properties:
  - type: OpenAPI
    url: openapi/ingest0r-com-parcel-api-openapi.yml
  - type: Documentation
    url: https://api.ingest0r.com/llms.txt
  - type: APIReference
    url: https://api.ingest0r.com/
  - type: Pricing
    url: https://api.ingest0r.com/pricing
  - type: ChangeLog
    url: https://api.ingest0r.com/changelog.json
  - type: AgentCard
    url: a2a/ingest0r-com-a2a.yml
  - type: Authentication
    url: authentication/ingest0r-com-authentication.yml
  - type: Plans
    url: plans/ingest0r-com-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/ingest0r-com-rate-limits.yml
  - type: ErrorCatalog
    url: errors/ingest0r-com-problem-types.yml
  - type: Conventions
    url: conventions/ingest0r-com-conventions.yml
  - type: Sandbox
    url: sandbox/ingest0r-com-sandbox.yml
  - type: DataModel
    url: data-model/ingest0r-com-data-model.yml
- aid: ingest0r-com:ingest0r-com-search-api
  name: ingest0r Search API
  description: The Search API from ingest0r — 1 operation(s) for search.
  humanURL: https://api.ingest0r.com/
  baseURL: https://api.ingest0r.com/mcp
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/ingest0r-com-search-api-openapi.yml
  - type: Documentation
    url: https://api.ingest0r.com/llms.txt
  - type: APIReference
    url: https://api.ingest0r.com/
  - type: Pricing
    url: https://api.ingest0r.com/pricing
  - type: ChangeLog
    url: https://api.ingest0r.com/changelog.json
  - type: AgentCard
    url: a2a/ingest0r-com-a2a.yml
  - type: Authentication
    url: authentication/ingest0r-com-authentication.yml
  - type: Plans
    url: plans/ingest0r-com-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/ingest0r-com-rate-limits.yml
  - type: ErrorCatalog
    url: errors/ingest0r-com-problem-types.yml
  - type: Conventions
    url: conventions/ingest0r-com-conventions.yml
  - type: Sandbox
    url: sandbox/ingest0r-com-sandbox.yml
  - type: DataModel
    url: data-model/ingest0r-com-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: VulnerabilityDisclosure
  url: security/ingest0r-com-vulnerability-disclosure.yml
- type: Website
  name: API host landing page (the apex ingest0r.com has no DNS A record)
  url: https://api.ingest0r.com/
- type: Documentation
  url: https://api.ingest0r.com/llms.txt
- type: Pricing
  url: https://api.ingest0r.com/pricing
- type: ChangeLog
  name: Changelog (provider-hosted JSON)
  url: https://api.ingest0r.com/changelog.json
- type: AgentCard
  url: a2a/ingest0r-com-a2a.yml
- type: MCPServer
  url: mcp/ingest0r-com-mcp.yml
- type: ToolCrosswalk
  url: mcp/ingest0r-com-tool-crosswalk.yml
- type: WellKnown
  url: well-known/ingest0r-com-well-known.yml
- type: SecurityTxt
  url: well-known/ingest0r-com-security.txt
- type: LLMsTxt
  url: llms/ingest0r-com-llms.txt
- type: Packages
  url: packages/ingest0r-com-packages.yml
- type: Overlay
  url: overlays/ingest0r-com-openapi-overlay.yaml
- type: Conformance
  url: conformance/ingest0r-com-conformance.yml
- type: ErrorCatalog
  url: errors/ingest0r-com-problem-types.yml
- type: Lifecycle
  url: lifecycle/ingest0r-com-lifecycle.yml
- type: Deprecation
  name: Additive-only /v1 compatibility policy with /v1 kept alive across a /v2 break (changelog.json)
  url: lifecycle/ingest0r-com-lifecycle.yml
- type: Authentication
  url: authentication/ingest0r-com-authentication.yml
- type: DomainSecurity
  url: security/ingest0r-com-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/ingest0r-com-vulnerability-disclosure.yml
- type: Security
  name: Vulnerability disclosure contact (RFC 9116 security.txt)
  url: security/ingest0r-com-vulnerability-disclosure.yml
- type: Sandbox
  url: sandbox/ingest0r-com-sandbox.yml
- type: Conventions
  url: conventions/ingest0r-com-conventions.yml
- type: ChangeLog
  url: changelog/ingest0r-com-changelog.yml
- type: DataModel
  url: data-model/ingest0r-com-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/ingest0r-com-agentic-access.yml
- type: Plans
  url: plans/ingest0r-com-plans-pricing.yml
- type: RateLimits
  url: rate-limits/ingest0r-com-rate-limits.yml
- type: Arazzo
  name: Address to dossier and comps
  url: arazzo/ingest0r-com-address-to-valuation-workflow.yml
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 36
  pass: local-v3
x-coverage:
  state: covered
  detail: Every surface the provider publishes was fetched from its own host and verified live — OpenAPI 3.1, A2A agent card
    (graded near-conformant), MCP server (initialize + tools/list answered anonymously), x402 v2 payment challenge (observed,
    not settled), llms.txt, security.txt, machine-readable pricing and changelog — and the free tier, 400 and 404 responses
    were exercised without payment; the only wall is that the apex ingest0r.com has no DNS A record, so the API host is the
    website.
  evidence:
  - url: https://api.ingest0r.com/openapi.json
    status: 200
  - url: https://api.ingest0r.com/.well-known/agent-card.json
    status: 200
  - url: https://api.ingest0r.com/mcp
    status: 200
  - url: https://api.ingest0r.com/v1/parcel/%7Bpin%7D
    status: 402
  - url: https://ingest0r.com/
    status: 0
  checked: '2026-09-19'
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://api.ingest0r.com/.well-known/agent-card.json
  grade: near-conformant
  protocol_version: 0.3.0
  control: 404
x-tags-removed:
- Parcel

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