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Where the information came from. Everything here is assembled from material a member of the public can reach with a browser and no credentials — the company's own website, developer portal and documentation, the specifications it publishes for public use (OpenAPI, AsyncAPI, JSON Schema,
apis.json,llms.txtand similar), its public repositories, and its public status, pricing and changelog pages. Nothing here is obtained by breaching a system, defeating an access control, or using credentials of any kind.The rating is an independent assessment. The Kin Score and Agent Readiness rating are independently calculated scores of a company's public API artifacts, produced by API Evangelist against a published rubric. They are not certifications, endorsements, security assessments, or audits, and they score published artifacts — not the quality, safety, or security of the software.
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Full detail: Where this data comes from
APIs.json profile for the U.S. Department of Housing and Urban Development (HUD) public REST APIs.
- Fair Market Rents API — FMR data by state, county, and metro area (Section 8 payment standard basis)
- Income Limits API — AMI thresholds at 30/50/80% for housing program eligibility
- USPS ZIP Code Crosswalk API — ZIP-to-census geography mapping (tracts, counties, CBSAs, congressional districts)
- CHAS API — Comprehensive Housing Affordability Strategy data from ACS custom tabulations
- Housing Counselor Search API — Find HUD-approved housing counseling agencies by location
HUD User dataset APIs require a free bearer token. Register at https://www.huduser.gov/hudapi/public/register
The Housing Counselor Search API is publicly accessible with no authentication required.
- HUD User APIs: 1,200 requests per minute per token
- Housing Counselor API: unspecified limit; HTTP 429 returned when exceeded
- Developer Portal: https://www.huduser.gov/portal/dataset/api.html
- Data Catalog: https://data.hud.gov/datasets
- Terms of Service: https://www.huduser.gov/portal/dataset/api-terms-of-service.html
- Contact: OpenData@hud.gov