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Status codes

Endpoints return appropriate HTTP status codes based on the success or failure of the request in the HTTP status line (e.g. HTTP/1.1 200 OK or HTTP/1.1 400 Bad Request). Common status codes are:
  • 200: Success
  • 400: Bad Request (missing parameters, invalid JSON, etc.)
  • 404: Not Found (model doesn’t exist, etc.)
  • 429: Too Many Requests (e.g. when a rate limit is exceeded)
  • 500: Internal Server Error
  • 502: Bad Gateway (e.g. when a cloud model cannot be reached)

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Error messages

Errors are returned in the application/json format with the following structure, with the error message in the error property: 
{
  "error": "the model failed to generate a response"
}

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Errors that occur while streaming

If an error occurs mid-stream, the error will be returned as an object in the application/x-ndjson format with an error property. Since the response has already started, the status code of the response will not be changed. 
{"model":"gemma3","created_at":"2025-10-26T17:21:21.196249Z","response":" Yes","done":false}
{"model":"gemma3","created_at":"2025-10-26T17:21:21.207235Z","response":".","done":false}
{"model":"gemma3","created_at":"2025-10-26T17:21:21.219166Z","response":"I","done":false}
{"model":"gemma3","created_at":"2025-10-26T17:21:21.231094Z","response":"can","done":false}
{"error":"an error was encountered while running the model"}