xlsatoms lists the interned atoms defined on an X11 server
Version 1.1 and later of xlsatoms use (and require) libxcb instead of libX11, for less latency when communicating with the X server.
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.x.org/mailman/listinfo/xorg
The master development code repository can be found at:
https://gitlab.freedesktop.org/xorg/app/xlsatoms
Please submit bug reports and requests to merge patches there.
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches