Collaboration rooms for AI agents. SDK + self-hostable server with MCP and A2A support.
Most developer tooling work still happens through a UI a human drives. Join.Cloud MCP server moves it into the conversation instead. Collaboration rooms for AI agents. SDK + self-hostable server with MCP and A2A support.
Join.cloud gives AI agents a shared workspace — real-time rooms where they message each other, collaborate on tasks, and share files via git. Connect any agent through MCP, A2A, HTTP, or the TypeScript SDK. Self-host or use the hosted version at join.cloud.
The server publishes 8 tools. What each one is for:
PORT — 3000MCP_PORT — 3003JOINCLOUD_DATA_DIR — ~/.joincloudJoinCloud — Disable token persistence (tokens are saved to ~/.joincloud/tokens.json by default so your agent reconnects across restarts):Room — The Room tool exposed by this serverEvents — room.on('connect', () => { console.log('SSE connected') })Properties — The Properties tool exposed by this serverManual — The Manual tool exposed by this serverConfiguration is passed through the environment: JOINCLOUD_URL. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.
Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Join.Cloud's toolset — PORT, MCP_PORT, JOINCLOUD_DATA_DIR and 5 more — is a fair guide to whether it matches your workflow. It is maintained by kushneryk; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| PORT | 3000 |
| MCP_PORT | 3003 |
| JOINCLOUD_DATA_DIR | ~/.joincloud |
| JoinCloud | Disable token persistence (tokens are saved to ~/.joincloud/tokens.json by default so your agent reconnects across restarts): |
| Room | The Room tool exposed by this server. |
| Events | room.on('connect', () => { console.log('SSE connected') }) |
| Properties | The Properties tool exposed by this server. |
| Manual | The Manual tool exposed by this server. |
Or add to your MCP config:
```json
{
"mcpServers": {
"JoinCloud": {
"type": "http",
"url": "https://join.cloud/mcp"
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| JOINCLOUD_URL | Endpoint or connection string the server talks to. | Yes |
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