Fannie Mae

Fannie Mae, officially known as the Federal National Mortgage Association, is a government-sponsored enterprise that plays a critical role in the American housing market. Established in 1938, Fannie Mae operates as a secondary mortgage lender, purchasing mortgages from banks and other financial institutions. By buying these loans, Fannie Mae helps to provide liquidity to the mortgage market, enabling banks to lend more money to homebuyers. Fannie Mae operates a developer portal that hosts API integrations for mortgage industry partners; access typically requires authenticated business relationships.

Fannie Mae is profiled on the APIs.io network. Tagged areas include Federal-Government, Housing, Mortgages, Finance, and GSE.

Fannie Mae’s developer surface includes product news, engineering blog, documentation, getting-started guide, support, signup flow, authentication, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

32.3/100 thin ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Federal-Government Housing Mortgages Finance GSE Fortune 100

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 32.3/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 8.5 / 17

Access Clarity 2.2 / 17

Operational Transparency 4.9 / 11

Contract Governance 1.9 / 10

Discoverability 4.9 / 9

Regulatory Posture 9.2 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 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 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/.

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/fannie-mae: 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 →

Pricing Plans 1

Published pricing tiers and plan structures.

Fannie Mae Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Fannie Mae Rate Limits

0 limits

RATE LIMITS

Security Posture 3

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

Fannie Mae Authentication

4 schemes

SECURITY

Fannie Mae Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Fannie Mae Vulnerability Disclosure

Hackerone

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Fannie Mae Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Press 5

Recent news and press coverage referencing this provider.

Special Topics Archive

2026-05-25

FHFA 2025 AI Compliance Plan

2026-05-25

Fannie Mae Launches AI Fraud Detection Technology ...

2026-05-25

Fannie Mae Launches AI Fraud Detection Technology ...

2026-05-25

Mortgage Lender Sentiment Survey

2026-05-25

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Lifecycle

Lifecycle

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 4

Status, limits, changes, and where to get help

Support

StatusPage

ChangeLog

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

PrivacyPolicy

TermsOfService

TermsOfUse

Plans

Company 5

The organization behind the API

LinkedIn

Website

News

Careers

Blog

Other 5

Properties that don't map to a standard resource type

Single-Family Business

Single-Family Business

Multifamily Business

Multifamily Business

Capital Markets

Capital Markets

Data and Insights

Data and Insights

OpenIDConnect

OpenIDConnect

Source (apis.yml)

aid: fannie-mae
name: Fannie Mae
url: https://raw.githubusercontent.com/api-evangelist/fannie-mae/refs/heads/main/apis.yml
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fannie-mae.png
type: Index
access: 3rd-Party
position: Consuming
created: '2024-12-25'
modified: '2026-09-07'
specificationVersion: '0.23'
tags:
- Federal-Government
- Housing
- Mortgages
- Finance
- GSE
- Fortune 100
tags_raw:
- Federal Government
- Housing
- Mortgages
- Finance
- GSE
- Fortune 100
apis: []
common:
- type: DomainSecurity
  url: security/fannie-mae-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/fanniemae
- type: LinkedIn
  url: https://www.linkedin.com/company/fanniemae
- type: Website
  url: https://www.fanniemae.com/
- type: DeveloperPortal
  url: https://developer.fanniemae.com/
- type: Single-Family Business
  url: https://singlefamily.fanniemae.com/
- type: Multifamily Business
  url: https://multifamily.fanniemae.com/
- type: Capital Markets
  url: https://capitalmarkets.fanniemae.com/
- type: Data and Insights
  url: https://www.fanniemae.com/research-and-insights
- type: News
  url: https://www.fanniemae.com/newsroom
- type: Careers
  url: https://www.fanniemae.com/careers
- type: PrivacyPolicy
  url: https://www.fanniemae.com/about-us/corporate-governance/online-privacy-notice
- type: TermsOfService
  url: https://www.fanniemae.com/about-us/legal-disclosure
- url: https://www.fanniemae.com/newsroom
  type: Blog
- type: Documentation
  url: https://singlefamily.fanniemae.com/applications-technology/application-programming-interfaces-apis-developer-portal
- type: GettingStarted
  url: https://developer.fanniemae.com/#/get-started
- type: Support
  url: https://developer.fanniemae.com/#/support
- type: SignUp
  url: https://auth.pingone.com/4c2b23f9-52b1-4f8f-aa1f-1d477590770c/saml20/idp/startsso?spEntityId=p1c-puma-GED-p1-saml-devportal-DirectRegistration
- type: StatusPage
  url: https://singlefamily.fanniemae.com/applications-technology/technology-application-availability
- type: TermsOfUse
  url: https://www.fanniemae.com/tech-guide
- type: Authentication
  url: authentication/fannie-mae-authentication.yml
- type: OAuthScopes
  url: scopes/fannie-mae-scopes.yml
- type: OpenIDConnect
  url: https://fmsso.fanniemae.com/.well-known/openid-configuration
- type: WellKnown
  url: well-known/fannie-mae-well-known.yml
- type: Conformance
  url: conformance/fannie-mae-conformance.yml
- type: VulnerabilityDisclosure
  url: security/fannie-mae-vulnerability-disclosure.yml
- type: Security
  url: security/fannie-mae-vulnerability-disclosure.yml
- type: ChangeLog
  url: changelog/fannie-mae-changelog.yml
- type: Lifecycle
  url: lifecycle/fannie-mae-lifecycle.yml
- type: LLMsTxt
  url: llms/fannie-mae-llms.txt
- type: Plans
  url: plans/fannie-mae-plans-pricing.yml
- type: RateLimits
  url: rate-limits/fannie-mae-rate-limits.yml
description: Fannie Mae, officially known as the Federal National Mortgage Association, is a government-sponsored enterprise
  that plays a critical role in the American housing market. Established in 1938, Fannie Mae operates as a secondary mortgage
  lender, purchasing mortgages from banks and other financial institutions. By buying these loans, Fannie Mae helps to provide
  liquidity to the mortgage market, enabling banks to lend more money to homebuyers. Fannie Mae operates a developer portal
  that hosts API integrations for mortgage industry partners; access typically requires authenticated business relationships.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-09-07'
  status: enriched
  artifacts_added: 13
  pass: local-v3

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