openapi: 3.0.1
info:
  title: Kintsugi Tax Address Validation Exemptions API
  description: REST API for the Kintsugi AI sales tax compliance and automation platform. Calculate US sales tax, VAT, and GST; sync transactions, products, and customers; validate addresses; manage physical nexus, exemptions, and registrations; and retrieve automated filings. Authentication uses an API key supplied in the x-api-key header together with the x-organization-id header identifying the organization. Endpoints, fields, and schemas in this document reflect Kintsugi's public API reference at docs.trykintsugi.com and are not exhaustive; consult the provider documentation for the authoritative contract.
  termsOfService: https://www.trykintsugi.com/terms-of-service
  contact:
    name: Kintsugi Support
    url: https://www.trykintsugi.com/support
  version: '1.0'
servers:
- url: https://api.trykintsugi.com/v1
  description: Kintsugi production API base URL
security:
- ApiKeyAuth: []
  OrganizationId: []
tags:
- name: Exemptions
  description: Customer tax exemptions and certificates.
paths:
  /exemptions:
    post:
      operationId: createExemption
      tags:
      - Exemptions
      summary: Create an exemption.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ExemptionRequest'
      responses:
        '201':
          description: Exemption created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exemption'
    get:
      operationId: getExemptions
      tags:
      - Exemptions
      summary: List exemptions.
      parameters:
      - $ref: '#/components/parameters/Page'
      - $ref: '#/components/parameters/Size'
      responses:
        '200':
          description: A page of exemptions.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExemptionPage'
  /exemptions/{id}:
    get:
      operationId: getExemptionById
      tags:
      - Exemptions
      summary: Get an exemption by ID.
      parameters:
      - $ref: '#/components/parameters/Id'
      responses:
        '200':
          description: The requested exemption.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exemption'
        '404':
          $ref: '#/components/responses/NotFound'
  /exemptions/{id}/certificates:
    post:
      operationId: uploadExemptionCertificate
      tags:
      - Exemptions
      summary: Upload an exemption certificate.
      parameters:
      - $ref: '#/components/parameters/Id'
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                file:
                  type: string
                  format: binary
      responses:
        '201':
          description: Certificate uploaded.
  /exemptions/{id}/attachments:
    get:
      operationId: getAttachmentsForExemption
      tags:
      - Exemptions
      summary: Get attachments for an exemption.
      parameters:
      - $ref: '#/components/parameters/Id'
      responses:
        '200':
          description: Exemption attachments.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Attachment'
components:
  parameters:
    Page:
      name: page
      in: query
      schema:
        type: integer
        default: 1
    Size:
      name: size
      in: query
      schema:
        type: integer
        default: 50
    Id:
      name: id
      in: path
      required: true
      schema:
        type: string
  schemas:
    ExemptionPage:
      $ref: '#/components/schemas/Page'
    Attachment:
      type: object
      properties:
        id:
          type: string
        filename:
          type: string
        url:
          type: string
        content_type:
          type: string
    Exemption:
      type: object
      properties:
        id:
          type: string
        external_customer_id:
          type: string
        state:
          type: string
        exemption_type:
          type: string
        status:
          type: string
        valid_from:
          type: string
          format: date
        valid_to:
          type: string
          format: date
    ExemptionRequest:
      type: object
      properties:
        external_customer_id:
          type: string
        state:
          type: string
        exemption_type:
          type: string
        valid_from:
          type: string
          format: date
        valid_to:
          type: string
          format: date
      required:
      - external_customer_id
      - state
    Page:
      type: object
      properties:
        items:
          type: array
          items:
            type: object
        total:
          type: integer
        page:
          type: integer
        size:
          type: integer
        pages:
          type: integer
    Error:
      type: object
      properties:
        detail:
          type: string
        status_code:
          type: integer
  responses:
    NotFound:
      description: Resource not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: API key generated in the Kintsugi dashboard.
    OrganizationId:
      type: apiKey
      in: header
      name: x-organization-id
      description: Identifier of the organization the request acts on behalf of.