A Model Context Protocol server that provides access to the currently active tab of cmux
Cmux MCP MCP server is a locally run integration for AI assistants that speak the Model Context Protocol. A Model Context Protocol server that provides access to the currently active tab of cmux.
Let Claude run commands, read output, manage tabs/panes/workspaces/windows, and send control characters in your cmux terminal -- all through the Model Context Protocol. Works in the background. No focus stealing.
Once Cmux MCP is connected, these are the calls the assistant has available:
Requirements — The Requirements tool exposed by this serverNotifications — The Notifications tool exposed by this serverBuffer — The Buffer tool exposed by this serverBrowser — The Browser tool exposed by this serverSetup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client. The configuration blocks on this page cover the common clients.
You will need one environment variable: CMUX_PATH. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Among the browser automation options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Cmux MCP's toolset — Requirements, Notifications, Buffer and 1 more — is a fair guide to whether it matches your workflow. It is maintained by daegweon; 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 |
|---|---|
| Requirements | The Requirements tool exposed by this server. |
| Notifications | The Notifications tool exposed by this server. |
| Buffer | The Buffer tool exposed by this server. |
| Browser | The Browser tool exposed by this server. |
{
"mcpServers": {
"cmux-mcp": {
"command": "npx",
"args": ["-y", "cmux-mcp"]
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| CMUX_PATH | Filesystem location the server is allowed to use. | Optional |
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