openapi: 3.0.3 info: title: Clerk Backend Allowlist & Blocklist 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: Allowlist & Blocklist description: Identifiers permitted or denied from signing up. paths: /allowlist_identifiers: get: operationId: listAllowlistIdentifiers tags: - Allowlist & Blocklist summary: List all allowlist identifiers responses: '200': description: A list of allowlist identifiers. content: application/json: schema: type: array items: $ref: '#/components/schemas/Identifier' post: operationId: createAllowlistIdentifier tags: - Allowlist & Blocklist summary: Add an allowlist identifier requestBody: required: true content: application/json: schema: type: object required: - identifier properties: identifier: type: string notify: type: boolean responses: '200': description: The created identifier. content: application/json: schema: $ref: '#/components/schemas/Identifier' /allowlist_identifiers/{identifier_id}: parameters: - name: identifier_id in: path required: true schema: type: string delete: operationId: deleteAllowlistIdentifier tags: - Allowlist & Blocklist summary: Delete an allowlist identifier responses: '200': description: Deletion confirmation. content: application/json: schema: $ref: '#/components/schemas/DeletedObject' /blocklist_identifiers: get: operationId: listBlocklistIdentifiers tags: - Allowlist & Blocklist summary: List all blocklist identifiers responses: '200': description: A list of blocklist identifiers. content: application/json: schema: type: array items: $ref: '#/components/schemas/Identifier' post: operationId: createBlocklistIdentifier tags: - Allowlist & Blocklist summary: Add a blocklist identifier requestBody: required: true content: application/json: schema: type: object required: - identifier properties: identifier: type: string responses: '200': description: The created identifier. content: application/json: schema: $ref: '#/components/schemas/Identifier' /blocklist_identifiers/{identifier_id}: parameters: - name: identifier_id in: path required: true schema: type: string delete: operationId: deleteBlocklistIdentifier tags: - Allowlist & Blocklist summary: Delete a blocklist identifier responses: '200': description: Deletion confirmation. content: application/json: schema: $ref: '#/components/schemas/DeletedObject' components: schemas: Identifier: type: object properties: id: type: string object: type: string identifier: type: string identifier_type: type: string created_at: type: integer DeletedObject: type: object properties: object: type: string id: type: string deleted: type: boolean 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`.'