# API Keys & Auth

Authenticate requests with your API key.

## Authentication

All endpoints (except `/api/health`) require a valid API key. Include it using one of these methods:

#### Authorization Header (Recommended)

Authorization: Bearer algrow_...

#### Query Parameter

?api_key=algrow_...

#### Form Data Field

api_key=algrow_...

Sent in the multipart form body

**Keep your API key secret.** Do not expose it in client-side code, public repositories, or URLs that may be logged. If compromised, regenerate it immediately from your dashboard.