Calculator MCP

Calculate MCP

A Model Context Protocol (MCP) server that provides browser automation capabilities using basic calculator feature. This server enables LLMs to interact with calculator. (I actually made it for a test program)

Use Cases

• The test code for to connect MCP feature.
• The toy projects

Example config

<!-- eslint-skip -->

{
  "mcpServers": {
    "calculate": {
      "command": "npx",
      "args": [
        "-y",
        "@wrtnlabs/calculator@latest"
      ]
    }
  }
}

Installation in VS Code

Alternatively, you can install the Playwright MCP server using the VS Code CLI:

# For VS Code
code --add-mcp '{"name":"calculator","command":"npx","args":["-y", "@wrtnlabs/calculator-mcp@latest"]}'

# For VS Code Insiders
code-insiders --add-mcp '{"name":"calculator","command":"npx","args":["-y", "@wrtnlabs/calculator-mcp@latest"]}'

After installation, the Calculator MCP server will be available for use with your GitHub Copilot agent in VS Code.

CLI Options

The Calculator MCP server supports the following command-line options:

• --port <port>: Port to listen on for SSE transport

Running headed browser on Linux w/o DISPLAY

When running headed browser on system w/o display or from worker processes of the IDEs, run the MCP server from environment with the DISPLAY and pass the --port flag to enable SSE transport.

npx @wrtnlabs/calculator-mcp@latest --port 8931

And then in MCP client config, set the url to the SSE endpoint:

<!-- eslint-skip -->

{
  "mcpServers": {
    "calculator": {
      "url": "http://localhost:8931/sse"
    }
  }
}

Programmatic usage with custom transports

import { createServer } from "@wrtnlabs/calculator-mcp";

// ...

const server = createServer({
  name: "calculator",
  version: "1.0.0"
});
transport = new SSEServerTransport("/messages", res);
server.connect(transport);

Tools

• add
• sub
• mul
• div
• mod
• sqrt