I want to contribute a C++ MCP SDK that is written in C++ 17, featuring simplicity and ease of use, layered architecture, and the ability to modify different modules as needed.

[wjd6910502]

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Discussion Topic

Hi everyone, I want to contribute a C++ client SDK that I implemented. It's built on an open-source framework with abstraction, includes comprehensive unit tests, and has complete logging output with proper formatting. If I want to contribute this to the community, who should I contact and what's the process to submit a PR for code review so others can use it?

[wjd6910502]

这是写的代码整体结构，目前已经完成所有单元测试

[wjd6910502]

🎯 Overview

This pull request introduces a comprehensive C++ implementation of the Model Context Protocol (MCP) specification, providing both client and server capabilities with multiple transport options. This SDK enables C++ developers to easily integrate MCP functionality into their applications.

🚀 Key Features

✅ Complete MCP Protocol Implementation

• Full 2024-11-05 Specification Compliance: Implements the latest MCP protocol specification
• JSON-RPC 2.0 Foundation: Built on robust JSON-RPC 2.0 messaging standard
• Type-Safe C++17 API: Modern C++ with strong typing and RAII principles
• Cross-Platform Support: Works on Windows, macOS, and Linux

✅ Multi-Transport Architecture

• IPC (Inter-Process Communication): High-performance local communication
• HTTP/HTTPS Support: Web-based communication with SSE (Server-Sent Events)
• Unified Transport Interface: Single API for all transport types
• Automatic Transport Selection: Smart fallback between transport methods

✅ Comprehensive Client & Server Support

• MCP Client: Full client implementation with tool calling, resource access, and prompt handling
• MCP Server: Extensible server framework with filesystem server implementation
• File System Operations: Complete filesystem tools (read, write, list, create directories)
• Security Features: Path validation and permission controls

✅ Production-Ready Features

• Robust Error Handling: Comprehensive error handling with detailed messages
• Multi-Level Logging: Configurable logging with file and console output
• Configuration Management: JSON-based configuration system
• Unit Testing: Comprehensive test suite with Google Test
• Documentation: Extensive documentation and examples

📁 Project Structure

cpp_mcp_sdk/
├── client/                 # MCP Client implementation
├── server/                 # MCP Server implementation  
├── transport/              # Unified transport layer
├── mcp_protocol/           # Core MCP protocol definitions
├── ipc/                    # IPC communication module
├── net/                    # Network communication module
├── log/                    # Logging system
├── common/                 # Shared utilities
└── 3thirdparty/           # Third-party dependencies

🔧 Technical Implementation

Architecture Highlights

• Modular Design: Clean separation of concerns with independent modules
• Header-Only Dependencies: Minimal external dependencies (nlohmann/json, httplib)
• CMake Build System: Modern CMake with proper dependency management
• Cross-Platform: Platform-agnostic implementation using standard C++

Transport Layer

• Unified Interface: Single Transport class handles all communication types
• Connection Management: Robust connection handling with retry logic
• Health Monitoring: Built-in health checks and connection monitoring
• Async Support: Future-based async operations for non-blocking calls

Protocol Implementation

• Complete MCP Methods: All standard MCP methods implemented
• Tool Management: Dynamic tool registration and calling
• Resource Handling: URI-based resource management
• Notification System: Real-time event notifications

📊 Code Quality

Metrics

• Lines of Code: ~15,000+ lines of C++ code
• Test Coverage: Comprehensive unit tests for all modules
• Documentation: Extensive inline documentation and examples
• Memory Safety: RAII patterns and smart pointers throughout

Code Standards

• C++17 Standard: Modern C++ features and best practices
• Consistent Naming: Clear, descriptive naming conventions
• Error Handling: Comprehensive error handling with custom exceptions
• Logging: Structured logging with multiple output targets

🧪 Testing

Test Suite

• Unit Tests: Individual module testing with Google Test
• Integration Tests: End-to-end functionality testing
• Example Programs: Working examples for all features
• Cross-Platform Testing: Verified on multiple platforms

Test Coverage

• ✅ Transport layer (IPC, HTTP, SSE)
• ✅ MCP protocol implementation
• ✅ Client and server functionality
• ✅ File system operations
• ✅ Error handling and edge cases
• ✅ Configuration management

📚 Documentation

Comprehensive Documentation

• README.md: Complete project overview and usage guide
• API Documentation: Detailed API reference for all modules
• Examples: Extensive examples for all features
• Configuration Guide: JSON configuration examples
• Contributing Guide: Development setup and contribution guidelines

Example Programs

• transport_example: Basic transport usage
• ipc_example: IPC communication demo
• sse_http_example: HTTP SSE communication
• mcp_filesystem_server_ipc_example: File system server
• And many more...

🔄 Integration with MCP Ecosystem

Compatibility

• Protocol Compliance: Full compliance with MCP 2024-11-05 specification
• Interoperability: Works with existing MCP servers and clients
• Standard Tools: Compatible with official MCP tools and servers
• Future-Proof: Designed to support future MCP protocol updates

Use Cases

• Desktop Applications: Native C++ applications with MCP integration
• System Services: Background services with MCP capabilities
• Development Tools: C++ development tools with MCP support
• Embedded Systems: Lightweight MCP implementation for embedded use

🚀 Getting Started

Quick Start

# Clone and build
git clone https://github.com/your-username/cpp_mcp_sdk.git
cd cpp_mcp_sdk
mkdir build && cd build
cmake ..
make -j4

# Run examples
./bin/transport_example
./bin/ipc_example

Basic Usage

// Create MCP client
mcp::MCPClient client;

// Configure and connect
mcp_transport::TransportConfig config;
config.type = mcp_transport::TransportType::IPC;
config.ipc.command = "npx";
config.ipc.args = {"-y", "@modelcontextprotocol/server-filesystem", "."};

if (client.connectWithConfig(config)) {
    // Use MCP functionality
    auto tools = client.listTools();
    auto result = client.callTool("read_file", {{"path", "/path/to/file"}});
}

📋 Checklist

Implementation

• Complete MCP protocol implementation
• Multi-transport support (IPC, HTTP, SSE)
• Client and server implementations
• File system server example
• Comprehensive error handling
• Multi-level logging system
• JSON configuration support
• Unit test suite
• Documentation and examples

Quality Assurance

• Code review completed
• Tests passing
• Documentation updated
• Examples verified
• Cross-platform testing
• Memory leak testing
• Performance testing

🙏 Acknowledgments

• Model Context Protocol for the protocol specification
• nlohmann/json for JSON handling
• httplib for HTTP functionality
• Google Test for testing framework

---

This C++ MCP SDK brings the power of the Model Context Protocol to the C++ ecosystem, enabling developers to build sophisticated AI-powered applications with ease.

[smilecoder]

现在可以使用吗

[wjd6910502]

可以，但是还没开源，在整理中