The client connected to a BungeeCord or Velocity proxy server equipped with an Eaglercraft listener plugin (like EaglercraftXB). This plugin converted browser WebSockets into standard Minecraft TCP packets.

: A massive library of existing Spigot and Bukkit plugins was already perfectly compatible with 1.8.8 server backends.

One server that was actively running in 2021 and continues to be relevant is Jonarchy. Launched on September 9, 2019, this Spanish-language server offers crossplay between Eaglercraft, Java, and Bedrock editions of Minecraft. Features include:

is a browser-based version of Minecraft (specifically Minecraft 1.5.2 or 1.8.8) that runs on JavaScript/HTML5, requiring no Java installation.

Many popular 2021 servers (like early versions of NetherGames or community-run "PvP Legacy" forks) implemented bridges to support browser clients. This allowed desktop players and browser players to compete together, maintaining a high player count. How to Find and Use 2021-Era Eaglercraft Servers

Eaglercraft was in its earliest stages of development, focusing primarily on a web-based port of Minecraft 1.5.2 . While the project technically began in , the widely popular 1.8.8 (EaglercraftX)

For an up-to-date and comprehensive selection, you can use community-maintained lists: I Tested 3 Eaglercraft Servers to Find the Best One