Question 1

What is a .sxcu file?

Accepted Answer

A ShareX custom-uploader config. Importing one tells ShareX to POST your screenshots to a specific endpoint and read the hosted URL back out of the response.

Question 2

How do I import it into ShareX?

Accepted Answer

Download the .sxcu and double-click it, or in ShareX open Destinations > Custom uploader settings > Import > From file. ShareX then offers to set it as your active uploader.

Question 3

What do the {json:...} fields mean?

Accepted Answer

They tell ShareX where to find each value in your endpoint's JSON response. {json:url} reads the 'url' field; use {regex:1|1} to pull from plain text instead.

Question 4

Is anything uploaded?

Accepted Answer

No. The config is generated entirely in your browser. The placeholder token in the jakelawrence.xyz preset is not a real credential.