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

# Authentication

The Chargily Pay API uses API keys for request authentication. You can access and manage your API keys on [the Developers Corner page in the Chargily Pay Dashboard](http://pay.chargily.com/dashboard/developers-corner "the Developers Corner in the Chargily Pay Dashboard").

The secret key should be sent within an Authorization Bearer Header for each request.

<ParamField header="Authorization" type="string" required>
  Authorization header in the format of `Bearer [token]`, with `[token]`
  representing your API Secret Key. Example: `Bearer
      test_sk_Fje5EhFwyGTGqk4xxxxxxxxxxxxxxxxxxxxxxxxx`
</ParamField>

<Note>
  Requests made over plain HTTP (non HTTPS) and authentication-less (without
  providing an API key) will result in failure.
</Note>

<Snippet file="api-secret-key-warning.mdx" />