Common Error Codes

• 4xx (Client Error Status Codes): Generally indicate request syntax errors, authentication failures, or authorization failures that prevent completion of the request.

• 5xx (Server Error Status Codes): Generally indicate server-side errors, server downtime, request processing timeout, etc.

Error Code	Possible Causes	Solution
400	Request syntax error, cannot be understood by the server. May be caused by incorrect parameter passing, wrong format, etc.	Check and correct request parameters
401	Unauthorized access, usually authentication or authorization failure	Check if login credentials are correct
403	Server understands the request but refuses to execute, may be due to insufficient permissions	Check if user permissions are configured correctly
404	Requested resource does not exist	Check if the request path is correct
429	Unverified users: Limited to 100 requests per day. If daily requests exceed 100, you will receive a 429 error.	Try to complete identity verification with the model service provider
500	Internal server error, usually a code bug or service downtime	Check server logs, fix code issues
502	Server acting as gateway or proxy received an invalid response from upstream server	Check if upstream service is running correctly
503	Server temporarily unable to process requests, may be overloaded or under maintenance	Scale up server resources or wait for service recovery