Kintsugi

Kintsugi Nexus API

Physical and economic nexus tracking.

Documentation GitHub OpenAPI

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-nexus-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 email required.

GitHub Google LinkedIn

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

OpenAPI Specification

openapi: 3.0.1
info:
  title: Kintsugi Tax Address Validation Nexus 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: Nexus
  description: Physical and economic nexus tracking.
paths:
  /nexus:
    get:
      operationId: getNexusForOrg
      tags:
      - Nexus
      summary: Get nexus status for the organization.
      responses:
        '200':
          description: Nexus status across jurisdictions.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Nexus'
  /nexus/physical:
    post:
      operationId: createPhysicalNexus
      tags:
      - Nexus
      summary: Create a physical nexus.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PhysicalNexusRequest'
      responses:
        '201':
          description: Physical nexus created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Nexus'
    get:
      operationId: getPhysicalNexus
      tags:
      - Nexus
      summary: List physical nexus entries.
      responses:
        '200':
          description: Physical nexus entries.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Nexus'
  /nexus/physical/{id}:
    patch:
      operationId: updatePhysicalNexus
      tags:
      - Nexus
      summary: Update a physical nexus.
      parameters:
      - $ref: '#/components/parameters/Id'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PhysicalNexusRequest'
      responses:
        '200':
          description: Physical nexus updated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Nexus'
    delete:
      operationId: deletePhysicalNexus
      tags:
      - Nexus
      summary: Delete a physical nexus.
      parameters:
      - $ref: '#/components/parameters/Id'
      responses:
        '204':
          description: Physical nexus deleted.
components:
  schemas:
    PhysicalNexusRequest:
      type: object
      properties:
        state:
          type: string
        country:
          type: string
        start_date:
          type: string
          format: date
        end_date:
          type: string
          format: date
      required:
      - state
    Nexus:
      type: object
      properties:
        id:
          type: string
        state:
          type: string
        country:
          type: string
        nexus_type:
          type: string
          enum:
          - PHYSICAL
          - ECONOMIC
        status:
          type: string
        registration_id:
          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.