> Finks API docs. Every page: https://finks.ai/llms.txt. The OpenAPI spec: https://finks.ai/docs/openapi.json.

# Authentication

Keep your key safe and send it with every request.

## Send your key

Send it from your server, never the browser.

Header:

```text
Authorization: Bearer $FINKS_API_KEY
```

## Rotate and revoke

A key is shown once. Rotate or revoke it in [API keys](https://dashboard.finks.ai/keys): a rotated key keeps working until you revoke it.

Every key spends the same credit balance: your plan's credits, then overage on paid plans.