
MineStamp is a Minecraft plugin that displays emoji stamps above players. It supports Unicode emoji, multilingual messages, and multi-server synchronization through object storage such as S3, MinIO, and Cloudflare R2.
Communication on a Minecraft server often happens through chat and player actions, but a small visual reaction can make nearby interactions feel more expressive. MineStamp was built to display Unicode emoji above players so they can share lightweight reactions in the world.
Emoji are already familiar to many players, so the feature can add expression without forcing users to learn a large command or GUI system. Because the reaction appears above the player instead of only in chat, it is easier to understand who is reacting and what moment they are reacting to.
In-game, the emoji appears like a stamp above the player. MineStamp is strongest when the reaction is connected to the player's position and the moment in-game, instead of being limited to a chat log. It can be used for quick replies to nearby players or as a small visual reaction that remains understandable in screenshots and shared moments.
MineStamp uses ProtocolLib to control the visual display seen by Minecraft clients. It supports almost all Unicode emoji and includes multilingual messages for en_US and ja_JP.
The plugin also supports multi-server setups through object storage such as S3, MinIO, and Cloudflare R2. This makes the stamp data usable across a networked Minecraft environment rather than only on a single server.
Emoji rendering is sensitive to font differences and visual layout, so the implementation is not only about sending a string to the client. The goal is to make the stamp readable in Minecraft's actual rendering context while keeping the same experience available across both single-server and networked server setups.