ILSpy-Mcp
★ 75
vs
fastapi_mcp
★ 12.0k
ILSpy-Mcp vs fastapi_mcp
ILSpy-Mcp: ILSpy MCP Server is a .NET 9-based Model Context Protocol (MCP) server that provides AI assistants with in-memory .NET assembly decompilation and structural analysis capabilities. It acts as a bridge, enabling LLMs to inspect, decompile, and analyze compiled .NET code directly via natural language.; 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
ILSpy-McpDev Tooling · ★ 75
Analyze the high-level architecture of unfamiliar .NET libraries or assemblies.
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
03
Features
ILSpy-Mcp01In-memory .NET assembly decompilation and structural analysis
02Communication with AI clients via JSON-RPC 2.0 over standard input/output (stdio)
03Configurable operation timeouts and output size limits to protect LLM context windows
04Comprehensive toolset for assembly discovery, type inspection, and targeted decompilation
05Read-only disassembly and reflection operations with robust path validation
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
ILSpy-Mcp↳Analyze the high-level architecture of unfamiliar .NET libraries or assemblies.
↳Explore types, namespaces, and API surfaces within compiled .NET code.
↳Decompile specific classes, interfaces, structs, enums, or methods to understand their implementation logic.
↳Identify inheritance hierarchies and extension methods within .NET assemblies.
↳Search for members matching a substring or pattern across the assembly.
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
ILSpy-Mcp—
fastapi_mcpMost PopularEssential
FAQ
FAQ
What is the difference between ILSpy-Mcp and fastapi_mcp?
Both ILSpy-Mcp and fastapi_mcp are in the Dev Tooling category. ILSpy-Mcp has 75 stars, while fastapi_mcp has 12.0k stars.
Which is better, ILSpy-Mcp or fastapi_mcp?
The best choice depends on your use case. Choose ILSpy-Mcp if Analyze the high-level architecture of unfamiliar .NET libraries or assemblies., and fastapi_mcp if Integrating FastAPI services as tools for large language models (LLMs) that support MCP..
Is ILSpy-Mcp free or open source?
Yes, ILSpy-Mcp 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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