The Federal Housing Finance Agency (FHFA) is an independent federal regulator established in 2008 that supervises Fannie Mae, Freddie Mac, and the Federal Home Loan Bank System. FHFA provides publicly accessible data APIs and datasets covering house price indexes (FHFA HPI), mortgage market surveys, conforming loan limits, National Mortgage Database (NMDB) aggregate statistics, Public Use Databases (PUDB) for Fannie Mae and Freddie Mac, Uniform Appraisal Dataset (UAD) statistics, and GSE performance and duty-to-serve data. Data is available in CSV, JSON, XML, and Excel formats with open public access under FHFA's API Terms of Service.
Federal Housing Finance Agency (FHFA) is listed with 7 APIs on the APIs.io network. Tagged areas include Housing Finance, House Price Index, Mortgage, Government, and Government-Sponsored Enterprise.
The Federal Housing Finance Agency (FHFA) catalog on APIs.io includes 1 JSON-LD context.
Federal Housing Finance Agency (FHFA)’s developer surface includes support, code examples, documentation, engineering blog, and 20 more developer resources.
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 could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
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/.
Show this score on your site.
It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/fhfa/"><img src="https://apis.io/badge/fhfa/card.svg" alt="Federal Housing Finance Agency (FHFA) on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
Machine-Readable Auth+10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency+9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics+8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
11 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
The Kin Score Market layer reads a provider inside its market:
its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted:
not part of the Kin Score or agent readiness.
Registered MCP server and declares compatibility are report only — not weighted.
Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
The FHFA House Price Index (HPI) is a comprehensive, publicly available dataset measuring changes in single-family home values across all 50 states and over 400 American cities,...
The National Mortgage Database (NMDB) is a nationally representative, longitudinal database of residential mortgages providing aggregate statistics on outstanding residential mo...
The FHFA Enterprise Public Use Database (PUDB) provides loan-level data on single-family and multifamily mortgages acquired by Fannie Mae and Freddie Mac, as well as data on Fed...
FHFA publishes annual conforming loan limit (CLL) values establishing the maximum mortgage amounts that Fannie Mae and Freddie Mac may purchase. Data is available at the county ...
The FHFA Uniform Appraisal Dataset (UAD) Aggregate Statistics provide data on residential appraisals submitted to Fannie Mae and Freddie Mac, covering appraisal values, property...
FHFA's agency data catalog, published as a Project Open Data v1.1 (DCAT-US) JSON-LD document at https://www.fhfa.gov/data/data.json. 39 datasets and 50 distributions covering th...
The FHFA House Price Index distributed as bulk files over anonymous HTTPS GET. The master series at https://www.fhfa.gov/hpi/download/monthly/hpi_master.json returns 186,011 obs...
Scroll for all 7
Federal Housing Finance Agency (FHFA) API pricing
Not yet checked against Federal Housing Finance Agency (FHFA)'s own pricing page. Compiled by API Evangelist on 2026-06-13; confirm before you rely on a figure. A free plan or tier is listed.
aid: fhfa
url: https://raw.githubusercontent.com/api-evangelist/fhfa/refs/heads/main/apis.yml
name: Federal Housing Finance Agency (FHFA)
type: Index
deliveryModel:
model: saas
open_source: false
commercial: true
callable_host: false
label: Hosted service · you call their endpoint
confidence: medium
source:
- pricing
generated: '2026-08-28'
method: derived
accessModel:
pricing: free
onboarding: open
trial: false
try_now: true
public: true
gated: none
gated_source:
- onboarding
label: Free · Open access
confidence: low
source:
- plans
- security
generated: '2026-11-06'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fhfa.png
tags:
- Housing Finance
- House Price Index
- Mortgage
- Government
- Government-Sponsored Enterprise
- Fannie Mae
- Freddie Mac
- Federal
tags_raw:
- Housing Finance
- House Price Index
- Mortgage
- Government
- GSE
- Fannie Mae
- Freddie Mac
- Federal
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
description: The Federal Housing Finance Agency (FHFA) is an independent federal regulator established in 2008 that supervises
Fannie Mae, Freddie Mac, and the Federal Home Loan Bank System. FHFA provides publicly accessible data APIs and datasets
covering house price indexes (FHFA HPI), mortgage market surveys, conforming loan limits, National Mortgage Database (NMDB)
aggregate statistics, Public Use Databases (PUDB) for Fannie Mae and Freddie Mac, Uniform Appraisal Dataset (UAD) statistics,
and GSE performance and duty-to-serve data. Data is available in CSV, JSON, XML, and Excel formats with open public access
under FHFA's API Terms of Service.
apis:
- aid: fhfa:fhfa-house-price-index-api
name: FHFA House Price Index (HPI) API
tags:
- House Price Index
- Housing
- CSV
- JSON
- XML
humanURL: https://www.fhfa.gov/data/hpi
properties:
- url: https://www.fhfa.gov/data/hpi
type: Documentation
- url: https://www.fhfa.gov/data/hpi/datasets
type: Datasets
- url: https://www.fhfa.gov/hpi/download/monthly/hpi_master.csv
type: DataDownloadCSV
- url: https://www.fhfa.gov/hpi/download/monthly/hpi_master.xml
type: DataDownloadXML
- url: https://www.fhfa.gov/sites/default/files/2023-09/HPI_dictionary.xls
type: DataDictionary
- url: https://www.fhfa.gov/data/hpi/summary-tables
type: SummaryTables
- url: https://www.fhfa.gov/hpi-calculator
type: Calculator
description: The FHFA House Price Index (HPI) is a comprehensive, publicly available dataset measuring changes in single-family
home values across all 50 states and over 400 American cities, with data extending back to the mid-1970s. The HPI uses
a weighted repeat-sales methodology based on tens of millions of home sales and is available in CSV, JSON, and XML formats
at monthly and quarterly intervals. Datasets include purchase-only indexes, all-transaction indexes incorporating appraisal
data, expanded-data indexes adding FHA and county recorder data, and volatility parameters. Data is free and publicly
accessible with attribution required under FHFA API Terms of Service.
- aid: fhfa:fhfa-national-mortgage-database-api
name: FHFA National Mortgage Database (NMDB) API
tags:
- Mortgage
- National Mortgage Database
- Statistics
- CSV
humanURL: https://www.fhfa.gov/data/nmdb
properties:
- url: https://www.fhfa.gov/data/nmdb
type: Documentation
- url: https://www.fhfa.gov/data/nsmo
type: RelatedDataset
- url: https://www.fhfa.gov/data/dashboard/nmdb-outstanding-residential-mortgage-statistics
type: Dashboard
description: The National Mortgage Database (NMDB) is a nationally representative, longitudinal database of residential
mortgages providing aggregate statistics on outstanding residential mortgages and mortgage originations. Data covers loan
characteristics, borrower demographics, and geographic distributions. NMDB aggregate statistics and National Survey of
Mortgage Originations (NSMO) data are downloadable as CSV files with interactive Tableau dashboards for visualization.
- aid: fhfa:fhfa-public-use-database-api
name: FHFA Enterprise Public Use Database (PUDB) API
tags:
- Fannie Mae
- Freddie Mac
- Government-Sponsored Enterprise
- Mortgage
- Public Use Database
- CSV
tags_raw:
- Fannie Mae
- Freddie Mac
- GSE
- Mortgage
- Public Use Database
- CSV
humanURL: https://www.fhfa.gov/data/pudb
properties:
- url: https://www.fhfa.gov/data/pudb
type: Documentation
- url: https://www.fhfa.gov/data/public-use-database
type: Overview
description: The FHFA Enterprise Public Use Database (PUDB) provides loan-level data on single-family and multifamily mortgages
acquired by Fannie Mae and Freddie Mac, as well as data on Federal Home Loan Bank member institutions. Files include National
File A, B, and C for single-family mortgages and property-level and unit-class-level files for multifamily. Data is downloadable
as zipped CSV files with accompanying data dictionaries.
- aid: fhfa:fhfa-conforming-loan-limits-api
name: FHFA Conforming Loan Limits API
tags:
- Conforming Loan Limits
- Fannie Mae
- Freddie Mac
- Mortgage
- CSV
humanURL: https://www.fhfa.gov/data/conforming-loan-limit
properties:
- url: https://www.fhfa.gov/data/conforming-loan-limit
type: Documentation
description: FHFA publishes annual conforming loan limit (CLL) values establishing the maximum mortgage amounts that Fannie
Mae and Freddie Mac may purchase. Data is available at the county level for all U.S. states and territories, downloadable
in XLSX, CSV, and PDF formats. Limits are adjusted annually per the Housing and Economic Recovery Act (HERA) formula,
with higher limits for designated high-cost areas.
- aid: fhfa:fhfa-uad-aggregate-statistics-api
name: FHFA Uniform Appraisal Dataset (UAD) Aggregate Statistics API
tags:
- Appraisal
- UAD
- Housing
- Statistics
humanURL: https://www.fhfa.gov/data/uad
properties:
- url: https://www.fhfa.gov/data/uad
type: Documentation
- url: https://www.fhfa.gov/data/uad/puf
type: PublicUseFile
- url: https://www.fhfa.gov/data/dashboard
type: Dashboard
description: The FHFA Uniform Appraisal Dataset (UAD) Aggregate Statistics provide data on residential appraisals submitted
to Fannie Mae and Freddie Mac, covering appraisal values, property characteristics, and geographic distributions. An Appraisal-Level
Public Use File (PUF) with anonymized individual appraisal records is also available for research.
- aid: federal-housing-finance-agency:federal-housing-finance-agency
name: Federal Housing Finance Agency Data Catalog
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/federal-housing-finance-agency.png
tags:
- Open Data
- Datasets
humanURL: https://www.fhfa.gov/data/datasets
baseURL: https://www.fhfa.gov/data/
properties:
- url: https://www.fhfa.gov/data/datasets
type: Documentation
- url: json-ld/fhfa-data-catalog.json
type: JSONLD
- url: conformance/fhfa-conformance.yml
type: Conformance
description: FHFA's agency data catalog, published as a Project Open Data v1.1 (DCAT-US) JSON-LD document at https://www.fhfa.gov/data/data.json.
39 datasets and 50 distributions covering the House Price Index, Federal Home Loan Bank membership, Duty to Serve, Enterprise
Housing Goals, Fair Lending, Borrower Assistance and the annual reports to Congress. Every distribution resolves to a
file (csv/xls/STATA); none declares an API endpoint.
- aid: federal-housing-finance-agency:house-price-index
name: FHFA House Price Index Data
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/federal-housing-finance-agency.png
tags:
- Housing
- Finance
humanURL: https://www.fhfa.gov/data/hpi/datasets
baseURL: https://www.fhfa.gov/hpi/download/
properties:
- url: https://www.fhfa.gov/data/hpi
type: Documentation
- url: json-schema/fhfa-hpi-master.json
type: JSONSchema
- url: examples/fhfa-hpi-master-examples.json
type: Examples
- url: data-model/fhfa-data-model.yml
type: DataModel
- url: https://www.fhfa.gov/about/fhfa-policies/api-terms-of-service
type: TermsOfService
description: The FHFA House Price Index distributed as bulk files over anonymous HTTPS GET. The master series at https://www.fhfa.gov/hpi/download/monthly/hpi_master.json
returns 186,011 observations spanning 1975 to 2026 across 472 places and 16 index variants in a single ~60 MB application/json
document. No key, no query parameters, no pagination — the whole document is served and filtered client-side. Annual,
quarterly and monthly cuts are also published as CSV, XLSX and TXT at national, state, metro, county, three-digit ZIP,
five-digit ZIP and census-tract level.
common:
- type: Support
url: https://www.fhfa.gov/contact/data-and-research
- type: PrivacyPolicy
url: https://www.fhfa.gov/about/privacy
- type: Security
url: security/fhfa-vulnerability-disclosure.yml
- type: VulnerabilityDisclosure
url: security/fhfa-vulnerability-disclosure.yml
- type: Conformance
url: conformance/fhfa-conformance.yml
- type: Conventions
url: conventions/fhfa-conventions.yml
- type: Lifecycle
url: lifecycle/fhfa-lifecycle.yml
- type: DataModel
url: data-model/fhfa-data-model.yml
- type: JSONLD
url: json-ld/fhfa-data-catalog.json
- type: JSONSchema
url: json-schema/fhfa-hpi-master.json
- type: Examples
url: examples/fhfa-hpi-master-examples.json
- type: LLMsTxt
url: llms/fhfa-llms.txt
- type: DomainSecurity
url: security/fhfa-domain-security.yml
- type: Website
url: https://www.fhfa.gov
- type: Documentation
url: https://www.fhfa.gov/data/developer-information
- type: TermsOfService
url: https://www.fhfa.gov/about/fhfa-policies/api-terms-of-service
- type: Datasets
url: https://www.fhfa.gov/data/datasets
- type: Blog
url: https://www.fhfa.gov/news
- type: LinkedIn
url: https://www.linkedin.com/company/fhfa
- type: X
url: https://x.com/FHFA
- type: GitHubOrg
url: https://github.com/fhfa
- type: Plans
url: plans/fhfa-plans-pricing.yml
- type: RateLimits
url: rate-limits/fhfa-rate-limits.yml
- type: FinOps
url: finops/fhfa-finops.yml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
Federal Housing Finance Agency (FHFA) API — frequently asked questions
Does Federal Housing Finance Agency (FHFA) have an API?
Yes. APIs.io lists 7 APIs from Federal Housing Finance Agency (FHFA), including FHFA House Price Index (HPI) API, FHFA National Mortgage Database (NMDB) API and FHFA Enterprise Public Use Database (PUDB) API, and 4 more.
How much does the Federal Housing Finance Agency (FHFA) API cost?
APIs.io lists 1 pricing plan for Federal Housing Finance Agency (FHFA), with each plan's price, limits and inclusions under Pricing on this page.
Is the Federal Housing Finance Agency (FHFA) API ready for AI agents?
Federal Housing Finance Agency (FHFA) has a Kin Score of 28.0 out of 100 (thin) and an Agent Readiness score of 1.9 (human-only), scored by API Evangelist on 2026-11-06.
Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we
store it to create your key and to recognise you if you sign in with another
provider. See our Privacy Policy and
Terms.
Kin Score
How this is scored →
It updates itself when the score changes. Paste this where you link to your API docs: