USDA AMS MARS API (MyMarketNews)

openapi: 3.0.3
info:
  title: USDA AMS MARS API (MyMarketNews)
  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
tags:
  - name: Reports
    description: Agricultural market news reports across all commodity types
  - name: Offices
    description: USDA AMS market news offices
paths:
  /reports:
    get:
      operationId: listReports
      summary: USDA AMS List Reports
      description: >-
        Returns a list of all available market news reports. Each report
        has a unique Slug_ID and Slug_Name that serve as identifiers.
        Reports cover livestock, dairy, fruits, vegetables, grains, cotton,
        tobacco, poultry, and other agricultural commodities.
      tags:
        - Reports
      parameters:
        - name: q
          in: query
          description: Search query to filter reports by name or description.
          required: false
          schema:
            type: string
            example: cattle
        - name: allSections
          in: query
          description: Return all report sections (true/false).
          required: false
          schema:
            type: boolean
            example: true
        - name: dateType
          in: query
          description: Date type to filter by (published, report).
          required: false
          schema:
            type: string
            enum:
              - published
              - report
            example: published
        - name: startDate
          in: query
          description: Start date for filtering reports (YYYY-MM-DD).
          required: false
          schema:
            type: string
            format: date
            example: '2026-01-01'
        - name: endDate
          in: query
          description: End date for filtering reports (YYYY-MM-DD). Maximum 180 days from startDate.
          required: false
          schema:
            type: string
            format: date
            example: '2026-04-19'
        - name: slug_id
          in: query
          description: Filter by specific report slug ID.
          required: false
          schema:
            type: string
            example: '2451'
        - name: class
          in: query
          description: Filter by commodity class (e.g., Livestock, Dairy, Fruit/Veg).
          required: false
          schema:
            type: string
            example: Livestock
        - name: limit
          in: query
          description: Maximum number of records to return (max 100000).
          required: false
          schema:
            type: integer
            maximum: 100000
            example: 100
        - name: offset
          in: query
          description: Number of records to skip for pagination.
          required: false
          schema:
            type: integer
            example: 0
        - name: sort_by
          in: query
          description: Field to sort results by.
          required: false
          schema:
            type: string
            example: published_date
        - name: sort_order
          in: query
          description: Sort order (asc or desc).
          required: false
          schema:
            type: string
            enum:
              - asc
              - desc
            example: desc
      responses:
        '200':
          description: A list of market news reports.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReportsListResponse'
              examples:
                ListReports200Example:
                  summary: Default listReports 200 response
                  x-microcks-default: true
                  value:
                    results:
                      - slug_id: '2451'
                        slug_name: National Weekly Cattle Summary
                        report_date: '2026-04-18'
                        published_date: '2026-04-18T16:00:00Z'
                        commodity: Cattle
                        market_type: Weekly Summary
                        office: National
                        section_name: All Classes
                    stats:
                      count: 1
                      total: 500
        '400':
          description: Bad request. Invalid query parameters.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized. Invalid API key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /reports/{slug_id}:
    get:
      operationId: getReport
      summary: USDA AMS Get Report
      description: >-
        Returns market news data for a specific report identified by its
        unique slug_id. Returns the full report data including commodity
        prices, volumes, and trade information.
      tags:
        - Reports
      parameters:
        - name: slug_id
          in: path
          description: Unique identifier (Slug_ID) for the market news report.
          required: true
          schema:
            type: string
            example: '2451'
        - name: startDate
          in: query
          description: Start date for filtering data within the report (YYYY-MM-DD).
          required: false
          schema:
            type: string
            format: date
            example: '2026-01-01'
        - name: endDate
          in: query
          description: End date for filtering data (YYYY-MM-DD). Maximum 180 days from startDate.
          required: false
          schema:
            type: string
            format: date
            example: '2026-04-19'
        - name: limit
          in: query
          description: Maximum records to return.
          required: false
          schema:
            type: integer
            maximum: 100000
            example: 100
        - name: offset
          in: query
          description: Number of records to skip.
          required: false
          schema:
            type: integer
            example: 0
      responses:
        '200':
          description: Report data with commodity prices and market information.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ReportDataResponse'
              examples:
                GetReport200Example:
                  summary: Default getReport 200 response
                  x-microcks-default: true
                  value:
                    results:
                      - slug_id: '2451'
                        slug_name: National Weekly Cattle Summary
                        report_date: '2026-04-18'
                        published_date: '2026-04-18T16:00:00Z'
                        commodity: Cattle
                        class: Slaughter
                        grade: Choice
                        head_count: 45000
                        price_per_cwt: 185.50
                        price_unit: CWT
                        region: National
                    stats:
                      count: 1
                      total: 1
        '404':
          description: Report not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /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:
  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.
  schemas:
    Report:
      type: object
      title: Report
      description: A USDA AMS market news report entry.
      properties:
        slug_id:
          type: string
          description: Unique identifier for the report.
          example: '2451'
        slug_name:
          type: string
          description: Unique name for the report.
          example: National Weekly Cattle Summary
        report_date:
          type: string
          format: date
          description: Date the report data covers.
          example: '2026-04-18'
        published_date:
          type: string
          format: date-time
          description: Date and time the report was published.
          example: '2026-04-18T16:00:00Z'
        commodity:
          type: string
          description: Agricultural commodity covered by the report.
          example: Cattle
        market_type:
          type: string
          description: Type of market covered (Weekly Summary, Daily, etc.).
          example: Weekly Summary
        office:
          type: string
          description: USDA AMS office that published the report.
          example: National
        section_name:
          type: string
          description: Section name within the report.
          example: All Classes
    ReportsListResponse:
      type: object
      title: Reports List Response
      description: Paginated list of market news reports.
      properties:
        results:
          type: array
          items:
            $ref: '#/components/schemas/Report'
        stats:
          $ref: '#/components/schemas/PaginationStats'
    ReportData:
      type: object
      title: Report Data
      description: Detailed commodity price and market data from a report.
      properties:
        slug_id:
          type: string
          description: Unique identifier for the report.
          example: '2451'
        slug_name:
          type: string
          description: Name of the report.
          example: National Weekly Cattle Summary
        report_date:
          type: string
          format: date
          description: Date the report data covers.
          example: '2026-04-18'
        published_date:
          type: string
          format: date-time
          description: Date the report was published.
          example: '2026-04-18T16:00:00Z'
        commodity:
          type: string
          description: Agricultural commodity.
          example: Cattle
        class:
          type: string
          description: Class or category within the commodity.
          example: Slaughter
        grade:
          type: string
          description: Grade or quality designation.
          example: Choice
        head_count:
          type: integer
          description: Number of head (animals) in the report.
          example: 45000
        price_per_cwt:
          type: number
          format: double
          description: Price per hundredweight (CWT).
          example: 185.50
        price_unit:
          type: string
          description: Unit of price measurement.
          example: CWT
        region:
          type: string
          description: Geographic region covered.
          example: National
    ReportDataResponse:
      type: object
      title: Report Data Response
      description: Response containing detailed report data.
      properties:
        results:
          type: array
          items:
            $ref: '#/components/schemas/ReportData'
        stats:
          $ref: '#/components/schemas/PaginationStats'
    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
    OfficesListResponse:
      type: object
      title: Offices List Response
      description: List of USDA AMS market news offices.
      properties:
        results:
          type: array
          items:
            $ref: '#/components/schemas/Office'
    PaginationStats:
      type: object
      title: Pagination Stats
      description: Pagination metadata for list responses.
      properties:
        count:
          type: integer
          description: Number of records in this response.
          example: 100
        total:
          type: integer
          description: Total number of records matching the query.
          example: 500
    ErrorResponse:
      type: object
      title: Error Response
      description: Standard error response from the MARS API.
      properties:
        error:
          type: string
          description: Error type or code.
          example: invalid_parameter
        message:
          type: string
          description: Human-readable error message.
          example: The requested resource was not found.
        status:
          type: integer
          description: HTTP status code.
          example: 404
security: []