evoker json

evoker.json

Describes a pack: the game, the loader, and the content. The pack author writes it (mostly through commands); servers and clients only read it.

A pack is a folder:

File
evoker.json	This file.
evoker.lock	Exactly which files the pack resolves to. Written by evoker. See evoker.lock.
icon.png or icon.jpg	Optional. Used as the Prism instance icon.
overrides/, client-overrides/, server-overrides/	Optional. Files installed as they are, mostly configs. See Overrides.

Publish the folder anywhere that serves plain files (a GitHub repo works: https://raw.githubusercontent.com/<you>/<pack>/main/). That folder URL is the pack URL.

{
  "name": "My Pack",
  "side": "both",
  "game": { "version": "1.21.4", "loader": "fabric", "build": "latest" },
  "content": {
    "modrinth:lithium": "latest",
    "modrinth:sodium": "latest",
    "modrinth:terralith": "2.5.8",
    "modrinth:distant-horizons": { "version": "latest", "optional": true },
    "modrinth:some-mod": { "version": "latest", "side": "client" },
    "url:geyser": { "url": "https://…/Geyser-Spigot.jar", "type": "plugin", "side": "server" }
  }
}

name (required)

The pack's display name. It names the Prism instance and is how evoker client commands refer to the pack.

side (required)

What the pack is for: server, client or both. Set by evoker create.

• A server pack can't be installed as a client, and the other way round.
• Content that only runs on a side the pack doesn't have is refused by add.

game (required)

Key	Meaning
version	Minecraft version, e.g. 1.21.4. Changed by evoker upgrade.
loader	vanilla, fabric, quilt, neoforge, paper, purpur or spigot. See Server Software.
build	latest (default) or a pinned build: loader version for Fabric/Quilt/NeoForge, build number for Paper/Purpur/Spigot. Ignored for vanilla.

The client side runs the same loader for fabric, quilt and neoforge. For paper, purpur, spigot and vanilla the client is vanilla Minecraft: plugins go to the server only, and players get resource packs and shaders.

content

Keyed source:name. With no prefix the source is modrinth; the others are hangar and url. See Content Sources.

The short form is just the version: "latest", or a pinned version (the version number Modrinth or Hangar shows). The long form is an object:

Key	Meaning
version	latest or a pinned version. Not used by url entries.
side	client, server or both. Optional: evoker works it out from the source (see Sides); set it only to override. Required for url entries.
optional	true lets players choose whether to install it. Servers always install it if it runs there. Default false.
type	mod, plugin, datapack, resourcepack or shaderpack. Required for url entries; for other sources only when the project is published as more than one type.
url	url entries only: where the file is downloaded from.

Only list what you want; dependencies are resolved into evoker.lock automatically.

What isn't here

evoker.json describes content, never how a particular server or client runs it. Memory, Java, server.properties, eula.txt and similar belong to whoever runs the server; see Servers and Configuration.