> ## Documentation Index
> Fetch the complete documentation index at: https://docs.commenda.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Corporations

> Understand how Commenda's Global Indirect Tax API manages corporations for both single and multi-entity implementations.

## API Authentication for Partner vs. Business Implementations

Each Commenda Global Indirect Tax API organization receives an API token, whether the organization manages multiple corporations (Partner Implementation) or a single corporation (Business Implementation). Include this token on each request as `Authorization: Bearer <api_token>`.

## Corporations

In Commenda's system, a corporation refers to a distinct legal entity or business that the API interacts with. Users can set up corporations in two main ways:

* **Partner Implementations:** For users managing multiple businesses (such as merchants or clients), each entity they handle is treated as a separate corporation within the API. This is useful when different legal entities require separate records or compliance processes.
* **Business Implementations:** For users building the API for their own company, only one corporation needs to be created, representing the user's business.

### Use Case Labels

* **Partner Implementations:** For users managing multiple corporations.
* **Business Implementations:** For users managing a single corporation for their own business.

## Corporations and Their Relationship with Other Resources

Most resources in the system, such as customers, transactions, registrations, filings, and files, are linked to a specific corporation. When working with these resources, provide the `corporation_id` for context where the endpoint requires it. You can retrieve all corporations associated with your organization by using the `GET /corporations` endpoint.