cpp-mcp-sdk

[](https://github.com/itcv-GmbH/cpp-mcp-sdk/actions/workflows/ci.yml) [](https://opensource.org/licenses/MIT) [](https://isocpp.org/) [](https://modelcontextprotocol.io/)

The first fully MCP 2025-11-25 compliant C++ SDK - Build production-ready MCP servers and clients with complete protocol support including Streamable HTTP transport and OAuth-based authorization.

• Transports: stdio + Streamable HTTP (single endpoint, resumable SSE)
• Server Features: Tools, Resources, Prompts with full CRUD operations
• Client Features: Roots, Sampling, Elicitation (form + URL modes)
• Utilities: Ping, Cancellation, Progress, Tasks, Pagination, Logging, Completion
• Authorization: OAuth 2.1 + PKCE, RFC9728 discovery, WWW-Authenticate challenges
• Security: Origin validation, SSRF protection, runtime limits, token storage abstraction

• Linux (Ubuntu 24.04+)
• macOS (14+)
• Windows (Server 2022+)

• Comprehensive test suite (18K+ lines, conformance + integration tests)
• CI/CD with pinned dependencies for reproducible builds
• Extensive documentation and security guidelines
• Zero raw pointers - RAII throughout

• CMake 3.16+
• C++17 compiler (GCC 7+, Clang 5+, MSVC 2017+)
• vcpkg (for dependency management)
• Python 3.12+ (for codebase checks)

# Clone the repository
git clone https://github.com/itcv-GmbH/cpp-mcp-sdk.git
cd cpp-mcp-sdk

# Configure (macOS/Linux)
cmake --preset vcpkg-unix-release

# Configure (Windows)
cmake --preset vcpkg-windows-release

# Build
cmake --build build/vcpkg-unix-re