HUD - US Department of Housing and Urban Development

The U.S. Department of Housing and Urban Development (HUD) provides public REST APIs for fair housing data, Fair Market Rents, Income Limits, USPS ZIP code crosswalk files, Comprehensive Housing Affordability Strategy (CHAS) data, and housing counseling agency search. All HUD User dataset APIs require a free bearer token obtained from the HUD User portal; the Housing Counselor search API is publicly accessible without authentication.

HUD - US Department of Housing and Urban Development publishes 5 APIs on the APIs.io network, including CHAS API, Fair Market Rents API, Housing Counseling API, and 2 more. Tagged areas include Housing, Government, Fair Market Rent, Mortgage, and Community Development.

The HUD - US Department of Housing and Urban Development catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

HUD - US Department of Housing and Urban Development’s developer surface includes authentication, documentation, engineering blog, pricing, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.0/100 developing ▼ -5.0 Agent 41/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreeOpen⚡ Free to try

10 APIs

HousingGovernmentFair Market RentMortgageCommunity DevelopmentPublic HousingSection 8Income Limits

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 44.0/100 · developing

Contract Quality 16.8 / 25

Developer Ergonomics 4.3 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 2.7 / 13

Governance 7.0 / 12

Discoverability 7.4 / 10

Agent readiness — 41/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/hud: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 10

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

Rate Limits 1

Documented rate limits and quota policies.

Hud Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

Examples 3

Example request and response payloads for these APIs.

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: hud
name: HUD - US Department of Housing and Urban Development
description: The U.S. Department of Housing and Urban Development (HUD) provides public REST APIs for fair housing data, Fair
  Market Rents, Income Limits, USPS ZIP code crosswalk files, Comprehensive Housing Affordability Strategy (CHAS) data, and
  housing counseling agency search. All HUD User dataset APIs require a free bearer token obtained from the HUD User portal;
  the Housing Counselor search API is publicly accessible without authentication.
type: Index
accessModel:
  pricing: free
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Free · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hud.png
url: https://raw.githubusercontent.com/api-evangelist/hud/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Housing
- Government
- Fair Market Rent
- Mortgage
- Community Development
- Public Housing
- Section 8
- Income Limits
apis:
- name: HUD User Fair Market Rents API
  description: Provides Fair Market Rent (FMR) data by state, county, and metropolitan area. Returns efficiency through four-bedroom
    rental rates used as the basis for Section 8 Housing Choice Voucher payment standards.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.huduser.gov/portal/dataset/fmr-api.html
  baseURL: https://www.huduser.gov/hudapi/public/fmr
  tags:
  - Fair Market Rent
  - Housing
  - Section 8
  properties:
  - type: Documentation
    url: https://www.huduser.gov/portal/dataset/fmr-api.html
  - type: Authentication
    url: https://www.huduser.gov/hudapi/public/register
- name: HUD User Income Limits API
  description: Returns HUD Income Limits at 30%, 50%, and 80% of Area Median Income (AMI) thresholds by geographic area. Used
    to determine eligibility for HUD housing assistance programs.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.huduser.gov/portal/dataset/api.html
  baseURL: https://www.huduser.gov/hudapi/public/il
  tags:
  - Income Limits
  - Housing Assistance
  - AMI
  properties:
  - type: Documentation
    url: https://www.huduser.gov/portal/dataset/api.html
  - type: Authentication
    url: https://www.huduser.gov/hudapi/public/register
- name: HUD User USPS ZIP Code Crosswalk API
  description: Maps USPS ZIP codes to and from census tracts, counties, CBSAs, congressional districts, and county subdivisions.
    Supports geographic lookups and crosswalk queries for housing analysis.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.huduser.gov/portal/dataset/uspszip-api.html
  baseURL: https://www.huduser.gov/hudapi/public/usps
  tags:
  - ZIP Code
  - Crosswalk
  - Geography
  - Census
  properties:
  - type: Documentation
    url: https://www.huduser.gov/portal/dataset/uspszip-api.html
  - type: Authentication
    url: https://www.huduser.gov/hudapi/public/register
- name: HUD User CHAS API
  description: Comprehensive Housing Affordability Strategy (CHAS) data provides custom tabulations of American Community
    Survey data on housing needs at national, state, county, and municipal levels. Used for Consolidated Planning submissions.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.huduser.gov/portal/dataset/chas-api.html
  baseURL: https://www.huduser.gov/hudapi/public/chas
  tags:
  - CHAS
  - Housing Affordability
  - Community Planning
  - ACS
  properties:
  - type: Documentation
    url: https://www.huduser.gov/portal/dataset/chas-api.html
  - type: Authentication
    url: https://www.huduser.gov/hudapi/public/register
- name: HUD Housing Counselor Search API
  description: Search for HUD-approved housing counseling agencies by name, city, state, or geographic coordinates. Returns
    agency contact information and services offered. No API key required.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.hud.gov/housing_counseling.html
  baseURL: https://data.hud.gov/Housing_Counselor/search
  tags:
  - Housing Counseling
  - Agency Search
  - Public
  properties:
  - type: Documentation
    url: https://data.hud.gov/housing_counseling.html
- aid: hud:hud-chas-api
  name: HUD - US Department of Housing and Urban Development CHAS API
  description: Comprehensive Housing Affordability Strategy data
  humanURL: https://www.huduser.gov/portal/dataset/fmr-api.html
  baseURL: https://www.huduser.gov/hudapi/public/fmr
  tags:
  - CHAS
  properties:
  - type: OpenAPI
    url: openapi/hud-chas-api-openapi.yml
- aid: hud:hud-fair-market-rents-api
  name: HUD - US Department of Housing and Urban Development Fair Market Rents API
  description: Fair Market Rent data by geography
  humanURL: https://www.huduser.gov/portal/dataset/fmr-api.html
  baseURL: https://www.huduser.gov/hudapi/public/fmr
  tags:
  - Fair Market Rents
  properties:
  - type: OpenAPI
    url: openapi/hud-fair-market-rents-api-openapi.yml
- aid: hud:hud-housing-counseling-api
  name: HUD - US Department of Housing and Urban Development Housing Counseling API
  description: HUD-approved housing counseling agency search
  humanURL: https://www.huduser.gov/portal/dataset/fmr-api.html
  baseURL: https://www.huduser.gov/hudapi/public/fmr
  tags:
  - Housing Counseling
  properties:
  - type: OpenAPI
    url: openapi/hud-housing-counseling-api-openapi.yml
- aid: hud:hud-income-limits-api
  name: HUD - US Department of Housing and Urban Development Income Limits API
  description: Area Median Income limits by geography
  humanURL: https://www.huduser.gov/portal/dataset/fmr-api.html
  baseURL: https://www.huduser.gov/hudapi/public/fmr
  tags:
  - Income Limits
  properties:
  - type: OpenAPI
    url: openapi/hud-income-limits-api-openapi.yml
- aid: hud:hud-zip-code-crosswalk-api
  name: HUD - US Department of Housing and Urban Development ZIP Code Crosswalk API
  description: ZIP code to geographic area crosswalk queries
  humanURL: https://www.huduser.gov/portal/dataset/fmr-api.html
  baseURL: https://www.huduser.gov/hudapi/public/fmr
  tags:
  - ZIP Code Crosswalk
  properties:
  - type: OpenAPI
    url: openapi/hud-zip-code-crosswalk-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/hud-agentic-access.yml
- type: DomainSecurity
  url: security/hud-domain-security.yml
- type: Authentication
  url: authentication/hud-authentication.yml
- type: Website
  url: https://www.hud.gov/
- type: Documentation
  url: https://www.huduser.gov/portal/dataset/api.html
- type: GitHubOrg
  url: https://github.com/HUD-Data-Lab
- type: LinkedIn
  url: https://www.linkedin.com/company/us-department-of-housing-and-urban-development/
- type: Blog
  url: https://www.hud.gov/press/blog
- type: Pricing
  url: https://www.huduser.gov/portal/dataset/api-terms-of-service.html
- type: StatusPage
  url: https://data.hud.gov/
- type: X
  url: https://x.com/HUDgov
- type: Plans
  url: plans/hud-plans-pricing.yml
- type: RateLimits
  url: rate-limits/hud-rate-limits.yml
- type: FinOps
  url: finops/hud-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com