Tabletop RPG engine over MCP: dice, combat, stress, clocks, world generation, four bundled worlds
Connect Runs on your machine
claude mcp add mythxengine -e RPG_MCP_DATA_DIR=<RPG_MCP_DATA_DIR> -- npx -y @mythxengine/[email protected]{
"mcpServers": {
"mythxengine": {
"command": "npx",
"args": [
"-y",
"@mythxengine/[email protected]"
],
"env": {
"RPG_MCP_DATA_DIR": "<RPG_MCP_DATA_DIR>"
}
}
}
}{
"mcpServers": {
"mythxengine": {
"command": "npx",
"args": [
"-y",
"@mythxengine/[email protected]"
],
"env": {
"RPG_MCP_DATA_DIR": "<RPG_MCP_DATA_DIR>"
}
}
}
}{
"servers": {
"mythxengine": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@mythxengine/[email protected]"
],
"env": {
"RPG_MCP_DATA_DIR": "<RPG_MCP_DATA_DIR>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
RPG_MCP_DATA_DIROptional | Where sessions and world packs are stored (default: ~/.mythxengine/data) |
Details
| Package | @mythxengine/[email protected] (NPM, stdio) |
| Package | https://github.com/protoLabsAI/mythx-mcp/releases/download/v0.3.0/[email protected] (MCPB, stdio) |
| First published | 12 Jul 2026 |
| Last updated | 12 Jul 2026 |
| Registry name | io.github.protoLabsAI/mythxengine |
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