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

# Authentication

In order to authenticate, you need to get your credentials by signing up to the [Developer Portal](https://developers.qonto.com/) (for more details on the process cf. [Get started](/get-started/general/developer-guidelines)).

For each API call, you will need to include those credentials in the following headers:

| Header           | Value          |
| ---------------- | -------------- |
| Authorization    | Bearer `token` |
| Qonto-Partner-Id | `partner_id`   |

Only in the Sandbox environment, you will also need to provide the following header:

| Header                | Value           |
| --------------------- | --------------- |
| X-Qonto-Staging-Token | `staging_token` |

<Tip>
  The `X-Qonto-Staging-Token` header bypasses the OneLogin gate that protects our Sandbox environment for **API calls only**. If you also need to open the `redirection_link` returned by [Create a registration](/api-reference/onboarding-api/endpoints/registrations/create-a-registration) in a browser, you have to bypass the gate a different way — see [Accessing the Sandbox environment](/get-started/general/sandbox-access).
</Tip>