openapi: 3.1.0
info:
  title: Avalara 1099 & W-9 1099 Forms Classification 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: Classification
  description: Classify products into HS Codes and tax codes
paths:
  /classify:
    post:
      operationId: classifyProduct
      summary: Avalara Classify a Product
      description: Classifies a product into HS Code and Avalara Tax Code based on the provided product description, attributes, and destination country. Returns predictions with confidence scores.
      tags:
      - Classification
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ClassifyRequest'
      responses:
        '200':
          description: Classification results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ClassifyResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
  /classify/batch:
    post:
      operationId: classifyBatch
      summary: Avalara Classify a Batch of Products
      description: Classifies multiple products in a single request.
      tags:
      - Classification
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                items:
                  type: array
                  items:
                    $ref: '#/components/schemas/ClassifyRequest'
                destinationCountry:
                  type: string
      responses:
        '200':
          description: Batch classification results
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/ClassifyResponse'
  /hscodes/{hsCode}:
    get:
      operationId: getHSCode
      summary: Avalara Look Up an HS Code
      description: Retrieves details for a specific HS Code.
      tags:
      - Classification
      parameters:
      - name: hsCode
        in: path
        required: true
        schema:
          type: string
      - name: country
        in: query
        schema:
          type: string
        description: Country for country-specific tariff details
      responses:
        '200':
          description: HS Code details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HSCodeInfo'
  /hscodes/{hsCode}/hierarchy:
    get:
      operationId: getHSCodeHierarchy
      summary: Avalara Get HS Code Hierarchy
      description: Returns the full hierarchy for an HS Code from chapter through heading, subheading, and national tariff line.
      tags:
      - Classification
      parameters:
      - name: hsCode
        in: path
        required: true
        schema:
          type: string
      - name: country
        in: query
        schema:
          type: string
      responses:
        '200':
          description: HS Code hierarchy
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/HSCodeInfo'
components:
  schemas:
    ClassifyRequest:
      type: object
      required:
      - description
      - destinationCountry
      properties:
        description:
          type: string
          description: Product description for classification
        destinationCountry:
          type: string
          description: ISO 3166-1 alpha-2 destination country
        originCountry:
          type: string
          description: ISO 3166-1 alpha-2 origin country
        attributes:
          type: object
          additionalProperties:
            type: string
          description: Additional product attributes
        itemCode:
          type: string
          description: Product identifier
    ClassifyResponse:
      type: object
      properties:
        itemCode:
          type: string
        description:
          type: string
        predictions:
          type: array
          items:
            $ref: '#/components/schemas/ClassificationPrediction'
        avataxCode:
          type: string
          description: Recommended Avalara tax code
    ClassificationPrediction:
      type: object
      properties:
        hsCode:
          type: string
          description: Predicted HS Code
        description:
          type: string
          description: HS Code description
        confidence:
          type: number
          format: double
          description: Confidence score (0-1)
        parentCode:
          type: string
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
    HSCodeInfo:
      type: object
      properties:
        hsCode:
          type: string
        description:
          type: string
        level:
          type: string
          enum:
          - Section
          - Chapter
          - Heading
          - Subheading
          - TariffLine
        parentCode:
          type: string
        dutyRate:
          type: string
        unitOfMeasure:
          type: string
  responses:
    BadRequest:
      description: Invalid request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  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/