Downloads.
Mod Beta 1.7.3 easier than ever before with the powerful and modern FabricMC modloader at your fingertips.
But honestly these days you should really be using babric, unless you really need MCL for your mod (Babric is actually maintained).
Most mods will probably also use an API Library for ease of modifying the game. There are a couple to pick from:
the more widely used but less documented Station API, and the OG library for Cursed Legacy which is documented on this website, Cursed Legacy API.
If you are using Station API, you may need an older version of the MultiMC instance.
If you are using Station API, you may need an older version of the MultiMC instance.