Clerk Sign-ups & Tokens API

openapi: 3.2.0
info:
  title: Clerk Backend Allowlist & Blocklist Sign-ups & Tokens API
  description: 'The Clerk Backend API manages Clerk''s authentication and user management resources server-side: users, organizations and memberships, sessions, clients, sign-ups, JWT templates, JWKS, email/SMS verification and templates, allowlist/blocklist identifiers, invitations, SAML/enterprise connections, OAuth applications, and Svix-powered webhooks. The base URL is https://api.clerk.com/v1 and every request (except GET /jwks and the public interstitial) is authenticated with your instance Secret Key passed as `Authorization: Bearer sk_...`. This description is grounded in Clerk''s published OpenAPI spec (github.com/clerk/openapi-specs, bapi) but is a curated subset covering the primary resource groups; it does not enumerate every parameter or schema property. Verify the current version-dated spec on GitHub for the authoritative contract.'
  version: '2026-05-12'
  contact:
    name: Clerk
    url: https://clerk.com
  license:
    name: Clerk Documentation
    url: https://clerk.com/docs
servers:
- url: https://api.clerk.com/v1
  description: Clerk Backend API
security:
- bearerAuth: []
tags:
- name: Sign-ups & Tokens
  description: Sign-up attempts, sign-in tokens, and actor tokens.
paths:
  /sign_ups/{id}:
    parameters:
    - name: id
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: getSignUp
      tags:
      - Sign-ups & Tokens
      summary: Retrieve a sign-up
      responses:
        '200':
          description: The requested sign-up attempt.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
    patch:
      operationId: updateSignUp
      tags:
      - Sign-ups & Tokens
      summary: Update a sign-up
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: The updated sign-up attempt.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
  /sign_in_tokens:
    post:
      operationId: createSignInToken
      tags:
      - Sign-ups & Tokens
      summary: Create a sign-in token
      description: Creates a single-use, time-limited token that authenticates a user without a password.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - user_id
              properties:
                user_id:
                  type: string
                expires_in_seconds:
                  type: integer
      responses:
        '200':
          description: The created sign-in token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SignInToken'
  /sign_in_tokens/{sign_in_token_id}/revoke:
    parameters:
    - name: sign_in_token_id
      in: path
      required: true
      schema:
        type: string
    post:
      operationId: revokeSignInToken
      tags:
      - Sign-ups & Tokens
      summary: Revoke a sign-in token
      responses:
        '200':
          description: The revoked sign-in token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SignInToken'
  /actor_tokens:
    post:
      operationId: createActorToken
      tags:
      - Sign-ups & Tokens
      summary: Create an actor token
      description: Creates a token allowing an actor (impersonator) to sign in as another user.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - user_id
              - actor
              properties:
                user_id:
                  type: string
                actor:
                  type: object
                  additionalProperties: true
      responses:
        '200':
          description: The created actor token.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
  /actor_tokens/{actor_token_id}/revoke:
    parameters:
    - name: actor_token_id
      in: path
      required: true
      schema:
        type: string
    post:
      operationId: revokeActorToken
      tags:
      - Sign-ups & Tokens
      summary: Revoke an actor token
      responses:
        '200':
          description: The revoked actor token.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
components:
  schemas:
    SignInToken:
      type: object
      properties:
        id:
          type: string
        object:
          type: string
        user_id:
          type: string
        token:
          type: string
        status:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Your Clerk instance Secret Key (starts with sk_test_ or sk_live_) passed as `Authorization: Bearer YOUR_SECRET_KEY`.'