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Commenda exposes several APIs that let you programmatically manage business entities, calculate indirect tax, incorporate companies, build workflows, and more. This page helps you find the right API for your use case and get started quickly.

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Available APIs

Global Indirect Tax

Calculate tax rates, manage registrations, track transactions, handle exemptions, and automate filings across jurisdictions.

CommendaOS

Create and manage business entities, government identifiers, registrations, locations, credentials, and documents.

Incorporation

Create companies, start incorporation services, and track payment intents and document delivery through affiliate-scoped endpoints.

Workflow Builder

Define multi-step service request workflows with conditional logic, approvals, and automated task assignment.

Address API

Geocode and validate addresses for accurate tax jurisdiction resolution.

MCP Server

Connect Commenda to AI tools and agents using the Model Context Protocol.

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Which API do you need?

Use caseAPI
Calculate indirect tax on a transactionGlobal Indirect Tax
Create or retrieve business entitiesCommendaOS
Incorporate a new entity programmaticallyIncorporation
Manage tax registrations across jurisdictionsGlobal Indirect Tax — Registrations
Track registration thresholdsGlobal Indirect Tax — Registration Thresholds
Store and retrieve entity documentsCommendaOS — Documents
Automate multi-step service deliveryWorkflow Builder
Validate or geocode an addressAddress API
Build AI-powered tools on Commenda dataMCP Server

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Authentication

Commenda APIs use two authentication methods depending on the API:

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Bearer token

The Global Indirect Tax API and CommendaOS API use Bearer token authentication. Include your token in the Authorization header of every request: 
curl --request GET \
  --url 'https://transaction-tax.api.in.commenda.io/api/v1/registrations' \
  --header 'Authorization: Bearer <your_token>'

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Affiliate API key

The Incorporation API uses an affiliate API key passed in the x-api-key header: 
curl --request GET \
  --url 'https://api.prod.commenda.io/api/v1/public/payment-intents' \
  --header 'x-api-key: <your_api_key>'
Contact the Commenda team to get API keys for both testing and production environments.

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Base URLs

APIBase URL
Global Indirect Taxhttps://transaction-tax.api.in.commenda.io/api/v1
CommendaOS / Incorporationhttps://api.prod.commenda.io/api/v1/public
All endpoint paths in this documentation are relative to their respective base URL.

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Next steps

Global Indirect Tax quickstart

Start calculating tax rates and managing transactions.

CommendaOS overview

Learn the entity data model before calling the API.