Login.gov

Login.gov is the U.S. federal government's secure single sign-on and identity verification service for the public, operated by the General Services Administration's Technology Transformation Services (GSA TTS). Relying parties — federal, and in some cases state and local — federate user authentication to Login.gov via OpenID Connect (iGov profile) or SAML 2.0, with support for IAL1 (auth-only) and IAL2 (identity-verified) assurance and AAL2 multi-factor authentication including phishing-resistant and PIV/CAC authenticators.

Login.gov publishes 7 API contracts indexed on the APIs.io network, including Authentication API, Authorization API, Discovery API, and 4 more. Tagged areas include Government, Federal, GSA, Identity, and Authentication.

The Login.gov catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Login.gov’s developer surface includes authentication, developer portal, documentation, signup flow, getting-started guide, sandbox, engineering blog, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

46.9/100 developing ▬ flat Agent 20/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

2 published contracts 14 Features

Government Federal GSA Identity Authentication SSO OpenID Connect SAMLIAL2AAL2Identity Federation

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Application Identity & Verification

AE-160

AuthorizationUser Info

GET /openid_connect/authorize GET /api/openid_connect/userinfo

Citizen & Constituent Service Management

BC-3220

Authentication

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 46.9/100 · developing

Contract Quality 10.6 / 19

Developer Ergonomics 7.5 / 15

Access Clarity 4.3 / 15

Operational Transparency 4.4 / 10

Contract Governance 2.5 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.0 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/login-gov/"><img src="https://apis.io/badge/login-gov/card.svg" alt="Login.gov 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 28.9 — up to +14.2 composite points
Contract Quality scores 56.7 — up to +10.8 composite points
Developer Ergonomics scores 50.0 — up to +10.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/login-gov/apis.yml: open an issue on github.com/api-evangelist/login-gov to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

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.

Market	Position	Depth	Registered MCP server	Declares compatibility
US Federal API Programs (api.data.gov, Login.gov, GSA MAS, FedRAMP)	gravity	51.8	-	-

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.

Standards implemented 4

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenID Connect

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

SAML

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

SSO

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 7

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

Login.gov Authentication API

SAML SSO request endpoint.

Login.gov Authorization API

OAuth 2.0 authorization endpoint where the user authenticates.

Login.gov Discovery API

OIDC discovery and public key endpoints.

Login.gov Logout API

RP-initiated logout and session termination.

Login.gov Metadata API

SAML 2.0 IdP metadata.

Login.gov Token API

Token exchange using private_key_jwt or PKCE.

Login.gov User Info API

User attribute retrieval with a bearer access token.

Scroll for all 7

Open Collections 9

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Login.gov OpenID Connect Authentication API

OPEN COLLECTION

Login.gov OpenID Connect Authentication Authorization API

OPEN COLLECTION

Login.gov OpenID Connect Authentication Discovery API

OPEN COLLECTION

Login.gov OpenID Connect Authentication Logout API

OPEN COLLECTION

Login.gov OpenID Connect Authentication Metadata API

OPEN COLLECTION

Login.gov OpenID Connect API

OPEN COLLECTION

Login.gov SAML 2.0 API

OPEN COLLECTION

Login.gov OpenID Connect Authentication Token API

OPEN COLLECTION

Login.gov OpenID Connect Authentication UserInfo API

OPEN COLLECTION

Scroll for all 9

Login.gov API pricing

Not yet checked against Login.gov's own pricing page. Compiled by API Evangelist from developers.login.gov; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Sandbox	Free
Production (Interagency Agreement)	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Login Gov Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Login Gov Rate Limits

0 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Login.gov

SLA

Features 14

Notable capabilities this provider offers.

Single account for the public to access participating federal services

OpenID Connect (iGov profile) and SAML 2.0 federation

Authorization code flow with private_key_jwt or PKCE; implicit flow not supported

IAL1 (authentication only) and IAL2 (identity-verified) assurance levels

AAL2 with TOTP, SMS/voice, push, security keys, PIV/CAC, and platform passkeys

Phishing-resistant AAL2 variant and HSPD-12 (PIV/CAC) AAL2 variant

Identity proofing with optional facial-match step

Self-service Partner Portal (sandbox and production) for client registration and scope/cert management

JWKS endpoint with at-least-annual key rotation; SAML certs rotated yearly with year-versioned endpoints

{"User attributes scoped per OIDC scope/SAML attribute" => "email, all_emails, name, address, birthdate, phone, SSN, verified_at, locale, x509 subject/issuer/presented"}

{"Built and operated in the open" => "identity-idp (Ruby on Rails) and sample SP apps published under github.com/18F"}

English, Spanish, and French locales

Section 508 accessibility commitment; published privacy policy and PIA

Cost-recoverable funding model via Interagency Agreement (IAA); no public rate card

Scroll for all 14

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Login Gov Context

29 classes · 4 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Login.gov — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

Login.gov API Rules

7 rules · 5 errors 2 warnings

SPECTRAL

JSON Schema 2

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

Login.gov ID Token Claims

11 properties

JSON SCHEMA

Login.gov UserInfo

19 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

Login Gov Token Exchange Example

2 fields

EXAMPLE

Login Gov Userinfo Ial1 Example

9 fields

EXAMPLE

Login Gov Userinfo Ial2 Example

16 fields

EXAMPLE

Security Posture 3

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

Login Gov Authentication

http · 1 scheme

SECURITY

Login Gov Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Login Gov Vulnerability Disclosure

Hackerone · security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Login Gov Agentic Access

9 operations · 2 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

Portal

Signup

GettingStarted

Sandbox

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Vocabulary

Vocabulary

Build 5

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

GitHubOrganization

GitHubRepository

GitHubRepository

GitHubRepository

Access & Security 4

Authentication, authorization, and security posture

SecurityPolicy

SecurityPolicy

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 5

Status, limits, changes, and where to get help

IssueTracker

Releases

StatusPage

Contact

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Privacy

Privacy

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

BusinessInquiries

BusinessInquiries

Accessibility

Accessibility

Source (apis.yml)

aid: login-gov
name: Login.gov
description: Login.gov is the U.S. federal government's secure single sign-on and identity verification service for the public,
  operated by the General Services Administration's Technology Transformation Services (GSA TTS). Relying parties — federal,
  and in some cases state and local — federate user authentication to Login.gov via OpenID Connect (iGov profile) or SAML
  2.0, with support for IAL1 (auth-only) and IAL2 (identity-verified) assurance and AAL2 multi-factor authentication including
  phishing-resistant and PIV/CAC authenticators.
type: Index
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - 18f/identity-idp
    - 18f/identity-oidc-sinatra
    - 18f/identity-saml-sinatra
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/login-gov.png
tags:
- Government
- Federal
- GSA
- Identity
- Authentication
- SSO
- OpenID Connect
- SAML
- IAL2
- AAL2
- Identity Federation
tags_raw:
- Government
- Federal
- GSA
- Identity
- Authentication
- SSO
- OIDC
- SAML
- IAL2
- AAL2
- Identity Federation
created: '2026-05-25'
modified: '2026-09-16'
url: https://raw.githubusercontent.com/api-evangelist/login-gov/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: login-gov:login-gov-authentication-api
  name: Login.gov Authentication API
  description: SAML SSO request endpoint.
  humanURL: https://developers.login.gov/oidc/
  baseURL: https://secure.login.gov
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/login-gov-authentication-api-openapi.yml
  - type: Documentation
    url: https://developers.login.gov/oidc/
  - type: Documentation
    url: https://developers.login.gov/oidc/getting-started/
  - type: Documentation
    url: https://developers.login.gov/oidc/authorization/
  - type: Documentation
    url: https://developers.login.gov/oidc/token/
  - type: Documentation
    url: https://developers.login.gov/oidc/user-info/
  - type: Documentation
    url: https://developers.login.gov/oidc/logout/
  - type: Documentation
    url: https://developers.login.gov/oidc/certificates/
  - type: Signup
    url: https://portal.int.identitysandbox.gov
  - type: JSONSchema
    url: json-schema/login-gov-userinfo-schema.json
  - type: JSONSchema
    url: json-schema/login-gov-id-token-schema.json
  - type: JSONLD
    url: json-ld/login-gov-context.jsonld
  - type: SpectralRuleset
    url: rules/login-gov-rules.yml
  - type: Documentation
    url: https://developers.login.gov/saml/
  - type: Documentation
    url: https://developers.login.gov/saml/getting-started/
- aid: login-gov:login-gov-authorization-api
  name: Login.gov Authorization API
  description: OAuth 2.0 authorization endpoint where the user authenticates.
  humanURL: https://developers.login.gov/oidc/
  baseURL: https://secure.login.gov
  tags:
  - Authorization
  properties:
  - type: OpenAPI
    url: openapi/login-gov-authorization-api-openapi.yml
  - type: Documentation
    url: https://developers.login.gov/oidc/
  - type: Documentation
    url: https://developers.login.gov/oidc/getting-started/
  - type: Documentation
    url: https://developers.login.gov/oidc/authorization/
  - type: Documentation
    url: https://developers.login.gov/oidc/token/
  - type: Documentation
    url: https://developers.login.gov/oidc/user-info/
  - type: Documentation
    url: https://developers.login.gov/oidc/logout/
  - type: Documentation
    url: https://developers.login.gov/oidc/certificates/
  - type: Signup
    url: https://portal.int.identitysandbox.gov
  - type: JSONSchema
    url: json-schema/login-gov-userinfo-schema.json
  - type: JSONSchema
    url: json-schema/login-gov-id-token-schema.json
  - type: JSONLD
    url: json-ld/login-gov-context.jsonld
  - type: SpectralRuleset
    url: rules/login-gov-rules.yml
  - type: Documentation
    url: https://developers.login.gov/saml/
  - type: Documentation
    url: https://developers.login.gov/saml/getting-started/
- aid: login-gov:login-gov-discovery-api
  name: Login.gov Discovery API
  description: OIDC discovery and public key endpoints.
  humanURL: https://developers.login.gov/oidc/
  baseURL: https://secure.login.gov
  tags:
  - Discovery
  properties:
  - type: OpenAPI
    url: openapi/login-gov-discovery-api-openapi.yml
  - type: Documentation
    url: https://developers.login.gov/oidc/
  - type: Documentation
    url: https://developers.login.gov/oidc/getting-started/
  - type: Documentation
    url: https://developers.login.gov/oidc/authorization/
  - type: Documentation
    url: https://developers.login.gov/oidc/token/
  - type: Documentation
    url: https://developers.login.gov/oidc/user-info/
  - type: Documentation
    url: https://developers.login.gov/oidc/logout/
  - type: Documentation
    url: https://developers.login.gov/oidc/certificates/
  - type: Signup
    url: https://portal.int.identitysandbox.gov
  - type: JSONSchema
    url: json-schema/login-gov-userinfo-schema.json
  - type: JSONSchema
    url: json-schema/login-gov-id-token-schema.json
  - type: JSONLD
    url: json-ld/login-gov-context.jsonld
  - type: SpectralRuleset
    url: rules/login-gov-rules.yml
  - type: Documentation
    url: https://developers.login.gov/saml/
  - type: Documentation
    url: https://developers.login.gov/saml/getting-started/
- aid: login-gov:login-gov-logout-api
  name: Login.gov Logout API
  description: RP-initiated logout and session termination.
  humanURL: https://developers.login.gov/oidc/
  baseURL: https://secure.login.gov
  tags:
  - Logout
  properties:
  - type: OpenAPI
    url: openapi/login-gov-logout-api-openapi.yml
  - type: Documentation
    url: https://developers.login.gov/oidc/
  - type: Documentation
    url: https://developers.login.gov/oidc/getting-started/
  - type: Documentation
    url: https://developers.login.gov/oidc/authorization/
  - type: Documentation
    url: https://developers.login.gov/oidc/token/
  - type: Documentation
    url: https://developers.login.gov/oidc/user-info/
  - type: Documentation
    url: https://developers.login.gov/oidc/logout/
  - type: Documentation
    url: https://developers.login.gov/oidc/certificates/
  - type: Signup
    url: https://portal.int.identitysandbox.gov
  - type: JSONSchema
    url: json-schema/login-gov-userinfo-schema.json
  - type: JSONSchema
    url: json-schema/login-gov-id-token-schema.json
  - type: JSONLD
    url: json-ld/login-gov-context.jsonld
  - type: SpectralRuleset
    url: rules/login-gov-rules.yml
  - type: Documentation
    url: https://developers.login.gov/saml/
  - type: Documentation
    url: https://developers.login.gov/saml/getting-started/
- aid: login-gov:login-gov-metadata-api
  name: Login.gov Metadata API
  description: SAML 2.0 IdP metadata.
  humanURL: https://developers.login.gov/oidc/
  baseURL: https://secure.login.gov
  tags:
  - Metadata
  properties:
  - type: OpenAPI
    url: openapi/login-gov-metadata-api-openapi.yml
  - type: Documentation
    url: https://developers.login.gov/oidc/
  - type: Documentation
    url: https://developers.login.gov/oidc/getting-started/
  - type: Documentation
    url: https://developers.login.gov/oidc/authorization/
  - type: Documentation
    url: https://developers.login.gov/oidc/token/
  - type: Documentation
    url: https://developers.login.gov/oidc/user-info/
  - type: Documentation
    url: https://developers.login.gov/oidc/logout/
  - type: Documentation
    url: https://developers.login.gov/oidc/certificates/
  - type: Signup
    url: https://portal.int.identitysandbox.gov
  - type: JSONSchema
    url: json-schema/login-gov-userinfo-schema.json
  - type: JSONSchema
    url: json-schema/login-gov-id-token-schema.json
  - type: JSONLD
    url: json-ld/login-gov-context.jsonld
  - type: SpectralRuleset
    url: rules/login-gov-rules.yml
  - type: Documentation
    url: https://developers.login.gov/saml/
  - type: Documentation
    url: https://developers.login.gov/saml/getting-started/
- aid: login-gov:login-gov-token-api
  name: Login.gov Token API
  description: Token exchange using private_key_jwt or PKCE.
  humanURL: https://developers.login.gov/oidc/
  baseURL: https://secure.login.gov
  tags:
  - Tokens
  tags_raw:
  - Token
  properties:
  - type: OpenAPI
    url: openapi/login-gov-token-api-openapi.yml
  - type: Documentation
    url: https://developers.login.gov/oidc/
  - type: Documentation
    url: https://developers.login.gov/oidc/getting-started/
  - type: Documentation
    url: https://developers.login.gov/oidc/authorization/
  - type: Documentation
    url: https://developers.login.gov/oidc/token/
  - type: Documentation
    url: https://developers.login.gov/oidc/user-info/
  - type: Documentation
    url: https://developers.login.gov/oidc/logout/
  - type: Documentation
    url: https://developers.login.gov/oidc/certificates/
  - type: Signup
    url: https://portal.int.identitysandbox.gov
  - type: JSONSchema
    url: json-schema/login-gov-userinfo-schema.json
  - type: JSONSchema
    url: json-schema/login-gov-id-token-schema.json
  - type: JSONLD
    url: json-ld/login-gov-context.jsonld
  - type: SpectralRuleset
    url: rules/login-gov-rules.yml
  - type: Documentation
    url: https://developers.login.gov/saml/
  - type: Documentation
    url: https://developers.login.gov/saml/getting-started/
- aid: login-gov:login-gov-user-info-api
  name: Login.gov User Info API
  description: User attribute retrieval with a bearer access token.
  humanURL: https://developers.login.gov/oidc/
  baseURL: https://secure.login.gov
  tags:
  - UserInfo
  tags_raw:
  - User Info
  properties:
  - type: OpenAPI
    url: openapi/login-gov-user-info-api-openapi.yml
  - type: Documentation
    url: https://developers.login.gov/oidc/
  - type: Documentation
    url: https://developers.login.gov/oidc/getting-started/
  - type: Documentation
    url: https://developers.login.gov/oidc/authorization/
  - type: Documentation
    url: https://developers.login.gov/oidc/token/
  - type: Documentation
    url: https://developers.login.gov/oidc/user-info/
  - type: Documentation
    url: https://developers.login.gov/oidc/logout/
  - type: Documentation
    url: https://developers.login.gov/oidc/certificates/
  - type: Signup
    url: https://portal.int.identitysandbox.gov
  - type: JSONSchema
    url: json-schema/login-gov-userinfo-schema.json
  - type: JSONSchema
    url: json-schema/login-gov-id-token-schema.json
  - type: JSONLD
    url: json-ld/login-gov-context.jsonld
  - type: SpectralRuleset
    url: rules/login-gov-rules.yml
  - type: Documentation
    url: https://developers.login.gov/saml/
  - type: Documentation
    url: https://developers.login.gov/saml/getting-started/
common:
- type: CapabilityMap
  url: capabilities/login-gov-capability-edges.yml
  name: Login.gov Business Capability Map
- type: IssueTracker
  url: https://github.com/18F/identity-idp/issues
- type: Releases
  url: https://github.com/18F/identity-idp/releases
- type: SecurityPolicy
  url: https://github.com/18F/identity-idp/blob/main/docs/SECURITY.md
- type: CodeOfConduct
  url: https://github.com/18F/.github/blob/master/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/18F/identity-idp/blob/main/CONTRIBUTING.md
- type: AgenticAccess
  url: agentic-access/login-gov-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/login-gov-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/login-gov-domain-security.yml
- type: Authentication
  url: authentication/login-gov-authentication.yml
- type: Website
  url: https://www.login.gov
- type: Portal
  url: https://www.login.gov/partners
- type: Documentation
  url: https://developers.login.gov
- type: Signup
  url: https://www.login.gov/partners/get-started/
- type: GettingStarted
  url: https://developers.login.gov/oidc/getting-started/
- type: Sandbox
  url: https://portal.int.identitysandbox.gov
- type: GitHubOrganization
  url: https://github.com/18F
- type: GitHubRepository
  name: identity-idp
  url: https://github.com/18F/identity-idp
- type: GitHubRepository
  name: identity-oidc-sinatra (sample relying party)
  url: https://github.com/18F/identity-oidc-sinatra
- type: GitHubRepository
  name: identity-saml-sinatra (sample relying party)
  url: https://github.com/18F/identity-saml-sinatra
- type: StatusPage
  url: https://status.login.gov
- type: Blog
  url: https://www.login.gov/about/news/
- type: Contact
  url: https://www.login.gov/contact/
- type: BusinessInquiries
  url: https://www.login.gov/partners/business-inquiries/
- type: Privacy
  url: https://www.login.gov/policy/
- type: Accessibility
  url: https://www.login.gov/accessibility/
- type: Plans
  url: plans/login-gov-plans-pricing.yml
- type: RateLimits
  url: rate-limits/login-gov-rate-limits.yml
- type: Vocabulary
  url: vocabulary/login-gov-vocabulary.yml
- type: Features
  data:
  - Single account for the public to access participating federal services
  - OpenID Connect (iGov profile) and SAML 2.0 federation
  - Authorization code flow with private_key_jwt or PKCE; implicit flow not supported
  - IAL1 (authentication only) and IAL2 (identity-verified) assurance levels
  - AAL2 with TOTP, SMS/voice, push, security keys, PIV/CAC, and platform passkeys
  - Phishing-resistant AAL2 variant and HSPD-12 (PIV/CAC) AAL2 variant
  - Identity proofing with optional facial-match step
  - Self-service Partner Portal (sandbox and production) for client registration and scope/cert management
  - JWKS endpoint with at-least-annual key rotation; SAML certs rotated yearly with year-versioned endpoints
  - User attributes scoped per OIDC scope/SAML attribute: email, all_emails, name, address, birthdate, phone, SSN, verified_at,
      locale, x509 subject/issuer/presented
  - Built and operated in the open: identity-idp (Ruby on Rails) and sample SP apps published under github.com/18F
  - English, Spanish, and French locales
  - Section 508 accessibility commitment; published privacy policy and PIA
  - Cost-recoverable funding model via Interagency Agreement (IAA); no public rate card
maintainers:
- FN: Kin Lane
  email: info@apievangelist.com
  X: apievangelist
  url: https://apievangelist.com

Login.gov API — frequently asked questions

Does Login.gov have an API?

Yes. APIs.io lists 7 APIs from Login.gov, including Login.gov Authentication API, Login.gov Authorization API and Login.gov Discovery API, and 4 more.

Is there an OpenAPI specification for the Login.gov API?

Yes. APIs.io indexes 7 OpenAPI specifications for Login.gov, each linked for download from this page.

How do I authenticate with the Login.gov API?

Login.gov uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Login Gov Authentication.

How much does the Login.gov API cost?

APIs.io lists 2 pricing plans for Login.gov, with each plan's price, limits and inclusions under Pricing on this page.

Is the Login.gov API ready for AI agents?

Login.gov has a Kin Score of 46.9 out of 100 (developing) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/login-gov"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/login-gov/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/login-gov/evidence"

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.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.