openapi: 3.1.0
info:
  title: Avalara 1099 & W-9 1099 Forms HS Codes API
  description: The Avalara 1099 and W-9 API automates collection, validation, and e-filing of IRS forms including 1099 variants (1099-NEC, 1099-MISC, 1099-K, 1099-INT, 1099-DIV), 1095 forms, W-2, and 1042-S. It provides endpoints for creating, updating, managing, and filing various IRS information returns.
  version: '1.0'
  contact:
    name: Avalara Developer Relations
    url: https://developer.avalara.com/
    email: developer.relations@avalara.com
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
  termsOfService: https://legal.avalara.com/#siteterms
servers:
- url: https://api.avalara.com/1099/v1
  description: 1099 API Production
- url: https://api.sbx.avalara.com/1099/v1
  description: 1099 API Sandbox
security:
- bearerAuth: []
tags:
- name: HS Codes
  description: Retrieve HS Code classification results
paths:
  /classification-requests/{requestId}/results:
    get:
      operationId: getClassificationResults
      summary: Avalara Get Classification Results
      description: Retrieves the HS Code classification results for a completed classification request.
      tags:
      - HS Codes
      parameters:
      - name: requestId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Classification results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ClassificationResultList'
  /hs-codes/{hsCode}:
    get:
      operationId: getHSCodeDetails
      summary: Avalara Get HS Code Details
      description: Retrieves detailed information for a specific HS Code.
      tags:
      - HS Codes
      parameters:
      - name: hsCode
        in: path
        required: true
        schema:
          type: string
        description: The HS Code to look up
      - name: country
        in: query
        schema:
          type: string
        description: ISO 3166-1 alpha-2 country code for country-specific details
      responses:
        '200':
          description: HS Code details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HSCodeDetail'
components:
  schemas:
    HSCodeDetail:
      type: object
      properties:
        hsCode:
          type: string
        description:
          type: string
        chapter:
          type: string
        section:
          type: string
        parentCode:
          type: string
        dutyRate:
          type: string
        unitOfMeasure:
          type: string
    ClassificationResultList:
      type: object
      properties:
        value:
          type: array
          items:
            $ref: '#/components/schemas/ClassificationResult'
    ClassificationResult:
      type: object
      properties:
        itemCode:
          type: string
        description:
          type: string
        hsCode:
          type: string
          description: Classified HS Code
        hsCodeDescription:
          type: string
        confidence:
          type: number
          format: double
          description: Classification confidence score (0-1)
        country:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: OAuth 2.0 bearer token
externalDocs:
  description: 1099 & W-9 API Documentation
  url: https://developer.avalara.com/api-reference/avalara1099/avalara1099/