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API Key Authentication

All API requests (except /health) require an API key passed via the X-API-Key header:

Getting an API Key

Option 1: Sign up via API

Option 2: Dashboard

Sign up at arbiterapi.com/signup to get your key from the dashboard.

Managing Keys

You can create multiple API keys per account and revoke them individually:

WebSocket Authentication

For WebSocket connections, pass your API key as a query parameter:

Rate Limits

Rate limit headers are included in every response: