openapi: 3.0.1
info:
  title: Prove Auth Authentication API
  description: 'Phone-centric identity verification and authentication API. The Prove API (v3) uses a consumer''s mobile phone number and cryptographic possession signals to power the Pre-Fill verification flow (start, validate, challenge, complete), Unified Authentication / Trust Score (unify, unify-bind, unify-status), identity discovery (discover, fetch), phone-based Auth, and a persistent Identity Manager. All endpoints are OAuth 2.0 (client-credentials) secured; obtain a Bearer access token from the /token endpoint and send it as `Authorization: Bearer <token>` on every subsequent request.'
  termsOfService: https://www.prove.com/legal/terms
  contact:
    name: Prove Developer Support
    url: https://developer.prove.com
  version: '3.0'
servers:
- url: https://api.prove.com/v3
  description: Production
- url: https://platform.proveapis.com/v3
  description: Production (platform host)
- url: https://platform.uat.proveapis.com/v3
  description: UAT / Sandbox
security:
- bearerAuth: []
tags:
- name: Authentication
  description: OAuth 2.0 token issuance.
paths:
  /token:
    post:
      operationId: v3TokenRequest
      tags:
      - Authentication
      summary: Issue an OAuth 2.0 access token
      description: 'Exchange a client ID and client secret for a short-lived Bearer access token using the OAuth 2.0 client-credentials grant. The returned access_token must be sent as `Authorization: Bearer <token>` on all other Prove API calls.'
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/TokenRequest'
      responses:
        '200':
          description: A new access token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TokenResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
      security: []
components:
  schemas:
    TokenResponse:
      type: object
      properties:
        access_token:
          type: string
        token_type:
          type: string
          example: Bearer
        expires_in:
          type: integer
          description: Access token lifetime in seconds.
        refresh_token:
          type: string
        refresh_expires_in:
          type: integer
    Error:
      type: object
      properties:
        code:
          type: string
        message:
          type: string
        details:
          type: array
          items:
            type: object
            additionalProperties: true
    TokenRequest:
      type: object
      required:
      - grant_type
      - client_id
      - client_secret
      properties:
        grant_type:
          type: string
          enum:
          - client_credentials
          description: OAuth 2.0 grant type.
        client_id:
          type: string
          description: Prove-issued client ID.
        client_secret:
          type: string
          description: Prove-issued client secret.
  responses:
    Unauthorized:
      description: Missing, invalid, or expired access token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: OAuth 2.0 client-credentials Bearer access token obtained from POST /token.
    oauth2:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://api.prove.com/v3/token
          scopes: {}