{"service": "s2st-ws-gateway", "api_version": "v1", "protocol": "1.0", "websocket_endpoint": "/v1/realtime/s2st", "auth": {"required": true, "schemes": ["Authorization: Bearer <key>", "?api_key=<key>", "Sec-WebSocket-Protocol: s2st.<key>"]}, "capabilities": {"target_langs": ["zh", "en"], "modes": ["speech", "text"], "input_encodings": ["pcm_s16le", "pcm_f32le"], "output_encodings": ["pcm_s16le", "pcm_f32le"]}, "limits": {"max_sessions": 4, "max_message_bytes": 16777216, "session_max_seconds": 1800.0, "idle_timeout_s": 60.0}, "uptime_s": 5406.1, "active_sessions": 0}