AgentIndex icon
AgentIndex
csharp-sdk logo
csharp-sdk
★ 4.6k
vs
fastapi_mcp logo
fastapi_mcp
★ 12.0k

csharp-sdk vs fastapi_mcp

csharp-sdk: The MCP C# SDK is the official C# SDK for the Model Context Protocol, designed to enable .NET applications, services, and libraries to implement and interact with MCP clients and servers. The Model Context Protocol (MCP) itself is an open protocol that standardizes how applications provide context to Large Language Models (LLMs), facilitating secure integration between LLMs and various data sources and tools.; 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

csharp-sdk logo
csharp-sdkDev Tooling · ★ 4.6k

Integrating .NET applications with the Model Context Protocol

Read csharp-sdk full review →
fastapi_mcp logo
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).
Read fastapi_mcp full review →
02

Side-by-Side Comparison

Field
csharp-sdk logocsharp-sdk
fastapi_mcp logofastapi_mcp
Category
Dev Tooling
Dev Tooling
Stars
★ 4.6k
★ 12.0k
License
NOASSERTION
MIT
Install Command
dotnet add package ModelContextProtocol
uv add fastapi-mcp
Updated
1d ago
11mo ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
csharp, dotnet, mcp
FastAPI, MCP, Python
03

Features

csharp-sdk logocsharp-sdk
01Implement and interact with MCP clients and servers
02Low-level client and server APIs (via ModelContextProtocol.Core)
03Hosting and dependency injection extensions (via ModelContextProtocol)
04Support for HTTP-based MCP servers (via ModelContextProtocol.AspNetCore)
fastapi_mcp logofastapi_mcp
01Authentication 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

csharp-sdk logocsharp-sdk
↳Integrating .NET applications with the Model Context Protocol
↳Building MCP clients to provide context to LLMs
↳Developing MCP servers to expose data sources and tools to LLMs
fastapi_mcp logofastapi_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

csharp-sdk logocsharp-sdk
Essential
fastapi_mcp logofastapi_mcp
Most PopularEssential
FAQ

FAQ

What is the difference between csharp-sdk and fastapi_mcp?
Both csharp-sdk and fastapi_mcp are in the Dev Tooling category. csharp-sdk has 4.6k stars, while fastapi_mcp has 12.0k stars.
Which is better, csharp-sdk or fastapi_mcp?
The best choice depends on your use case. Choose csharp-sdk if Integrating .NET applications with the Model Context Protocol, and fastapi_mcp if Integrating FastAPI services as tools for large language models (LLMs) that support MCP..
Is csharp-sdk free or open source?
Yes, csharp-sdk is open source on GitHub (NOASSERTION).
Is fastapi_mcp free or open source?
Yes, fastapi_mcp is open source on GitHub (MIT).
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Related

Alternatives to csharp-sdk →Alternatives to fastapi_mcp →csharp-sdk details →fastapi_mcp details →