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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.

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.

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.

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Which API do you need?

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Authentication

Commenda APIs use two authentication methods depending on the API:

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Legacy Affiliate API

The legacy affiliate API uses an affiliate API key passed in the x-api-key header:

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CommendaOS Partner API

The CommendaOS Partner API uses a partner API key passed in the x-api-key header:

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Managing partner API keys

Manage partner API keys in the Commenda dashboard under Settings > API keys. New keys are prefixed with cmda_ and are shown only once when they are created. Copy the key immediately and store it securely, because Commenda stores only a SHA-256 hash of the key and cannot show the raw value again later. To rotate a key, create a new key in the dashboard, update your integration to use it, confirm requests succeed, and then delete the old key.

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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:
If Settings > API keys is not available in your dashboard, contact the Commenda team to enable API key management for your account.

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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.