MCP Calculator Go

This is a simple calculator implemented in Go that conforms to the Model Context Protocol (MCP). It demonstrates how to build an MCP server using the mcp-go library.

Features

• Performs basic arithmetic operations: addition, subtraction, multiplication, and division.
• Uses github.com/shopspring/decimal for accurate decimal calculations.
• Exposes a single calculate tool with operation, x, and y parameters.
• Uses go-enum to generate enums and related helper methods.
• Provides a Taskfile for convenient build and dependency management.

Building and Running

First you need to install the dependencies described in the task file.

go install github.com/abice/go-enum@latest
go generate ./...

or simply

task deps
task enum

To build the executable, run:

go build -o mcp-calculator-go

or

task build

How to use

1. build mcp binary
2. configure

• VS Code and Client:

{
  "mcpServers": {
    "calculator-go": {
      "command": "/path/to/mcp-calculator-go",
      "args": [],
      "disabled": false,
      "autoApprove": []
    }
  }
}

• Zed

"context_servers": {
  "calculator-go": {
    "command": {
      "path": "/path/to/mcp-calculator-go",
      "args": [],
      "env": {}
    },
    "settings": {}
  }
}