http-headers X-Request-ID Request ID (Request / Response)


Example

The same X-Request-ID header can be sent by a client in a request, or by a server in a response.

X-Request-ID: f9ed4675f1c53513c61a3b3b4e25b4c0

The value does not carry any inherent meaning, but is just a token to identify correlating requests and responses.