bub
★ 1.7k
vs
fastapi_mcp
★ 12.0k
bub vs fastapi_mcp
bub: Bub is a small Python agent runtime built on agents.md and Agent Skills, where every stage of a turn is a pluggy hook that plugins can override. Context is rebuilt from append-only tape records, and the same pipeline serves the CLI, Telegram and custom channels.; 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
bubDev Tooling · ★ 1.7k
Running an agent in a group chat shared by several people
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
bubfastapi_mcpCategory
Dev Tooling
Dev Tooling
Stars
★ 1.7k
★ 12.0k
License
Apache-2.0
MIT
Install Command
curl -fsSL https://bub.build/install.sh | bash
uv add fastapi-mcp
Updated
2d ago
11mo ago
Open Source
Yes
Yes
Tags
agent-runtime, python, plugins
FastAPI, MCP, Python
03
Features
bub01Turn pipeline where every stage, from resolve_session to dispatch_outbound, is a replaceable hook
02Tape context rebuilt from append-only records, easy to inspect and replay
03One runtime across CLI chat, one-shot runs and a Telegram gateway
04Agent Skills discovery and plugin packaging through Python entry points
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
bub↳Running an agent in a group chat shared by several people
↳Building a custom agent by overriding only the prompt or model stage
↳Experimenting with replayable, auditable agent context
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
bubEssentialTrending
fastapi_mcpMost PopularEssential
FAQ
FAQ
What is the difference between bub and fastapi_mcp?
Both bub and fastapi_mcp are in the Dev Tooling category. bub has 1.7k stars, while fastapi_mcp has 12.0k stars.
Which is better, bub or fastapi_mcp?
The best choice depends on your use case. Choose bub if Running an agent in a group chat shared by several people, and fastapi_mcp if Integrating FastAPI services as tools for large language models (LLMs) that support MCP..
Is bub free or open source?
Yes, bub is open source on GitHub (Apache-2.0).
Is fastapi_mcp free or open source?
Yes, fastapi_mcp is open source on GitHub (MIT).
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