fastapi-best-practices

fastapi-best-practices is a cursor rule for Cursor from holtwood/awesome-cursorrules-zh. It costs 0 tokens per session (119 once invoked), scanned A, original, MIT.

FastAPI development rules covering Pydantic validation models, dependency injection for shared resources, asynchronous operations, HTTP errors, API routes, and built-in OpenAPI documentation.

In plain words
What is it for?
Use it as a general guide when building FastAPI web APIs.
Why use it?
It provides consistent ways to validate data, share resources, handle errors, and describe an API.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit Use it as a general guide when building FastAPI web APIs.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/holtwood/awesome-cursorrules-zh/fastapi-best-practices
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/holtwood/awesome-cursorrules-zh

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for fastapi-best-practices

README.md
[![agentmods](https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/fastapi-best-practices/github.svg)](https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/fastapi-best-practices)
Your own site
<a href="https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/fastapi-best-practices"><img src="https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/fastapi-best-practices/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for fastapi-best-practices

Your own site · 80×15
<a href="https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/fastapi-best-practices"><img src="https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/fastapi-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 119 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00119
Opus 5 $0.00000 $0.00060
Sonnet 5 $0.00000 $0.00024
Haiku 4.5 $0.00000 $0.00012

Measured 6d ago against content hash 07608da33d30, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

fastapi-best-practices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs/rules/backend/python/fastapi/fastapi-best-practices.mdc · 11 lines

What it actually says

  • 使用 Pydantic 模型进行请求和响应模式
  • 为共享资源实现依赖注入
  • 对非阻塞操作使用 async/await
  • 使用路径操作装饰器(@app.get、@app.post 等)
  • 使用 HTTPException 实现适当的错误处理
  • 使用 FastAPI 内置的 OpenAPI 和 JSON Schema 支持
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 11 lines · 0 tokens per session scan A 07608da33d30

Subscribe to this mod's changes

fastapi-best-practices is a cursor rule published in the GitHub repository holtwood/awesome-cursorrules-zh (233 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 119 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.