io.github.cyanheads/clipboard-mcp-server MCP Server

io.github.cyanheads/clipboard-mcp-server

Repository Registry

What is the io.github.cyanheads/clipboard-mcp-server MCP server?

Read, write, and inspect the system clipboard on macOS, Linux (X11/Wayland), and Windows via MCP.

How to install io.github.cyanheads/clipboard-mcp-server

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

MCP_LOG_LEVEL
Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').
CLIPBOARD_READ_ONLY
Serve the clipboard read-only. When true, clipboard_write is not registered: it is absent from tools/list and uncallable, though still listed in a disabled state on the manifest and landing page. Accepts true/false/1/0/yes/no/on/off.
MCP_HTTP_HOST
The hostname for the HTTP server.
MCP_HTTP_PORT
The port to run the HTTP server on.
MCP_HTTP_ENDPOINT_PATH
The endpoint path for the MCP server.
MCP_AUTH_MODE
Authentication mode to use: 'none', 'jwt', or 'oauth'.
MCP_HTTP_MAX_BODY_BYTES
Maximum inbound JSON-RPC request body in bytes. Defaults to 7 MiB so a full-size clipboard_write survives worst-case JSON escaping; 0 disables the guard.
MCP_SESSION_MODE
HTTP session mode: 'auto', 'stateful', or 'stateless'. 'auto' resolves to 'stateful'. This server defaults to 'stateless'.

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "clipboard-mcp-server": {
      "command": "node",
      "args": [
        "-y",
        "@cyanheads/clipboard-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "CLIPBOARD_READ_ONLY": "<YOUR_CLIPBOARD_READ_ONLY>",
        "MCP_HTTP_HOST": "<YOUR_MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<YOUR_MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<YOUR_MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<YOUR_MCP_AUTH_MODE>",
        "MCP_HTTP_MAX_BODY_BYTES": "<YOUR_MCP_HTTP_MAX_BODY_BYTES>",
        "MCP_SESSION_MODE": "<YOUR_MCP_SESSION_MODE>"
      }
    }
  }
}

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