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Commenda exposes several APIs that let you programmatically manage business entities, calculate indirect tax, 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.

Company Name Checker

Check company name availability across US state jurisdictions before incorporation.

Compliance Calendar Preview

Generate a stateless preview of compliance obligations for a corporation profile and target fiscal year.

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.

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Which API do you need?

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Authentication

Commenda APIs use one of two authentication methods, depending on the API.

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Global Indirect Tax API

The Global Indirect Tax API uses Bearer token authentication. Include your token in the Authorization header of every request:

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Company Name Checker and Compliance Calendar Preview

These APIs take an API key in the x-api-key header. Contact the Commenda team to get a key. See Company Name Checker and Compliance Calendar Preview for examples.

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Base URLs

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.