specification: API Commons Plans
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/Plans
provider: Federal Housing Finance Agency (FHFA)
providerId: fhfa
created: '2026-06-13'
modified: '2026-06-13'
tags:
  - Housing Finance
  - House Price Index
  - Mortgage
  - Government
  - GSE
  - Federal
description: >-
  FHFA provides all public data APIs and datasets free of charge as a federal
  government agency. No registration, API key, or subscription is required for
  accessing publicly available datasets. Usage is governed by the FHFA API
  Terms of Service, which requires attribution on any application consuming
  FHFA data. There are no paid tiers; all data is open and publicly accessible.
plans:
  - id: fhfa-public
    name: Public Access
    type: free
    description: >-
      All FHFA data APIs and datasets are freely available to the public with
      no registration, API key, or subscription required. This includes the
      House Price Index, National Mortgage Database, Public Use Databases,
      Conforming Loan Limits, UAD statistics, and all other published datasets.
      Attribution is required per the FHFA API Terms of Service.
    entries:
      - label: API Requests
        description: Unrestricted access to public data downloads and API endpoints
        name: api_requests
        type: quota
        metric: requests
        limit: 0
        timeFrame: month
        geo: global
        domains: []
        unit: 1
        price: '0.00'
        userMultiplied: false
    elements:
      - name: FHFA House Price Index (HPI) API
      - name: FHFA National Mortgage Database (NMDB) API
      - name: FHFA Enterprise Public Use Database (PUDB) API
      - name: FHFA Conforming Loan Limits API
      - name: FHFA Uniform Appraisal Dataset (UAD) Aggregate Statistics API
      - name: CSV Data Downloads
      - name: JSON Data Downloads
      - name: XML Data Downloads
      - name: Interactive Dashboards
      - name: HPI Calculator
      - name: Data Dictionaries
      - name: Technical Documentation
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com