Go MCP server project generator

Author's original introduction

Generate a complete Go MCP server project with proper structure, dependencies, and implementation using the official github.com/modelcontextprotocol/go-sdk.

SkillPi interpretation

Tasks

Generate a Go module layout, server setup, typed tools, configuration, README and basic tests.

Audience

Go developers building an MCP server project.

Inputs and outputs

Input: project name, server configuration and tool requirements. Output: Go project files, documentation and a test structure.

Software, accounts and paid services

The template specifies Go 1.23 and github.com/modelcontextprotocol/go-sdk v1.0.0. Dependencies need to be obtained; no mandatory paid service is stated. Confirm actual file access and external-service permissions in your host. Domains referenced in the documents (not a runtime allowlist): No HTTP(S) domain stated.

Limits and differences

An opinionated project template rather than a deployed service. SDK versions and generated code must be checked before use; the skill has not been run here.

Testing

Not tested

Security rating and access scope

caution · Static evidence review; not a runtime safety guarantee.

The template specifies Go 1.23 and github.com/modelcontextprotocol/go-sdk v1.0.0. Dependencies need to be obtained; no mandatory paid service is stated. Confirm actual file access and external-service permissions in your host. Domains referenced in the documents (not a runtime allowlist): No HTTP(S) domain stated.

Before use, confirm and authorize actual file access, external services and network destinations in your host. This review grants no runtime permissions.

Original SKILL.md

---
name: go-mcp-server-generator
description: 'Generate a complete Go MCP server project with proper structure, dependencies, and implementation using the official github.com/modelcontextprotocol/go-sdk.'
---

# Go MCP Server Project Generator

Generate a complete, production-ready Model Context Protocol (MCP) server project in Go.

## Project Requirements

You will create a Go MCP server with:

1. **Project Structure**: Proper Go module layout
2. **Dependencies**: Official MCP SDK and necessary packages
3. **Server Setup**: Configured MCP server with transports
4. **Tools**: At least 2-3 useful tools with typed inputs/outputs
5. **Error Handling**: Proper error handling and context usage
6. **Documentation**: README with setup and usage instructions
7. **Testing**: Basic test structure

## Template Structure

```
myserver/
├── go.mod
├── go.sum
├── main.go
├── tools/
│   ├── tool1.go
│   └── tool2.go
├── resources/
│   └── resource1.go
├── config/
│   └── config.go
├── README.md
└── main_test.go
```

## go.mod Template

```go
module github.com/yourusername/{{PROJECT_NAME}}

go 1.23

require (
    github.com/modelcontextprotocol/go-sdk v1.0.0
)
```

## main.go Template

```go
package main

import (
    "context"
    "log"
    "os"
    "os/signal"
    "syscall"

    "github.com/modelcontextprotocol/go-sdk/mcp"
    "github.com/yourusername/{{PROJECT_NAME}}/config"
    "github.com/yourusername/{{PROJECT_NAME}}/tools"
)

func main() {
    cfg := config.Load()
    
    ctx, cancel := context.WithCancel(context.Background())
    defer cancel()

    // Handle graceful shutdown
    sigCh := make(chan os.Signal, 1)
    signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
    go func() {
        <-sigCh
        log.Println("Shutting down...")
        cancel()
    }()

    // Create server
    server := mcp.NewServer(
        &mcp.Implementation{
            Name:    cfg.ServerName,
            Version: cfg.Version,
        },
        &mcp.Options{
            Capabilities: &mcp.ServerCapabilities{
                Tools:     &mcp.ToolsCapability{},
                Resources: &mcp.ResourcesCapability{},
                Prompts:   &mcp.PromptsCapability{},
            },
        },
    )

    // Register tools
    tools.RegisterTools(server)

    // Run server
    transport := &mcp.StdioTransport{}
    if err := server.Run(ctx, transport); err != nil {
        log.Fatalf("Server error: %v", err)
    }
}
```

## tools/tool1.go Template

```go
package tools

import (
    "context"
    "fmt"

    "github.com/modelcontextprotocol/go-sdk/mcp"
)

type Tool1Input struct {
    Param1 string `json:"param1" jsonschema:"required,description=First parameter"`
    Param2 int    `json:"param2,omitempty" jsonschema:"description=Optional second parameter"`
}

type Tool1Output struct {
    Result string `json:"result" jsonschema:"description=The result of the operation"`
    Status string `json:"status" jsonschema:"description=Operation status"`
}

func Tool1Handler(ctx context.Context, req *mcp.CallToolRequest, input Tool1Input) (
    *mcp.CallToolResult,
    Tool1Output,
    error,
) {
    // Validate input
    if input.Param1 == "" {
        return nil, Tool1Output{}, fmt.Errorf("param1 is required")
    }

    // Check context
    if ctx.Err() != nil {
        return nil, Tool1Output{}, ctx.Err()
    }

    // Perform operation
    result := fmt.Sprintf("Processed: %s", input.Param1)

    return nil, Tool1Output{
        Result: result,
        Status: "success",
    }, nil
}

func RegisterTool1(server *mcp.Server) {
    mcp.AddTool(server,
        &mcp.Tool{
            Name:        "tool1",
            Description: "Description of what tool1 does",
        },
        Tool1Handler,
    )
}
```

## tools/registry.go Template

```go
package tools

import "github.com/modelcontextprotocol/go-sdk/mcp"

func RegisterTools(server *mcp.Server) {
    RegisterTool1(server)
    RegisterTool2(server)
    // Register additional tools here
}
```

## config/config.go Template

```go
package config

import "os"

type Config struct {
    ServerName string
    Version    string
    LogLevel   string
}

func Load() *Config {
    return &Config{
        ServerName: getEnv("SERVER_NAME", "{{PROJECT_NAME}}"),
        Version:    getEnv("VERSION", "v1.0.0"),
        LogLevel:   getEnv("LOG_LEVEL", "info"),
    }
}

func getEnv(key, defaultValue string) string {
    if value := os.Getenv(key); value != "" {
        return value
    }
    return defaultValue
}
```

## main_test.go Template

```go
package main

import (
    "context"
    "testing"

    "github.com/yourusername/{{PROJECT_NAME}}/tools"
)

func TestTool1Handler(t *testing.T) {
    ctx := context.Background()
    input := tools.Tool1Input{
        Param1: "test",
        Param2: 42,
    }

    result, output, err := tools.Tool1Handler(ctx, nil, input)
    if err != nil {
        t.Fatalf("Tool1Handler failed: %v", err)
    }

    if output.Status != "success" {
        t.Errorf("Expected status 'success', got '%s'", output.Status)
    }

    if result != nil {
        t.Error("Expected result to be nil")
    }
}
```

## README.md Template

```markdown
# {{PROJECT_NAME}}

A Model Context Protocol (MCP) server built with Go.

## Description

{{PROJECT_DESCRIPTION}}

## Installation

\`\`\`bash
go mod download
go build -o {{PROJECT_NAME}}
\`\`\`

## Usage

Run the server with stdio transport:

\`\`\`bash
./{{PROJECT_NAME}}
\`\`\`

## Configuration

Configure via environment variables:

- `SERVER_NAME`: Server name (default: "{{PROJECT_NAME}}")
- `VERSION`: Server version (default: "v1.0.0")
- `LOG_LEVEL`: Logging level (default: "info")

## Available Tools

### tool1
{{TOOL1_DESCRIPTION}}

**Input:**
- `param1` (string, required): First parameter
- `param2` (int, optional): Second parameter

**Output:**
- `result` (string): Operation result
- `status` (string): Status of the operation

## Development

Run tests:

\`\`\`bash
go test ./...
\`\`\`

Build:

\`\`\`bash
go build -o {{PROJECT_NAME}}
\`\`\`

## License

MIT
```

## Generation Instructions

When generating a Go MCP server:

1. **Initialize Module**: Create `go.mod` with proper module path
2. **Structure**: Follow the template directory structure
3. **Type Safety**: Use structs with JSON schema tags for all inputs/outputs
4. **Error Handling**: Validate inputs, check context, wrap errors
5. **Documentation**: Add clear descriptions and examples
6. **Testing**: Include at least one test per tool
7. **Configuration**: Use environment variables for config
8. **Logging**: Use structured logging (log/slog)
9. **Graceful Shutdown**: Handle signals properly
10. **Transport**: Default to stdio, document alternatives

## Best Practices

- Keep tools focused and single-purpose
- Use descriptive names for types and functions
- Include JSON schema documentation in struct tags
- Always respect context cancellation
- Return descriptive errors
- Keep main.go minimal, logic in packages
- Write tests for tool handlers
- Document all exported functions

Copyright and license notice

MIT License

Copyright GitHub, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.