103 Early Hints
Informational
Used to return some response headers before final HTTP message.
Explanation
The 103 (Early Hints) status code indicates to the client that the server is likely to send a final response with the headers included in the informational response. This allows the client to prepare for the final response, for example by pre-loading resources, while the server prepares that response.
This is particularly useful for implementing server push features with HTTP/2, allowing a server to suggest resources the client might want to pre-fetch.
Example Response
HTTP/1.1 103 Early Hints Link: </style.css>; rel=preload; as=style Link: </script.js>; rel=preload; as=script
Related Status Codes
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