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Python and FastAPI backend best practices v1.0.0

Use this resource to build a typed FastAPI API in Python with Pydantic models

New

  • 272 downloads
  • 96 likes
  • 199 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install python-fastapi-backend-rule

First time: connect the CLI with

npx --yes palatekit@latest login

Cursor organizes routers by domain, annotates every function, prefers Pydantic models over raw dictionaries, and handles errors at the start of functions. It uses def for pure functions and async def for asynchronous operations.

Mostly picked by

Updated November 2, 2026

Card for “Python and FastAPI backend best practices”

Details

Works in
Install guides
Generates with
Your agent's model
Licence
CC0-1.0

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What you get

  • The .mdc file (in English): FastAPI, Pydantic and error-handling conventions
  • A file layout of routers, sub-routes, utilities and types

Good fit for

  • A growing FastAPI API in Python
  • A team that wants validated data schemas

Not for

    Tags

    • python
    • fastapi
    • pydantic
    • api

    About

    You say

    “Add the account creation route with its Pydantic model.”

    Card for “Python and FastAPI backend best practices”

    Rule published by PatrickJS under the CC0-1.0 license, delivered in its original version.

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    How to use it

    1. Copy the .mdc file into your project's .cursor/rules/ folder
    2. Ask Cursor to build a typed FastAPI API in Python with Pydantic models
    3. Adjust the rule to your conventions

    Content preview

    Files

    • LICENSE6.5 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • python-fastapi-backend-rule.mdc3.7 KB

    Origin and licence

    Listed unmodified

    Author
    PatrickJS
    Source
    github.com/PatrickJS/awesome-cursorrules/blob/b044f956f021b6e8877f16781bcfc466a6a120e9/rules/py-fast-api.mdc
    Licence
    CC0-1.0

    Notice

    « py-fast-api » (PatrickJS, CC0-1.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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