cxxmcp
★ 27
vs
fastapi_mcp
★ 12.0k
cxxmcp vs fastapi_mcp
cxxmcp: cxxmcp is a production-ready C++17 SDK for the Model Context Protocol (MCP), enabling the creation of MCP servers and clients that integrate directly into native C++ applications. It offers full protocol coverage and robust cross-SDK conformance validation, ensuring reliability and compatibility.; fastapi_mcp: FastAPI-MCP allows you to expose your existing FastAPI endpoints as Model Context Protocol (MCP) tools. It offers native integration with FastAPI, including built-in authentication using existing dependencies, and preserves schemas and documentation.
01
TL;DR
cxxmcpDev Tooling · ★ 27
Developing native C++ applications that act as MCP servers.
fastapi_mcpDev Tooling · ★ 12.0k
When to choose:
- You already have a FastAPI application and want to expose its endpoints as MCP tools while reusing your existing FastAPI authentication dependencies and Swagger schemas.
- You want to mount the MCP server directly onto your ASGI app or deploy it separately under an MIT license.
When to skip:
- You are building a standalone MCP server from scratch rather than wrapping a FastAPI app; use FastMCP or the official MCP Python SDK.
- You need an actively updated repository (last push was November 2025).
02
Side-by-Side Comparison
Field
cxxmcpfastapi_mcpCategory
Dev Tooling
Dev Tooling
Stars
★ 27
★ 12.0k
License
MIT
MIT
Install Command
cmake -S . -B build -DCXXMCP_BUILD_CLIENT=ON -DCXXMCP_BUILD_SERVER=ON && cmake --build build --config Release && cmake --install build --config Release --prefix out/install/cxxmcp
uv add fastapi-mcp
Updated
6d ago
11mo ago
Open Source
Yes
Yes
Tags
C++17, SDK, Model Context Protocol
FastAPI, MCP, Python
03
Features
cxxmcp01Full MCP protocol coverage with typed, capability-gated helpers.
02Cross-SDK conformance validation against the official runner.
03Multiple transport options including stdio, process-stdio, Streamable HTTP, and WebSocket.
04RMCP-style Peer/Service architecture designed for embedding.
05Standard CMake SDK consumption.
fastapi_mcp01Authentication built in, using your existing FastAPI dependencies!
02FastAPI-native: Not just another OpenAPI -> MCP converter
03Zero/Minimal configuration required
04Preserving schemas of your request models and response models
05Flexible deployment - Mount your MCP server to the same app, or deploy separately
04
Use Cases
cxxmcp↳Developing native C++ applications that act as MCP servers.
↳Building C++ clients to interact with MCP-compliant services.
↳Integrating Model Context Protocol capabilities directly into existing C++ projects.
fastapi_mcp↳Integrating FastAPI services as tools for large language models (LLMs) that support MCP.
↳Enabling LLMs to interact with and utilize existing business logic and data exposed via FastAPI.
↳Quickly exposing authenticated FastAPI APIs as discoverable and usable tools within an MCP ecosystem.
05
Best For
cxxmcp—
fastapi_mcpMost PopularEssential
FAQ
FAQ
What is the difference between cxxmcp and fastapi_mcp?
Both cxxmcp and fastapi_mcp are in the Dev Tooling category. cxxmcp has 27 stars, while fastapi_mcp has 12.0k stars.
Which is better, cxxmcp or fastapi_mcp?
The best choice depends on your use case. Choose cxxmcp if Developing native C++ applications that act as MCP servers., and fastapi_mcp if Integrating FastAPI services as tools for large language models (LLMs) that support MCP..
Is cxxmcp free or open source?
Yes, cxxmcp is open source on GitHub (MIT).
Is fastapi_mcp free or open source?
Yes, fastapi_mcp is open source on GitHub (MIT).
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