Serverless P2P session multiplayer for AI coding agents - one MCP server, any harness (Claude Code, Codex, anything MCP). LTS protocol.
View on GitHub ↗Session multiplayer for AI coding agents. Your agent session and a friend's — any harness that speaks MCP (Claude Code and Codex are just the two with bundled adapters), any mix of accounts and machines, anywhere on the internet — exchange messages over a direct, end-to-end encrypted P2P connection. No relay, no central server, nothing to host, nothing to sign up for.
It works just as well entirely on your own device: two of your own sessions, in different projects or different harnesses, can share a room — a Claude Code session coordinating with a Codex session three terminals over is the same mechanism as a friend across the internet.
Built on Hyperswarm: peers find each other through a public BitTorrent-style DHT, hole-punch a direct UDP connection, and talk over Noise-encrypted sockets. Exposed to agents as an MCP server — the same server on every harness, so rooms mix harnesses freely.
Current release: v0.3.0 (LTS) — the wire protocol is specified in PROTOCOL.md and frozen for 0.3.x. Fully interoperable with claude-together v0.3, this project's ancestor: a claude-together peer and a session-multiplayer peer can share a room.
Harness Registration Delivery --------- Claude Code npm run register:claude Hooks inject messages live: interrupt mid-turn, normal at turn end, passive waits in the inbox. Plus /sm- slash commands. OpenAI Codex npm run register:codex No hook system: messages land in the inbox; the agent reads them with checkmessages (tool descriptions tell it to poll; an AGENTS.md line makes it habitual). OpenCode npm run register:opencode Same inbox + checkmes
From the project README.
Add the radar badge to your README — it shows your project was picked up by MCP Radar and links to this page:
[](https://mcp.liqiwa.com/s/wybe-labs--session-multiplayer.html)
Open-source MCP server for comparing products and asking the buyer before purchase.
sv-number/mcp-serverMCP server for AI agents that need a phone number: order a private number in 200+ countries, read the SMS verification code, hand it back. The widest country coverage in the category, and you can chec
vibeinging/deepseek-harness-desktop-appDeepSeek Harness Desktop App: a local AI desktop workspace for DSH Sessions, projects, files, web research, plugins, and Office artifacts.
shlokkhemani/rabbitholeAn infinite canvas for learning — select text, ask, and answers branch out as documents. MCP server for Claude Code, Codex, and any agent.
livetennisapi/livetennisapi-mcpMCP server for the Live Tennis API — give Claude, Cursor and other LLM agents real-time tennis scores, odds and model win-probability
shixinnt/codex-image-context-runtimeA Codex plugin and local MCP runtime for context-bounded image generation and inspection.
The top new MCP servers of the week, every Monday. No spam, unsubscribe anytime.