# X-Qlik-Trace header

The X-Qlik-Trace header contains the ID of the original client connection to the Qlik Sense Proxy Service (QPS). The same value (except for the colons, :::) is logged as ConnectionId in the QPS logs.

Information noteThis ID is not the same as the QPS session ID.

The header has the following format:

`X-Qlik-Trace: [0] = <id>:::`

The other services are supposed to eventually insert their corresponding connection IDs in-between the colons, as indicated below:

&lt;QPS&gt;:&lt;Qlik Sense Engine Service (QES)&gt;:&lt;Qlik Sense Repository Service (QRS)&gt;:&lt;Qlik Sense Scheduler Service (QSS)&gt;