MCP C++
A C++ SDK for the Model Context Protocol (MCP). The SDK will provide a framework for creating MCP servers and clients in C++.
What is MCP C++?
MCP C++ is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to c++ sdk for the model context protocol (mcp). the sdk will provide a framework for creating mcp servers and clients in c++.
A C++ SDK for the Model Context Protocol (MCP). The SDK will provide a framework for creating MCP servers and clients in C++.
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- A C++ SDK for the Model Context Protocol (MCP). The SDK will
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx mcp-cppConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use MCP C++
MCP C++ (mcp-cpp) is a native C++ SDK for the Model Context Protocol that provides a complete framework for building high-performance MCP servers and clients in C++. It implements MCP protocol revision 2025-11-25 in full, covering tools, resources, prompts, sampling, tasks, elicitation, OAuth 2.1, stdio and Streamable HTTP transports, and server-initiated LLM sampling. Systems programmers, game developers, embedded engineers, and anyone building performance-critical AI integrations use mcp-cpp to create MCP components without the overhead of a Node.js or Python runtime — integrating AI tooling directly into existing C++ codebases via CMake.
Prerequisites
- C++17-compatible compiler (GCC 9+, Clang 10+, or MSVC 2019+)
- CMake 3.20 or later and Ninja build system
- Git for cloning dependencies (used by FetchContent if MCP_USE_SYSTEM_DEPS=OFF)
- An MCP-compatible client such as Claude Desktop to test compiled servers
- Optional: GTest for running the built-in test suite (enabled with MCP_BUILD_TESTS=ON)
Clone the mcp-cpp repository
Clone the Neumann-Labs mcp-cpp repository. Dependencies are fetched automatically by CMake's FetchContent mechanism unless you opt into system packages.
git clone https://github.com/Neumann-Labs/mcp-cpp
cd mcp-cppConfigure and build with CMake
Configure the build with Ninja for fast compilation. The default build includes tests and examples, which serve as reference implementations for your own servers.
cmake -B build -G Ninja
cmake --build buildRun the test suite to verify the build
Execute the bundled GTest suite to confirm the SDK built correctly on your platform.
ctest --test-dir build --output-on-failureIntegrate mcp-cpp into your own CMake project
To use the SDK in your project, either install it and use find_package, or add it directly with FetchContent. Link your target against mcp::mcp to get all headers and transport implementations.
# In your CMakeLists.txt:
find_package(mcp REQUIRED)
target_link_libraries(my_mcp_server PRIVATE mcp::mcp)Build a minimal stdio MCP server
Follow the examples in the build/examples directory to write a minimal server: register tools with JSON schema handlers, then run with StdioTransport. Compile and point Claude Desktop at the resulting binary.
{
"mcpServers": {
"my-cpp-server": {
"command": "/absolute/path/to/my_mcp_server"
}
}
}MCP C++ Examples
Client configuration
Claude Desktop configuration for a custom MCP server built with the mcp-cpp SDK, running as a native binary via stdio transport.
{
"mcpServers": {
"my-cpp-server": {
"command": "/Users/you/projects/my-mcp-server/build/my_mcp_server"
}
}
}Prompts to try
Example prompts you can use once your mcp-cpp server is running and connected to Claude Desktop.
- "List all the tools available from my C++ MCP server."
- "Call the calculate_sum tool with inputs 42 and 58."
- "Read the resource file://data/config.json exposed by my server."
- "Request a sampled LLM response from the server's sampling handler."
- "Check the health of my C++ MCP server and report any issues."Troubleshooting MCP C++
CMake configure fails with 'Could not find package mcp'
If using find_package after a local build, run cmake --install build --prefix /usr/local first to install the headers and CMake package files to a system-visible location. Alternatively, use FetchContent to pull mcp-cpp directly into your project without a separate install step.
Linker errors referencing mcp::mcp symbols
Ensure you link with target_link_libraries(my_target PRIVATE mcp::mcp) and not just add the include directories. The SDK is a compiled static library, not header-only, so the linker step is required.
Server binary crashes on first tool call from Claude Desktop
Enable address sanitizer to find memory bugs quickly: reconfigure with cmake -B build -DMCP_ENABLE_ASAN=ON -G Ninja and rebuild. Run the binary directly in a terminal first so you see the sanitizer output before connecting it to Claude Desktop.
Frequently Asked Questions about MCP C++
What is MCP C++?
MCP C++ is a Model Context Protocol (MCP) server that c++ sdk for the model context protocol (mcp). the sdk will provide a framework for creating mcp servers and clients in c++. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install MCP C++?
Follow the installation instructions on the MCP C++ GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with MCP C++?
MCP C++ works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is MCP C++ free to use?
Yes, MCP C++ is open source and available under the GPL-3.0 license. You can use it freely in both personal and commercial projects.
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