> For the complete documentation index, see [llms.txt](https://docs.n8n.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.n8n.io/integrations/builtin/credentials/onesimpleapi.md).

# One Simple API credentials

You can use these credentials to authenticate the following nodes:

* [One Simple API](/integrations/builtin/app-nodes/n8n-nodes-base.onesimpleapi.md)

## Prerequisites <a href="#prerequisites" id="prerequisites"></a>

Create a [One Simple API](https://onesimpleapi.com/register) account.

## Supported authentication methods <a href="#supported-authentication-methods" id="supported-authentication-methods"></a>

* API token

## Related resources <a href="#related-resources" id="related-resources"></a>

Refer to [One Simple API's documentation](https://onesimpleapi.com/docs) for more information about the service.

## Using API token <a href="#using-api-token" id="using-api-token"></a>

To configure this credential, you'll need:

* An **API token**: Create a new API token on the [API Tokens](https://onesimpleapi.com/user/api-tokens) page. Be sure you select appropriate permissions for the token.

You can also access the API Tokens page by selecting your **Profile > API Tokens**.