thirdweb Authentication API

openapi: 3.0.1
info:
  title: thirdweb Authentication API
  description: thirdweb provides a unified interface for Web3 development. This specification documents real, publicly documented HTTP endpoints across the thirdweb unified API (api.thirdweb.com - wallets, transactions, contracts, tokens, payments and bridge), Engine (backend transaction execution), Insight (indexed on-chain data) and Nebula (AI blockchain interface). Authenticate frontend usage with an x-client-id header (plus x-bundle-id for native apps) or a Bearer JWT, and backend usage with an x-secret-key header.
  termsOfService: https://thirdweb.com/tos
  contact:
    name: thirdweb Support
    url: https://thirdweb.com/support
  version: '1.22'
servers:
- url: https://api.thirdweb.com
  description: thirdweb unified API (wallets, transactions, contracts, tokens, payments, bridge)
- url: https://engine.thirdweb.com
  description: thirdweb Engine (backend transaction execution)
- url: https://insight.thirdweb.com
  description: thirdweb Insight (indexed on-chain data)
- url: https://nebula-api.thirdweb.com
  description: thirdweb Nebula (AI blockchain interface)
security:
- SecretKeyAuth: []
- ClientAuth: []
- BearerAuth: []
tags:
- name: Authentication
  description: Wallet authentication flows.
paths:
  /v1/auth/initiate:
    post:
      operationId: initiateAuth
      tags:
      - Authentication
      summary: Initiate a wallet authentication flow.
      description: Starts an authentication flow (email, phone, OAuth, or SIWE) and triggers any verification step such as an OTP.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AuthInitiateRequest'
      responses:
        '200':
          description: Authentication initiated.
  /v1/auth/complete:
    post:
      operationId: completeAuth
      tags:
      - Authentication
      summary: Complete a wallet authentication flow.
      description: Completes authentication by verifying the challenge and returns a JWT access token and wallet address.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AuthCompleteRequest'
      responses:
        '200':
          description: Authenticated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AuthResult'
components:
  schemas:
    AuthInitiateRequest:
      type: object
      properties:
        method:
          type: string
          description: Authentication method (e.g. email, phone, siwe, an OAuth provider).
        email:
          type: string
        phone:
          type: string
      required:
      - method
    AuthCompleteRequest:
      type: object
      properties:
        method:
          type: string
        code:
          type: string
          description: Verification code or signed payload completing the challenge.
      required:
      - method
    AuthResult:
      type: object
      properties:
        token:
          type: string
          description: JWT access token.
        walletAddress:
          type: string
        isNewUser:
          type: boolean
  securitySchemes:
    ClientAuth:
      type: apiKey
      in: header
      name: x-client-id
      description: Client ID for frontend usage. Web sends x-client-id only; native apps also send x-bundle-id.
    BundleIdAuth:
      type: apiKey
      in: header
      name: x-bundle-id
      description: Bundle ID for native (desktop/mobile) platform authentication alongside x-client-id.
    SecretKeyAuth:
      type: apiKey
      in: header
      name: x-secret-key
      description: Secret key for backend usage; never expose publicly.
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: JWT access token obtained from wallet authentication, for frontend usage.