Forge Updates JSON file

If you're a Forge mod developer, your Modrinth mods have an automatically generated updates.json using the Forge Update Checker.

The only setup is to insert the URL into the [[mods]] section of your mods.toml file as such:

[[mods]]
# the other stuff here - ID, version, display name, etc.
updateJSONURL = "https://api.modrinth.com/updates/{slug|ID}/forge_updates.json"

Replace {slug|id} with the slug or ID of your project.

Modrinth will handle the rest! When you update your mod, Forge will notify your users that their copy of your mod is out of date.

Make sure that the version format you use for your Modrinth releases is the same as the version format you use in your mods.toml. If you use a format such as 1.2.3-forge or 1.2.3+1.19 with your Modrinth releases but your mods.toml only has 1.2.3, the update checker may not function properly.

If you're using NeoForge, NeoForge versions will, by default, not appear in the default URL. You will need to add ?neoforge=only to show your NeoForge-only versions, or ?neoforge=include for both.

[[mods]]
# the other stuff here - ID, version, display name, etc.
updateJSONURL = "https://api.modrinth.com/updates/{slug|ID}/forge_updates.json?neoforge=only"

{
  "homepage": "https://modrinth.com"
}