Hi, I am th GL of Pulse. When I go to http://app.ryzom.com/app_ryzomapi/ I can only create key for this toon, not for the guild.
I'm not sure what the issue is. If you have access to guild forums and have admin privileges there, then RyzomAPI app should see you as guild leader aswell.
Try accessing api app from ingame, type /appzone 928, see if that fixes the issue outgame aswell.