SeedMapper-CevAPI

SeedMapper-CevAPI renders a world's terrain and structures as a map from the world seed, and runs on the client alone, so a player's own game needs it and a server does not. It is a fork of the original SeedMapper mod with changes to CevAPI-based extra features. The project credits the original author, xpple, and the source code and issue tracker are public under the GNU Lesser General Public License v3.0 only, which makes it open source.

The mod is built for Fabric and targets game versions 1.21.11 – 26.1.2 across four release versions, with the latest file 0.21 for 26.1.2, published on 2026-05-24. Its first file went up on 2026-01-29. The mod does not depend on other mods beyond Fabric itself. Datapack structures are parsed separately from vanilla ones and cached for the current session, so switching dimensions keeps them available without reloading.

Map colors, zoom and the world border are set with commands. The map can use an intense high-contrast palette, small or large flat colored squares, and a player-set maximum zoom where a value of 6000 is suggested. Borders are shown from -8000 to +8000 on both axes and can be overridden per dimension, with 0 falling back to the global border.