All MM client endpoints require authentication via theDocumentation Index
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X-API-Key header (UUID format).
Client API authentication
Pass your API key (UUID format) in theX-API-Key header:
client entity. All data returned is filtered to your client — you only see your own orders, bets, and positions.
WebSocket authentication
For WebSocket connections, send your API key in the subscribe message:Rate limiting
Rate limits are enforced per client:- REST API: 2,000 requests per minute
- WebSocket: Maximum 5 concurrent connections per API key
- Exceeded: Returns
429 Too Many Requests
Error responses
| Status | Meaning |
|---|---|
401 | Invalid or missing API key (must be valid UUID) |
429 | Rate limit exceeded |