SAML website screenshot

SAML

SAML (Security Assertion Markup Language) is an XML-based open standard for exchanging authentication and authorization data between identity providers and service providers. Ratified as an OASIS Standard in March 2005, SAML 2.0 enables single sign-on (SSO) across different applications and domains, reducing the need for users to manage multiple sets of credentials. It uses XML digital signatures and encryption to secure assertions exchanged between Identity Providers (IdP) and Service Providers (SP).

SAML publishes 3 APIs on the APIs.io network: Metadata API, SLO API, and SSO API. Tagged areas include Authentication, Authorization, Federation, Identity Management, and Open Standard.

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

SAML’s developer surface includes documentation, code examples, and 12 more developer resources.

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43.1/100 developing ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
3 APIs
AuthenticationAuthorizationFederationIdentity ManagementOpen StandardSecuritySingle Sign-OnSSOXML

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 43.1/100 · developing
Contract Quality 15.4 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 8.3 / 12
Discoverability 5.7 / 10
Agent readiness — 25/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 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/saml: 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 3

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

SAML Metadata API

SAML 2.0 metadata retrieval.

SAML SLO API

SAML 2.0 Single Logout operations.

SAML SSO API

SAML 2.0 Single Sign-On operations.

Open Collections 1

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

SAML 2.0 SSO HTTP Bindings

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Saml Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Saml Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Saml Finops

FINOPS

Semantic Vocabularies 1

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

Saml Context

7 classes · 35 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

SAML API Rules

6 rules · 4 warnings 2 info

SPECTRAL

SAML API Rules

9 rules · 2 errors 5 warnings 2 info

SPECTRAL

JSON Schema 3

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

SAML 2.0 Assertion

8 properties

JSON SCHEMA

SAML 2.0 AuthnRequest

13 properties

JSON SCHEMA

SAML 2.0 EntityDescriptor Metadata

8 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Saml Assertion Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

Saml Sso Redirect Example

4 fields

EXAMPLE

Agentic Access 1

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

Saml Agentic Access

5 operations · 2 acting

5 operations · 2 acting

AGENTIC

Resources

Documentation 8

Reference material describing how the API behaves

SAML 2.0 OASIS Standard
Documentation
 SAML 2.0 Technical Overview
Documentation
 SAML 2.0 Core Specification
Documentation
 SAML 2.0 Bindings Specification
Documentation
 SAML 2.0 Profiles Specification
Documentation
 SAML 2.0 EntityDescriptor Metadata
JSONSchema
 SAML 2.0 AuthnRequest
JSONSchema
 SAML 2.0 Assertion
JSONSchema

Scroll for all 8

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

SAML 2.0 JSON-LD Context
JSONLDContext
 SAML 2.0 Assertion Structure
JSONStructure
 SAML API Spectral Rules
SpectralRules
 SAML 2.0 Vocabulary
Vocabulary

Build 1

SDKs, sample code, and the tooling you integrate with

SAML SSO HTTP Redirect Binding Example
Examples

Source (apis.yml)

apis.yml Raw ↑ 
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/saml.png
name: SAML
description: SAML (Security Assertion Markup Language) is an XML-based open standard for exchanging authentication and authorization
  data between identity providers and service providers. Ratified as an OASIS Standard in March 2005, SAML 2.0 enables single
  sign-on (SSO) across different applications and domains, reducing the need for users to manage multiple sets of credentials.
  It uses XML digital signatures and encryption to secure assertions exchanged between Identity Providers (IdP) and Service
  Providers (SP).
url: https://www.oasis-open.org/standard/saml/
tags:
- Authentication
- Authorization
- Federation
- Identity Management
- Open Standard
- Security
- Single Sign-On
- SSO
- XML
created: '2025-01-01'
modified: '2026-05-19'
apis:
- aid: saml:saml-metadata-api
  name: SAML Metadata API
  description: SAML 2.0 metadata retrieval.
  tags:
  - Metadata
  properties:
  - type: OpenAPI
    url: openapi/saml-metadata-api-openapi.yml
  - type: Documentation
    url: https://docs.oasis-open.org/security/saml/v2.0/saml-bindings-2.0-os.pdf
- aid: saml:saml-slo-api
  name: SAML SLO API
  description: SAML 2.0 Single Logout operations.
  tags:
  - SLO
  properties:
  - type: OpenAPI
    url: openapi/saml-slo-api-openapi.yml
  - type: Documentation
    url: https://docs.oasis-open.org/security/saml/v2.0/saml-bindings-2.0-os.pdf
- aid: saml:saml-sso-api
  name: SAML SSO API
  description: SAML 2.0 Single Sign-On operations.
  tags:
  - SSO
  properties:
  - type: OpenAPI
    url: openapi/saml-sso-api-openapi.yml
  - type: Documentation
    url: https://docs.oasis-open.org/security/saml/v2.0/saml-bindings-2.0-os.pdf
common:
- type: AgenticAccess
  url: agentic-access/saml-agentic-access.yml
- type: Documentation
  url: https://www.oasis-open.org/standard/saml/
  title: SAML 2.0 OASIS Standard
- type: Documentation
  url: https://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-tech-overview-2.0.html
  title: SAML 2.0 Technical Overview
- type: Documentation
  url: https://docs.oasis-open.org/security/saml/v2.0/saml-core-2.0-os.pdf
  title: SAML 2.0 Core Specification
- type: Documentation
  url: https://docs.oasis-open.org/security/saml/v2.0/saml-bindings-2.0-os.pdf
  title: SAML 2.0 Bindings Specification
- type: Documentation
  url: https://docs.oasis-open.org/security/saml/v2.0/saml-profiles-2.0-os.pdf
  title: SAML 2.0 Profiles Specification
- type: JSONSchema
  url: json-schema/saml-entity-descriptor.json
  title: SAML 2.0 EntityDescriptor Metadata
- type: JSONSchema
  url: json-schema/saml-authn-request.json
  title: SAML 2.0 AuthnRequest
- type: JSONSchema
  url: json-schema/saml-assertion.json
  title: SAML 2.0 Assertion
- type: JSONLDContext
  url: json-ld/saml-context.jsonld
  title: SAML 2.0 JSON-LD Context
- type: JSONStructure
  url: json-structure/saml-assertion-structure.json
  title: SAML 2.0 Assertion Structure
- type: SpectralRules
  url: rules/saml-rules.yml
  title: SAML API Spectral Rules
- type: Examples
  url: examples/saml-sso-redirect-example.json
  title: SAML SSO HTTP Redirect Binding Example
- type: Vocabulary
  url: vocabulary/saml-vocabulary.yml
  title: SAML 2.0 Vocabulary