barbacane
★ 29
vs
fastapi_mcp
★ 12.0k
barbacane vs fastapi_mcp
barbacane: Barbacane is a spec-driven API gateway built in Rust. It uses OpenAPI/AsyncAPI specs as configuration, compiles them into sealed artifacts, and provides routing, validation, authentication, AI traffic management, and MCP support. It features fast performance, security by default, and an extensible plugin system.; 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
barbacaneDev Tooling · ★ 29
API gateway for microservices with spec-driven routing and validation
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
barbacanefastapi_mcpCategory
Dev Tooling
Dev Tooling
Stars
★ 29
★ 12.0k
License
AGPL-3.0
MIT
Install Command
git clone https://github.com/barbacane-dev/barbacane.git && cd barbacane && cargo build --release
uv add fastapi-mcp
Updated
1w ago
11mo ago
Open Source
Yes
Yes
Tags
ai, ai-gateway, ai-gateways
FastAPI, MCP, Python
03
Features
barbacane01Spec as config — your OpenAPI/AsyncAPI spec is the single source of truth
02Fast and predictable — Rust, Tokio, and Hyper, with route lookup in ~83 ns
03Secure by default — memory-safe runtime, TLS via Rustls, sandboxed WASM plugins
04AI gateway built-in — unified LLM routing with provider fallback and dedicated middlewares
05MCP from your spec — every operation is automatically exposed as a Model Context Protocol tool
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
barbacane↳API gateway for microservices with spec-driven routing and validation
↳AI proxy to unify multiple LLM providers with fallback and policy enforcement
↳Expose existing OpenAPI specs as MCP tools for AI agents
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
barbacane—
fastapi_mcpMost PopularEssential
FAQ
FAQ
What is the difference between barbacane and fastapi_mcp?
Both barbacane and fastapi_mcp are in the Dev Tooling category. barbacane has 29 stars, while fastapi_mcp has 12.0k stars.
Which is better, barbacane or fastapi_mcp?
The best choice depends on your use case. Choose barbacane if API gateway for microservices with spec-driven routing and validation, and fastapi_mcp if Integrating FastAPI services as tools for large language models (LLMs) that support MCP..
Is barbacane free or open source?
Yes, barbacane is open source on GitHub (AGPL-3.0).
Is fastapi_mcp free or open source?
Yes, fastapi_mcp is open source on GitHub (MIT).
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