mypy
Optional static type checker for Python enabling better code quality and IDE support.
Used in agent projects
60
0.5% of 12,697 public repos built with AI coding agents
Rank in languages, types and runtimes
#10 of 18
by use in those projects
Downloads
43.3M
PyPI, last 7 days, mypy
GitHub stars
20.7K
last push Oct 9, 2026
How mypy is used
mypy is a dependency in 60 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (0.5%), #10 of 18 in languages, types and runtimes. The most used alternative there is TypeScript. Projects that use it most often also use pytest (100.0%), Black (80.0%), Pydantic (73.3%).
Often used with mypy
| pytest | 100.0% of mypy projects · 38.5× more than average |
|---|---|
| Black | 80.0% of mypy projects · 94.1× more than average |
| Pydantic | 73.3% of mypy projects · 14.3× more than average |
| python-dotenv | 70.0% of mypy projects · 10.7× more than average |
| Uvicorn | 66.7% of mypy projects · 15.6× more than average |
| FastAPI | 58.3% of mypy projects · 13.8× more than average |
| NumPy | 55.0% of mypy projects · 14.3× more than average |
| Requests | 55.0% of mypy projects · 10.3× more than average |
By coding agent
| GitHub Copilot | 0.9% of projects set up for it |
|---|---|
| Claude Code | 0.7% of projects set up for it |
| Cursor | 0.6% of projects set up for it |
| Devin Desktop | 1.8% of projects set up for it |
Share of public repos configured for each agent that list mypy as a dependency.
Install
| Package | pip install mypy |
|---|---|
| Main stacks | Python (56), Other (2), Next.js (2) |
| Example projects | kr8tiv-ai/Jarvis, mikegianfelice/Hunter, neurobloomai/pact-ax, MarcusJellinghaus/mcp-tools-py, mdlmarkham/TailOpsMCP |
Alternatives to mypy
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| TypeScript npm Language for application-scale JavaScript development with static type checking. |
7,092 (55.9%) | 305M | 111K | Apache-2.0 |
| tsx npm Node.js enhanced with esbuild to run TypeScript and ESM files. |
1,262 (9.9%) | 96.8M | 12.2K | MIT |
| ts-node npm TypeScript execution environment for Node.js with source map support. |
865 (6.8%) | 45.6M | 13.1K | MIT |
| vue-tsc npm TypeScript type checker for Vue.js single-file components. |
111 (0.9%) | 6.5M | 6,724 | MIT |
| tsconfig-paths npm Module resolution utility that loads Node.js modules according to TypeScript path mappings. |
86 (0.7%) | 113M | 1,908 | MIT |
| Cloudflare Workers Types npm TypeScript type definitions for Cloudflare Workers runtime. |
84 (0.7%) | 12.1M | 8,888 | MIT OR Apache-2.0 |
| jiti npm Runtime TypeScript and ESM support for Node.js without build steps. |
84 (0.7%) | 19M | 2,973 | MIT |
| CFFI pypi Foreign Function Interface for calling C code from Python. |
84 (0.7%) | 248M | 280 | — |