AmTrust Financial Services Authentication API

openapi: 3.0.3
info:
  title: AmTrust Financial Services Commercial Lines Appetite Authentication API
  description: The AmTrust Commercial Lines API enables insurance agents, brokers, and technology partners to review appetite, generate quotes, and bind commercial lines policies. Supports workers' compensation, BOP, general liability, and commercial package across 300+ eligible class codes.
  version: 1.0.0
  contact:
    name: AmTrust API Support
    url: https://amtrustfinancial.com/api
  termsOfService: https://amtrustfinancial.com/terms-of-use
  x-generated-from: documentation
servers:
- url: https://api.amtrustservices.com
  description: AmTrust Production API
security:
- bearerAuth: []
tags:
- name: Authentication
  description: OAuth 2.0 token management
paths:
  /oauth/token:
    post:
      operationId: getAccessToken
      summary: AmTrust Financial Services Get Access Token
      description: Obtain an OAuth 2.0 access token using client credentials. Tokens are valid for 4 hours and must be sent with all subsequent API requests via SSL encrypted connection.
      tags:
      - Authentication
      security: []
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - grant_type
              - client_id
              - client_secret
              properties:
                grant_type:
                  type: string
                  enum:
                  - client_credentials
                  description: OAuth 2.0 grant type
                  example: client_credentials
                client_id:
                  type: string
                  description: Client ID provided by AmTrust
                  example: your-client-id
                client_secret:
                  type: string
                  description: Client secret provided by AmTrust
                  example: your-client-secret
      responses:
        '200':
          description: Access token issued successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TokenResponse'
              examples:
                getAccessToken200Example:
                  summary: Default getAccessToken 200 response
                  x-microcks-default: true
                  value:
                    status: success
                    message: Operation completed
        '401':
          description: Invalid credentials
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                getAccessToken401Example:
                  summary: Default getAccessToken 401 response
                  x-microcks-default: true
                  value:
                    status: success
                    message: Operation completed
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    ErrorResponse:
      type: object
      description: Error response
      properties:
        error:
          type: string
          description: Error code
          example: invalid_request
        message:
          type: string
          description: Human-readable error message
          example: Invalid class code for the specified state
        details:
          type: array
          items:
            type: string
          description: Additional error details
    TokenResponse:
      type: object
      description: OAuth 2.0 token response
      properties:
        access_token:
          type: string
          description: Access token for API calls
          example: eyJhbGciOiJSUzI1NiJ9...
        token_type:
          type: string
          description: Token type
          example: Bearer
        expires_in:
          type: integer
          description: Token expiry in seconds (14400 = 4 hours)
          example: 14400
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: OAuth 2.0 access token obtained from /oauth/token endpoint
externalDocs:
  description: AmTrust API Documentation
  url: https://amtrustfinancial.com/api