You finish the sentence: snap together triggers, effects and modifiers into your own challenge, right in the browser. Your server imports it with one command.
Pair triggers with effects, stack modifiers, and let any trigger win or lose the run. Doubles, contradictions and terrible ideas are all allowed. The builder only checks the paperwork.
Download the preset as JSON, or copy a share link. The whole challenge lives in the URL. Post it in a video description, a Discord, anywhere.
Drop the file into config/challengex/presets/, or
plugins/ChallengeX/presets/ on Paper, and run
/challengex import. Works in singleplayer and on servers.
ChallengeX is server-side only and comes in two builds, a Fabric mod and a Paper plugin, both for Minecraft 26.2. Vanilla clients join a server running either one, and the Fabric build also covers singleplayer. This site only builds presets. ChallengeX runs them.
Someone sent you a .json? Drop it here to read it, edit it, or
re-share it. The file never leaves your browser.