openapi: 3.0.3
info:
  title: USDA AMS MARS API (MyMarketNews) Offices API
  description: The Market Analysis Reporting System (MARS) API provides programmatic access to USDA Agricultural Marketing Service agricultural market news data. The API allows users to automatically pull raw market news data including commodity prices, volume, and trade reports across livestock, dairy, fruits, vegetables, grains, and other agricultural commodities. Authentication via Basic auth with an API key is supported for registered users; no key is required for public access. All responses are in JSON format.
  version: v1.2
  contact:
    url: https://mymarketnews.ams.usda.gov
  x-generated-from: documentation
servers:
- url: https://marsapi.ams.usda.gov/services/v1.2
  description: MARS API v1.2
- url: https://marsapi.ams.usda.gov/services/v3.0
  description: MARS API v3.0
security: []
tags:
- name: Offices
  description: USDA AMS market news offices
paths:
  /offices:
    get:
      operationId: listOffices
      summary: USDA AMS List Offices
      description: Returns a list of USDA AMS market news offices that publish market reports.
      tags:
      - Offices
      responses:
        '200':
          description: A list of market news offices.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OfficesListResponse'
              examples:
                ListOffices200Example:
                  summary: Default listOffices 200 response
                  x-microcks-default: true
                  value:
                    results:
                    - office_id: NAT
                      name: National
                      city: Washington
                      state: DC
                      commodities:
                      - Cattle
                      - Hogs
                      - Dairy
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    OfficesListResponse:
      type: object
      title: Offices List Response
      description: List of USDA AMS market news offices.
      properties:
        results:
          type: array
          items:
            $ref: '#/components/schemas/Office'
    Office:
      type: object
      title: Office
      description: A USDA AMS market news office.
      properties:
        office_id:
          type: string
          description: Unique identifier for the office.
          example: NAT
        name:
          type: string
          description: Name of the market news office.
          example: National
        city:
          type: string
          description: City where the office is located.
          example: Washington
        state:
          type: string
          description: State where the office is located.
          example: DC
        commodities:
          type: array
          items:
            type: string
          description: List of commodities covered by this office.
          example:
          - Cattle
          - Hogs
          - Dairy
  securitySchemes:
    BasicAuth:
      type: http
      scheme: basic
      description: API key obtained from USDA AMS MyMarketNews registration. Use the API key as the username with an empty password, or encode as Base64 for Bearer auth. Public access without authentication is also available with lower rate limits.