Supabase SSO API

openapi: 3.1.0
info:
  title: Supabase Auth Admin SSO API
  description: The Supabase Auth API (based on GoTrue) is a JWT-based API for managing users and issuing access tokens. It provides endpoints for user signup, signin with email/password, magic links, one-time passwords, OAuth social login, token refresh, user management, multi-factor authentication, and SAML-based single sign-on. When deployed on Supabase, the server requires an apikey header containing a valid Supabase-issued API key.
  version: 2.0.0
  contact:
    name: Supabase Support
    url: https://supabase.com/support
  termsOfService: https://supabase.com/terms
servers:
- url: https://{project_ref}.supabase.co/auth/v1
  description: Supabase Project Auth Server
  variables:
    project_ref:
      description: Your Supabase project reference ID
      default: your-project-ref
security:
- apiKeyAuth: []
tags:
- name: SSO
  description: SAML-based single sign-on endpoints.
paths:
  /sso/saml/acs:
    post:
      operationId: samlAcs
      summary: SAML Assertion Consumer Service
      description: Receives the SAML assertion from an identity provider after successful authentication. This endpoint processes the assertion and creates or updates the user session.
      tags:
      - SSO
      responses:
        '303':
          description: Redirect to application with session
        '400':
          description: Invalid SAML assertion
components:
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: apikey
      description: Supabase project API key (anon key for public operations, service_role key for admin operations).
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: JWT access token obtained from a successful authentication.
externalDocs:
  description: Supabase Auth Documentation
  url: https://supabase.com/docs/guides/auth