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

# Authentication

```curl Authenticated request theme={null}
curl --request GET https://api.fintoc.com/v1/links \
--header "Authorization: sk_test_9c8d8CeyBTx1VcJzuDgpm4H-bywJCeSx"
```

Fintoc uses API keys to authenticate requests. The API keys you use to make requests are called secret keys. Secret keys have broad privileges, so keep them safe. Don't share secret keys in public repositories or client-side code.

Include a secret key in the `Authorization` header with every API request:

```text Authentication theme={null}
Authorization: YOUR_SECRET_KEY
```

<Warning>
  Send every API request over [HTTPS](https://en.wikipedia.org/wiki/HTTP_Secure). Requests over plain HTTP fail. Unauthenticated requests also fail.
</Warning>