This mod does not run in MT 5.6.0 and above. I got the following error.

2022-08-30 19:47:03: ERROR[Main]: ModError: Failed to load and run script from /root/programs/minetest_lss/bin/../games/minetest_game/mods/discordmt/init.lua: 2022-08-30 19:47:03: ERROR[Main]: ...t_lss/bin/../games/minetest_game/mods/discordmt/init.lua:117: attempt to index upvalue 'http' (a nil value) 2022-08-30 19:47:03: ERROR[Main]: stack traceback: 2022-08-30 19:47:03: ERROR[Main]: ...t_lss/bin/../games/minetest_game/mods/discordmt/init.lua:117: in function 'send' 2022-08-30 19:47:03: ERROR[Main]: ...t_lss/bin/../games/minetest_game/mods/discordmt/init.lua:162: in main chunk

And to answer the question, yes... minetest's .conf file has [discordmt] listed as a trusted mod for http requests