Kintsugi

Kintsugi Registrations API

State tax registrations.

Documentation GitHub OpenAPI

Operations 5

POST /registrations Create a registration. #

GET /registrations List registrations. #

GET /registrations/{id} Get a registration by ID. #

PATCH /registrations/{id} Update a registration. #

POST /registrations/{id}/deregister Deregister a registration. #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/kintsugi-registrations-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Kintsugi Tax Address Validation Registrations 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: Registrations
  description: State tax registrations.
paths:
  /registrations:
    post:
      operationId: createRegistration
      tags:
      - Registrations
      summary: Create a registration.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RegistrationRequest'
      responses:
        '201':
          description: Registration created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Registration'
    get:
      operationId: getRegistrations
      tags:
      - Registrations
      summary: List registrations.
      responses:
        '200':
          description: Registrations for the organization.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Registration'
  /registrations/{id}:
    get:
      operationId: getRegistrationById
      tags:
      - Registrations
      summary: Get a registration by ID.
      parameters:
      - $ref: '#/components/parameters/Id'
      responses:
        '200':
          description: The requested registration.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Registration'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateRegistration
      tags:
      - Registrations
      summary: Update a registration.
      parameters:
      - $ref: '#/components/parameters/Id'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RegistrationRequest'
      responses:
        '200':
          description: Registration updated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Registration'
  /registrations/{id}/deregister:
    post:
      operationId: deregisterRegistration
      tags:
      - Registrations
      summary: Deregister a registration.
      parameters:
      - $ref: '#/components/parameters/Id'
      responses:
        '200':
          description: Registration deregistered.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Registration'
components:
  responses:
    NotFound:
      description: Resource not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      properties:
        detail:
          type: string
        status_code:
          type: integer
    RegistrationRequest:
      type: object
      properties:
        state:
          type: string
        country:
          type: string
        effective_date:
          type: string
          format: date
      required:
      - state
    Registration:
      type: object
      properties:
        id:
          type: string
        state:
          type: string
        country:
          type: string
        registration_number:
          type: string
        status:
          type: string
        effective_date:
          type: string
          format: date
        filing_frequency:
          type: string
  parameters:
    Id:
      name: id
      in: path
      required: true
      schema:
        type: string
  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.