Swift MCP Server Generator

GitHubOfficialOriginally contributed by @troystaylor as prompts/swift-mcp-server-generator.prompt.md; moved into a skill by pull request #761Distributed by GitHub

Skill
Workflow
Software development
MIT
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From the author

Generate a complete Model Context Protocol server project in Swift using the official MCP Swift SDK package.

— the description by troystaylor

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

This skill provides a template and generation logic for creating a production-ready Model Context Protocol (MCP) server using the official Swift SDK. It includes a modular project structure, boilerplate code for tools, resources, and prompts, and integrates essential Swift libraries for logging and service lifecycle management.

What it does

Generates a standard Swift package structure for an MCP server.
Provides templates for tool, resource, and prompt definitions and handlers.
Integrates swift-log for structured logging.
Implements graceful shutdown using swift-service-lifecycle.
Includes unit testing templates for verifying server handlers.
Provides configuration examples for integration with Claude Desktop.

When to use it

When you need to bootstrap a new MCP server project in Swift.
When you want to implement custom tools, resources, or prompts for an MCP-compatible client.
When you require a standardized project architecture for Swift-based MCP development.

Advantages

Follows modern Swift concurrency patterns using async/await.
Ensures thread safety through actor-based state management.
Includes comprehensive boilerplate to reduce initial setup time.
Provides a clear separation of concerns between definitions and logic.

Usage examples

“Generate a new MCP server project named WeatherServer.”: The agent creates a directory structure with all necessary Swift files, including Package.swift, main.swift, and handler templates customized for the WeatherServer project.

Install

Download the skill as a ZIP:
https://mp-staging.autogineer.com/agent-skills/github/swift-mcp-server-generator/download

Unzip it into the cross-client skills folder of your project:

mkdir -p .agents/skills && unzip swift-mcp-server-generator.zip -d .agents/skills

Documentation by troystaylor

Swift MCP Server Generator

Generate a complete, production-ready MCP server in Swift using the official Swift SDK package.

Project Generation

When asked to create a Swift MCP server, generate a complete project with this structure:

my-mcp-server/
├── Package.swift
├── Sources/
│   └── MyMCPServer/
│       ├── main.swift
│       ├── Server.swift
│       ├── Tools/
│       │   ├── ToolDefinitions.swift
│       │   └── ToolHandlers.swift
│       ├── Resources/
│       │   ├── ResourceDefinitions.swift
│       │   └── ResourceHandlers.swift
│       └── Prompts/
│           ├── PromptDefinitions.swift
│           └── PromptHandlers.swift
├── Tests/
│   └── MyMCPServerTests/
│       └── ServerTests.swift
└── README.md

Package.swift Template

// swift-tools-version: 6.0
import PackageDescription

let package = Package(
    name: "MyMCPServer",
    platforms: [
        .macOS(.v13),
        .iOS(.v16),
        .watchOS(.v9),
        .tvOS(.v16),
        .visionOS(.v1)
    ],
    dependencies: [
        .package(
            url: "https://github.com/modelcontextprotocol/swift-sdk.git",
            from: "0.10.0"
        ),
        .package(
            url: "https://github.com/apple/swift-log.git",
            from: "1.5.0"
        ),
        .package(
            url: "https://github.com/swift-server/swift-service-lifecycle.git",
            from: "2.0.0"
        )
    ],
    targets: [
        .executableTarget(
            name: "MyMCPServer",
            dependencies: [
                .product(name: "MCP", package: "swift-sdk"),
                .product(name: "Logging", package: "swift-log"),
                .product(name: "ServiceLifecycle", package: "swift-service-lifecycle")
            ]
        ),
        .testTarget(
            name: "MyMCPServerTests",
            dependencies: ["MyMCPServer"]
        )
    ]
)

main.swift Template

import MCP
import Logging
import ServiceLifecycle

struct MCPService: Service {
    let server: Server
    let transport: Transport
    
    func run() async throws {
        try await server.start(transport: transport) { clientInfo, capabilities in
            logger.info("Client connected", metadata: [
                "name": .string(clientInfo.name),
                "version": .string(clientInfo.version)
            ])
        }
        
        // Keep service running
        try await Task.sleep(for: .days(365 * 100))
    }
    
    func shutdown() async throws {
        logger.info("Shutting down MCP server")
        await server.stop()
    }
}

var logger = Logger(label: "com.example.mcp-server")
logger.logLevel = .info

do {
    let server = await createServer()
    let transport = StdioTransport(logger: logger)
    let service = MCPService(server: server, transport: transport)
    
    let serviceGroup = ServiceGroup(
        services: [service],
        configuration: .init(
            gracefulShutdownSignals: [.sigterm, .sigint]
        ),
        logger: logger
    )
    
    try await serviceGroup.run()
} catch {
    logger.error("Fatal error", metadata: ["error": .string("\(error)")])
    throw error
}

Server.swift Template

import MCP
import Logging

func createServer() async -> Server {
    let server = Server(
        name: "MyMCPServer",
        version: "1.0.0",
        capabilities: .init(
            prompts: .init(listChanged: true),
            resources: .init(subscribe: true, listChanged: true),
            tools: .init(listChanged: true)
        )
    )
    
    // Register tool handlers
    await registerToolHandlers(server: server)
    
    // Register resource handlers
    await registerResourceHandlers(server: server)
    
    // Register prompt handlers
    await registerPromptHandlers(server: server)
    
    return server
}

ToolDefinitions.swift Template

import MCP

func getToolDefinitions() -> [Tool] {
    [
        Tool(
            name: "greet",
            description: "Generate a greeting message",
            inputSchema: .object([
                "type": .string("object"),
                "properties": .object([
                    "name": .object([
                        "type": .string("string"),
                        "description": .string("Name to greet")
                    ])
                ]),
                "required": .array([.string("name")])
            ])
        ),
        Tool(
            name: "calculate",
            description: "Perform mathematical calculations",
            inputSchema: .object([
                "type": .string("object"),
                "properties": .object([
                    "operation": .object([
                        "type": .string("string"),
                        "enum": .array([
                            .string("add"),
                            .string("subtract"),
                            .string("multiply"),
                            .string("divide")
                        ]),
                        "description": .string("Operation to perform")
                    ]),
                    "a": .object([
                        "type": .string("number"),
                        "description": .string("First operand")
                    ]),
                    "b": .object([
                        "type": .string("number"),
                        "description": .string("Second operand")
                    ])
                ]),
                "required": .array([
                    .string("operation"),
                    .string("a"),
                    .string("b")
                ])
            ])
        )
    ]
}

ToolHandlers.swift Template

import MCP
import Logging

private let logger = Logger(label: "com.example.mcp-server.tools")

func registerToolHandlers(server: Server) async {
    await server.withMethodHandler(ListTools.self) { _ in
        logger.debug("Listing available tools")
        return .init(tools: getToolDefinitions())
    }
    
    await server.withMethodHandler(CallTool.self) { params in
        logger.info("Tool called", metadata: ["name": .string(params.name)])
        
        switch params.name {
        case "greet":
            return handleGreet(params: params)
            
        case "calculate":
            return handleCalculate(params: params)
            
        default:
            logger.warning("Unknown tool requested", metadata: ["name": .string(params.name)])
            return .init(
                content: [.text("Unknown tool: \(params.name)")],
                isError: true
            )
        }
    }
}

private func handleGreet(params: CallTool.Params) -> CallTool.Result {
    guard let name = params.arguments?["name"]?.stringValue else {
        return .init(
            content: [.text("Missing 'name' parameter")],
            isError: true
        )
    }
    
    let greeting = "Hello, \(name)! Welcome to MCP."
    logger.debug("Generated greeting", metadata: ["name": .string(name)])
    
    return .init(
        content: [.text(greeting)],
        isError: false
    )
}

private func handleCalculate(params: CallTool.Params) -> CallTool.Result {
    guard let operation = params.arguments?["operation"]?.stringValue,
          let a = params.arguments?["a"]?.doubleValue,
          let b = params.arguments?["b"]?.doubleValue else {
        return .init(
            content: [.text("Missing or invalid parameters")],
            isError: true
        )
    }
    
    let result: Double
    switch operation {
    case "add":
        result = a + b
    case "subtract":
        result = a - b
    case "multiply":
        result = a * b
    case "divide":
        guard b != 0 else {
            return .init(
                content: [.text("Division by zero")],
                isError: true
            )
        }
        result = a / b
    default:
        return .init(
            content: [.text("Unknown operation: \(operation)")],
            isError: true
        )
    }
    
    logger.debug("Calculation performed", metadata: [
        "operation": .string(operation),
        "result": .string("\(result)")
    ])
    
    return .init(
        content: [.text("Result: \(result)")],
        isError: false
    )
}

ResourceDefinitions.swift Template

import MCP

func getResourceDefinitions() -> [Resource] {
    [
        Resource(
            name: "Example Data",
            uri: "resource://data/example",
            description: "Example resource data",
            mimeType: "application/json"
        ),
        Resource(
            name: "Configuration",
            uri: "resource://config",
            description: "Server configuration",
            mimeType: "application/json"
        )
    ]
}

ResourceHandlers.swift Template

import MCP
import Logging
import Foundation

private let logger = Logger(label: "com.example.mcp-server.resources")

actor ResourceState {
    private var subscriptions: Set<String> = []
    
    func addSubscription(_ uri: String) {
        subscriptions.insert(uri)
    }
    
    func removeSubscription(_ uri: String) {
        subscriptions.remove(uri)
    }
    
    func isSubscribed(_ uri: String) -> Bool {
        subscriptions.contains(uri)
    }
}

private let state = ResourceState()

func registerResourceHandlers(server: Server) async {
    await server.withMethodHandler(ListResources.self) { params in
        logger.debug("Listing available resources")
        return .init(resources: getResourceDefinitions(), nextCursor: nil)
    }
    
    await server.withMethodHandler(ReadResource.self) { params in
        logger.info("Reading resource", metadata: ["uri": .string(params.uri)])
        
        switch params.uri {
        case "resource://data/example":
            let jsonData = """
            {
                "message": "Example resource data",
                "timestamp": "\(Date())"
            }
            """
            return .init(contents: [
                .text(jsonData, uri: params.uri, mimeType: "application/json")
            ])
            
        case "resource://config":
            let config = """
            {
                "serverName": "MyMCPServer",
                "version": "1.0.0"
            }
            """
            return .init(contents: [
                .text(config, uri: params.uri, mimeType: "application/json")
            ])
            
        default:
            logger.warning("Unknown resource requested", metadata: ["uri": .string(params.uri)])
            throw MCPError.invalidParams("Unknown resource URI: \(params.uri)")
        }
    }
    
    await server.withMethodHandler(ResourceSubscribe.self) { params in
        logger.info("Client subscribed to resource", metadata: ["uri": .string(params.uri)])
        await state.addSubscription(params.uri)
        return .init()
    }
    
    await server.withMethodHandler(ResourceUnsubscribe.self) { params in
        logger.info("Client unsubscribed from resource", metadata: ["uri": .string(params.uri)])
        await state.removeSubscription(params.uri)
        return .init()
    }
}

PromptDefinitions.swift Template

import MCP

func getPromptDefinitions() -> [Prompt] {
    [
        Prompt(
            name: "code-review",
            description: "Generate a code review prompt",
            arguments: [
                .init(name: "language", description: "Programming language", required: true),
                .init(name: "focus", description: "Review focus area", required: false)
            ]
        )
    ]
}

PromptHandlers.swift Template

import MCP
import Logging

private let logger = Logger(label: "com.example.mcp-server.prompts")

func registerPromptHandlers(server: Server) async {
    await server.withMethodHandler(ListPrompts.self) { params in
        logger.debug("Listing available prompts")
        return .init(prompts: getPromptDefinitions(), nextCursor: nil)
    }
    
    await server.withMethodHandler(GetPrompt.self) { params in
        logger.info("Getting prompt", metadata: ["name": .string(params.name)])
        
        switch params.name {
        case "code-review":
            return handleCodeReviewPrompt(params: params)
            
        default:
            logger.warning("Unknown prompt requested", metadata: ["name": .string(params.name)])
            throw MCPError.invalidParams("Unknown prompt: \(params.name)")
        }
    }
}

private func handleCodeReviewPrompt(params: GetPrompt.Params) -> GetPrompt.Result {
    guard let language = params.arguments?["language"]?.stringValue else {
        return .init(
            description: "Missing language parameter",
            messages: []
        )
    }
    
    let focus = params.arguments?["focus"]?.stringValue ?? "general quality"
    
    let description = "Code review for \(language) with focus on \(focus)"
    let messages: [Prompt.Message] = [
        .user("Please review this \(language) code with focus on \(focus)."),
        .assistant("I'll review the code focusing on \(focus). Please share the code."),
        .user("Here's the code to review: [paste code here]")
    ]
    
    logger.debug("Generated code review prompt", metadata: [
        "language": .string(language),
        "focus": .string(focus)
    ])
    
    return .init(description: description, messages: messages)
}

ServerTests.swift Template

import XCTest
@testable import MyMCPServer

final class ServerTests: XCTestCase {
    func testGreetTool() async throws {
        let params = CallTool.Params(
            name: "greet",
            arguments: ["name": .string("Swift")]
        )
        
        let result = handleGreet(params: params)
        
        XCTAssertFalse(result.isError ?? true)
        XCTAssertEqual(result.content.count, 1)
        
        if case .text(let message) = result.content[0] {
            XCTAssertTrue(message.contains("Swift"))
        } else {
            XCTFail("Expected text content")
        }
    }
    
    func testCalculateTool() async throws {
        let params = CallTool.Params(
            name: "calculate",
            arguments: [
                "operation": .string("add"),
                "a": .number(5),
                "b": .number(3)
            ]
        )
        
        let result = handleCalculate(params: params)
        
        XCTAssertFalse(result.isError ?? true)
        XCTAssertEqual(result.content.count, 1)
        
        if case .text(let message) = result.content[0] {
            XCTAssertTrue(message.contains("8"))
        } else {
            XCTFail("Expected text content")
        }
    }
    
    func testDivideByZero() async throws {
        let params = CallTool.Params(
            name: "calculate",
            arguments: [
                "operation": .string("divide"),
                "a": .number(10),
                "b": .number(0)
            ]
        )
        
        let result = handleCalculate(params: params)
        
        XCTAssertTrue(result.isError ?? false)
    }
}

README.md Template

# MyMCPServer

A Model Context Protocol server built with Swift.

## Features

- ✅ Tools: greet, calculate
- ✅ Resources: example data, configuration
- ✅ Prompts: code-review
- ✅ Graceful shutdown with ServiceLifecycle
- ✅ Structured logging with swift-log
- ✅ Full test coverage

## Requirements

- Swift 6.0+
- macOS 13+, iOS 16+, or Linux

## Installation

```bash
swift build -c release

Usage

Run the server:

swift run

Or with logging:

LOG_LEVEL=debug swift run

Testing

swift test

Development

The server uses:

MCP Swift SDK - MCP protocol implementation
swift-log - Structured logging
swift-service-lifecycle - Graceful shutdown

Project Structure

Sources/MyMCPServer/main.swift - Entry point with ServiceLifecycle
Sources/MyMCPServer/Server.swift - Server configuration
Sources/MyMCPServer/Tools/ - Tool definitions and handlers
Sources/MyMCPServer/Resources/ - Resource definitions and handlers
Sources/MyMCPServer/Prompts/ - Prompt definitions and handlers
Tests/ - Unit tests

License

MIT


## Generation Instructions

1. **Ask for project name and description**
2. **Generate all files** with proper naming
3. **Use actor-based state** for thread safety
4. **Include comprehensive logging** with swift-log
5. **Implement graceful shutdown** with ServiceLifecycle
6. **Add tests** for all handlers
7. **Use modern Swift concurrency** (async/await)
8. **Follow Swift naming conventions** (camelCase, PascalCase)
9. **Include error handling** with proper MCPError usage
10. **Document public APIs** with doc comments

## Build and Run

```bash
# Build
swift build

# Run
swift run

# Test
swift test

# Release build
swift build -c release

# Install
swift build -c release
cp .build/release/MyMCPServer /usr/local/bin/

Integration with Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "my-mcp-server": {
      "command": "/path/to/MyMCPServer"
    }
  }
}

Files

ATTRIBUTION.mdAdded by AutoGineer1.2 KiB
LICENSELicence file added by AutoGineer1.0 KiB
SKILL.md17.2 KiB

LICENSE

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.

Requirements and compatibility

Written for: GitHub Copilot

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Needs an MCP server

Security

No issues found by our static scan· No issues found

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

Attribution and licence

Originally contributed by

@troystaylor as prompts/swift-mcp-server-generator.prompt.md moved into a skill by pull request #761

Publisher

GitHub (Official)

Distributed by

GitHub

Source

github/awesome-copilot · skills/swift-mcp-server-generator · commit 797337f

Licence

MIT License (redistribution allowed)

LICENSE (added by AutoGineer from LICENSE)
ATTRIBUTION.md (written by AutoGineer)

Synced

2026-11-08

Contributors

troystaylor

AutoGineer is not affiliated with or endorsed by troystaylor or GitHub.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download swift-mcp-server-generator.zip

From the author

AutoGineer summary

What it does

When to use it

Advantages

Usage examples

Install

Documentation by troystaylor

Swift MCP Server Generator

Project Generation

Package.swift Template

main.swift Template

Server.swift Template

ToolDefinitions.swift Template

ToolHandlers.swift Template

ResourceDefinitions.swift Template

ResourceHandlers.swift Template

PromptDefinitions.swift Template

PromptHandlers.swift Template

ServerTests.swift Template

README.md Template

Usage

Testing

Development

Project Structure

License

Integration with Claude Desktop

Files

LICENSE

Requirements and compatibility

Security

Attribution and licence

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