FastAPI
High-performance Python web framework with automatic API docs and async support.
Used in agent projects
537
4.2% of 12,697 public repos built with AI coding agents
Rank in http servers and apis
#3 of 30
by use in those projects
Downloads
107M
PyPI, last 7 days, fastapi
GitHub stars
103K
last push Oct 8, 2026
How FastAPI is used
FastAPI is a dependency in 537 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (4.2%), #3 of 30 in http servers and apis. The most used alternative there is Express. Projects that use it most often also use Uvicorn (93.5%), Pydantic (65.9%), python-dotenv (56.2%). It is more common in projects set up for Roo Code (8.8%) than for OpenAI Codex (3.8%).
Often used with FastAPI
| Uvicorn | 93.5% of FastAPI projects · 21.8× more than average |
|---|---|
| Pydantic | 65.9% of FastAPI projects · 12.9× more than average |
| python-dotenv | 56.2% of FastAPI projects · 8.6× more than average |
| python-multipart | 36.7% of FastAPI projects · 21.5× more than average |
| Requests | 35.6% of FastAPI projects · 6.7× more than average |
| NumPy | 34.6% of FastAPI projects · 9.0× more than average |
| Pydantic Settings | 32.6% of FastAPI projects · 16.5× more than average |
| SQLAlchemy | 31.8% of FastAPI projects · 16.2× more than average |
By coding agent
| GitHub Copilot | 8.1% of projects set up for it |
|---|---|
| Claude Code | 6.0% of projects set up for it |
| Cursor | 6.9% of projects set up for it |
| Gemini CLI | 5.3% of projects set up for it |
| Devin Desktop | 6.2% of projects set up for it |
| OpenAI Codex | 3.8% of projects set up for it |
| OpenCode | 4.7% of projects set up for it |
| Roo Code | 8.8% of projects set up for it |
Share of public repos configured for each agent that list FastAPI as a dependency.
Install
| Package | pip install fastapi |
|---|---|
| Packages counted | fastapi, fastapi-mcp, fastapi-cli, fastapi-cloud-cli, fastapi-mail, fastapi-cache2, fastapi-users, fastapi-featureflags |
| Main stacks | Python (523), Next.js (11), Other (2), .NET (1) |
| Example projects | dramaclaw/dramaclaw, The-Swarm-Corporation/AutoHedge, Josh-XT/AGiXT, learntocloud/learn-to-cloud-app, daydreamlive/DEMON |
Alternatives to FastAPI
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| Express npm Fast, unopinionated minimalist web framework for Node.js. |
822 (6.5%) | 142M | 69.6K | MIT |
| Uvicorn pypi Lightning-fast ASGI server for running async Python web applications. |
544 (4.3%) | 13M | 11K | — |
| cors npm Express/Node.js middleware for handling Cross-Origin Resource Sharing. |
422 (3.3%) | 86.8M | 6,195 | MIT |
| python-multipart pypi Streaming multipart parser for handling file uploads in Python web frameworks. |
217 (1.7%) | 92.8M | 536 | — |
| Flask pypi Lightweight Python web framework for building web applications and APIs. |
174 (1.4%) | 40.9M | 75K | — |
| Hono npm Ultrafast web framework for edge runtimes built on Web Standards. |
136 (1.1%) | 73.9M | 32.5K | MIT |
| express-rate-limit npm Express middleware for rate limiting API requests by IP address. |
105 (0.8%) | 57.6M | 3,311 | MIT |
| GraphQL.js npm JavaScript implementation of GraphQL query language and runtime. |
105 (0.8%) | 50.6M | 20.3K | MIT |