# WebSocket Error Codes

| Error Codes | Description                                                                                                                                                              |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| 500         | Internal server error, an unexpected issue occurred on the server side.                                                                                                  |
| 501         | Request rate exceeded. The number of WebSocket requests has gone beyond the allowed per-minute limit.                                                                    |
| 505         | The number of requested symbols exceeds the allowed quota.                                                                                                               |
| 506         | Missing parameters, one or more required fields are not provided.                                                                                                        |
| 515         | Invalid parameter format. The request payload must be in valid JSON format.                                                                                              |
| 513         | WebSocket heartbeat timeout. The connection was closed because no heartbeat signal was received within the expected timeframe.                                           |
| 401         | Authentication failed. The API Key is invalid, missing, or not included in the required header or query parameter.                                                       |
| 404         | The requested WebSocket endpoint was not found.                                                                                                                          |
| 427         | The number of WebSocket connections has exceeded the package quota.                                                                                                      |
| 429         | Request rate limit exceeded. Your message frequency exceeds the quota allowed for your current plan.                                                                     |
| 499         | Client-side disconnection. Typically occurs in regions with unstable network conditions. Please reconnect from a stable network.                                         |
| 524         | Origin server connection timed out. Usually caused by temporary instability between our CDN provider and the origin server. The issue typically resolves itself shortly. |


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