2xx Success
HTTP 203 Non-Authoritative Information
The response is a transformed proxy copy from a local or third-party copy.
When is 203 used?
- Modified content from a WAP gateway
- Compressed or filtered proxy responses
How to handle a 203 response
No error handling is needed. Check that the response body and headers match what your client expects — for example, a 204 response has no body.
Check the status code a URL returns from the command line:
curl -s -o /dev/null -w "%{http_code}\n" https://example.comHow to return 203 from your server
Node.js (Express)
res.status(203).json({ message: 'Non-Authoritative Information' });Python (Flask)
return {"message": "Non-Authoritative Information"}, 203Go (net/http)
w.WriteHeader(203)Frequently Asked Questions
What does HTTP 203 mean?
203 Non-Authoritative Information: The response is a transformed proxy copy from a local or third-party copy.
Is 203 an error?
No. 203 is in the 2xx Success class. Success: the request was received, understood, and accepted.