WhatsUp

Datapacks define listeners in data files under whatsup/listeners/. Each listener holds a URL to query and an integer for the number of seconds between queries. Based on the response, a listener can list actions and run a function whose resource location is given in the listener, with a predicate that checks the endpoint's result before the function executes. Listeners can also chain to other listeners, and a listener's functions run in the overworld by default unless a list of dimensions is provided.

Predicates are Groovy scripts stored under whatsup/predicates/. The script environment gives access to a context object that exposes the unprocessed response text, the response parsed as JSON or a map, and the data storages the listener may read or mutate. The optional property names map to resource locations for command data storage access. A whatsup command allows testing datapacks and running a listener immediately. The environment is server-side only, so players join without installing anything, and the mod is released under the GNU Lesser General Public License v3.0 or later as open source. Builds cover 1.19.4 – 1.20.1, with 1.2.0 for 1.20.1 as the latest file on both Forge and Quilt.