Early Hints

Informational

Used to return some response headers before final HTTP message

Allows the server to send preliminary headers while preparing the full response

How this status code appears in HTTP responses

HTTP Response Header

HTTP/1.1 103 Early Hints

cURL Example

curl -I https://example.com
# Returns: HTTP/1.1 103 Early Hints

This is an informational response indicating that the request was received and understood.

Other codes in the same category

The server has received the request headers and the client should proceed to send the request body

The requester has asked the server to switch protocols and the server has agreed to do so

The server has received and is processing the request, but no response is available yet