Authentication

API keys

Create a key in Settings → API. Keys are prefixed fl_ and shown only once - store them securely.

Using the key

Send it as a Bearer token on every request:

Authorization: Bearer fl_your_api_key_here

Key hygiene

• Keys grant full access to your account's renders and credits - treat them like passwords.
• Create one key per integration so you can revoke a single leak without rotating everything.
• Revoke a compromised key immediately from Settings → API; it stops working at once.

Errors

A missing or invalid key returns 401 Unauthorized:

{ "error": "unauthorized", "message": "Missing or invalid API key." }