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@multiplayer-agent-sdk/mcp-server

v0.1.0

Published

MCP server exposing grounded, read-only guidance about the Multiplayer Agent SDK's adapter interface to coding agents (Claude Code, Cursor, etc).

Vulnerabilities

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Links

Git

Maintainers

nlehnhofnlehnhof

Keywords

mcpmodel-context-protocolmultiplayerai-agentclaude-codecursor

Readme

@multiplayer-agent-sdk/mcp-server

An MCP (Model Context Protocol) server that gives a coding agent (Claude Code, Cursor, etc.) grounded, authoritative guidance about the Multiplayer Agent SDK's adapter interface — so it doesn't have to guess or hallucinate the RoomDefinition contract or which backend adapters exist.

MVP skeleton. This package exposes exactly two read-only tools and does no game-hosting or state management itself. It is intentionally minimal — the "Draft the MCP server skeleton and confirm it loads correctly in Claude Code and Cursor" checklist item, not a full-featured server. More capability (additional tools, resources, prompts) is expected post-MVP.

Tools

  • list_adapters — no input. Returns a JSON list of backend adapters (partykit, colyseus, supabase) and whether each is available now or planned post-MVP.
  • get_room_definition_guide — no input. Returns a markdown guide containing the frozen RoomDefinition/PlayerInfo/RoomOptions TypeScript interfaces (copied verbatim from packages/core/src/types.ts), a complete minimal example (a counter room), and a pointer to @multiplayer-agent-sdk/adapter-partykit's createPartyKitServer / connectPartyKitClient for wiring it up.

Running it standalone

npm run build
node dist/index.js

The server communicates over stdio (no HTTP port). Running it directly from a terminal will appear to hang with no output — that's expected, since it's waiting for an MCP client to speak the protocol on stdin. A clean start (no thrown error, no immediate exit) is the "loads correctly" bar. Press Ctrl+C to stop it.

Using it from Claude Code / Cursor

Either tool can be pointed at this server as a local MCP server via its node dist/index.js entrypoint (or the multiplayer-agent-sdk-mcp bin once this package is installed). Exact registration steps (Claude Code's .mcp.json / claude mcp add, Cursor's MCP settings) are host-specific and out of scope for this package's README.

Development

npm run build       # tsup -> dist/
npm test            # vitest run
npm run typecheck   # tsc --noEmit