Vanta Authentication API

openapi: 3.0.0
info:
  title: Conduct an audit Auditors Authentication API
  version: 1.0.0
  description: The Auditor API lets audit firms conduct audits from a tool outside of Vanta. Unlock data syncing with Vanta through this API.
  termsOfService: https://www.vanta.com/terms
  license:
    name: UNLICENSED
  contact:
    name: API Support
    url: https://help.vanta.com/
    email: support@vanta.com
servers:
- url: https://api.vanta.com/v1
tags:
- name: Authentication
  description: OAuth 2.0 token management
paths:
  /oauth/token:
    post:
      operationId: getAccessToken
      summary: Get Access Token
      description: Obtain an OAuth 2.0 access token using client credentials. Use the returned access_token as a Bearer token in subsequent API requests.
      tags:
      - Authentication
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              properties:
                grant_type:
                  type: string
                  enum:
                  - client_credentials
                  description: OAuth 2.0 grant type
                client_id:
                  type: string
                  description: Your Vanta client ID
                client_secret:
                  type: string
                  description: Your Vanta client secret
                scope:
                  type: string
                  description: Space-separated list of OAuth scopes
              required:
              - grant_type
              - client_id
              - client_secret
      responses:
        '200':
          description: Access token response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccessToken'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    AccessToken:
      type: object
      properties:
        access_token:
          type: string
          description: OAuth 2.0 access token for API requests
        token_type:
          type: string
          description: Token type (Bearer)
        expires_in:
          type: integer
          description: Token expiration time in seconds
        scope:
          type: string
          description: Granted scopes
    Error:
      type: object
      properties:
        error:
          type: string
          description: Error code
        message:
          type: string
          description: Human-readable error description
        details:
          type: array
          items:
            type: string
          description: Additional error details
  responses:
    BadRequest:
      description: Bad request — invalid parameters or request body
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Unauthorized — missing or invalid access token
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    oauth:
      type: oauth2
      description: Get an oauth token from the token url and use it as a bearer token to access the Vanta API.
      flows:
        clientCredentials:
          scopes:
            auditor-api.audit:read: Grant read-only access to your audits
            auditor-api.audit:write: Grant read-write access to your audits
            auditor-api.auditor:read: Grant read-only access to your auditors
            auditor-api.auditor:write: Grant read-write access to your auditors
          tokenUrl: https://api.vanta.com/oauth/token
    bearerAuth:
      type: http
      scheme: bearer