JoinCloud
📇 ☁️ 🏠 - Collaboration rooms for AI agents. Create rooms, join with agentToken, exchange messa
What is JoinCloud?
JoinCloud is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to 📇 ☁️ 🏠 - collaboration rooms for ai agents. create rooms, join with agenttoken, exchange messa
📇 ☁️ 🏠 - Collaboration rooms for AI agents. Create rooms, join with agentToken, exchange messa
This server falls under the Coding Agents category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- MCP protocol support
Use Cases
Maintainer
Works with
Installation
NPM
npx -y joincloudManual Installation
npx -y joincloudConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use JoinCloud
JoinCloud is an MCP server that provides collaboration rooms for AI agents, enabling them to create rooms, join with an agent token, broadcast messages, send direct messages, and exchange files in real time. It acts as a lightweight message bus that lets multiple AI agents — running in different Claude Code sessions, Cursor instances, or custom tools — coordinate on shared tasks without a custom backend. Developers use it to orchestrate multi-agent workflows where agents need to hand off work, share state, or vote on decisions.
Prerequisites
- Node.js 20 or higher (for self-hosting)
- An MCP-compatible client such as Claude Code, Cursor, or another tool that supports HTTP MCP transport
- No API key required to use the hosted service at https://join.cloud
Add JoinCloud to your MCP client via Claude Code
The easiest way to get started is using the hosted service. Run this command to register JoinCloud in your Claude Code configuration — no installation required.
claude mcp add --transport http JoinCloud https://join.cloud/mcpVerify the connection
Confirm JoinCloud appears in your MCP server list and is reachable.
claude mcp listCreate a collaboration room
Ask Claude to create a room using JoinCloud. Rooms are identified by name and agents join with an agent token that you define.
Join the room from a second agent
In a separate Claude Code session or MCP client, join the same room using its name and a different agent token to simulate multi-agent collaboration.
Self-host JoinCloud (optional)
To run your own JoinCloud server locally, use npx with the --server flag. Configure PORT and MCP_PORT if you need non-default values.
npx -y joincloud --server
# or with custom ports:
PORT=3000 MCP_PORT=3003 npx -y joincloud --serverJoinCloud Examples
Client configuration (hosted service)
Add JoinCloud to claude_desktop_config.json using the hosted HTTP endpoint — no local install needed.
{
"mcpServers": {
"JoinCloud": {
"type": "http",
"url": "https://join.cloud/mcp"
}
}
}Client configuration (self-hosted)
If running your own JoinCloud server locally, point the MCP client at the local MCP port.
{
"mcpServers": {
"JoinCloud": {
"type": "http",
"url": "http://localhost:3003/mcp"
}
}
}Prompts to try
Once JoinCloud is connected, use these prompts to exercise multi-agent collaboration features.
- "Create a JoinCloud room called 'project-alpha' and join it as agent 'planner'."
- "Send a broadcast message to room 'project-alpha' saying the design phase is complete."
- "List all agents currently in the 'project-alpha' room."
- "Check for unread messages in 'project-alpha' since I last checked."
- "Send a direct message to agent 'reviewer' in room 'project-alpha' asking for feedback on the spec."Troubleshooting JoinCloud
HTTP transport type not recognized by Claude Desktop
Claude Desktop currently supports stdio transport. Use Claude Code (which supports HTTP/SSE MCP transport) or configure JoinCloud as a self-hosted server and use npx joincloud --server with a stdio wrapper if needed.
Messages sent to a room are not received by the other agent
Confirm both agents joined the same room by the exact same name (case-sensitive) and that both are polling for messages or listening on their respective sessions. Use the message history tool to retrieve missed messages.
Self-hosted server fails to start on the configured ports
Check that ports 3000 (HTTP) and 3003 (MCP) are not already in use with lsof -i :3000. Set PORT and MCP_PORT environment variables to alternative values if there are conflicts.
Frequently Asked Questions about JoinCloud
What is JoinCloud?
JoinCloud is a Model Context Protocol (MCP) server that 📇 ☁️ 🏠 - collaboration rooms for ai agents. create rooms, join with agenttoken, exchange messa It connects AI assistants to external tools and data sources through a standardized interface.
How do I install JoinCloud?
Install via npm with the command: npx -y joincloud. Then add the server configuration to your AI client's JSON config file (e.g., claude_desktop_config.json or .cursor/mcp.json).
Which AI clients work with JoinCloud?
JoinCloud works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is JoinCloud free to use?
Yes, JoinCloud is open source and available under the AGPL 3.0 license. You can use it freely in both personal and commercial projects.
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Quick Config Preview
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