fastapi-blocking-operations

fastapi-blocking-operations is a cursor rule for Cursor from holtwood/awesome-cursorrules-zh. It costs 0 tokens per session (63 once invoked), scanned A, original, MIT.

Guidelines for avoiding blocking work in FastAPI applications. Blocking work makes the server wait instead of handling other requests.

In plain words
What is it for?
Use them when writing asynchronous routes, database access, external API calls, and route dependencies in FastAPI.
Why use it?
They help prevent slow database or external-service calls from holding up the rest of the API.

Cursor rule for Cursor

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

Good fit Use them when writing asynchronous routes, database access, external API calls, and route dependencies in FastAPI.

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

README.md
[![agentmods](https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/fastapi-blocking-operations/github.svg)](https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/fastapi-blocking-operations)
Your own site
<a href="https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/fastapi-blocking-operations"><img src="https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/fastapi-blocking-operations/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-blocking-operations

Your own site · 80×15
<a href="https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/fastapi-blocking-operations"><img src="https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/fastapi-blocking-operations.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 63 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 $0.00063
Opus 5 $0.00000 $0.00032
Sonnet 5 $0.00000 $0.00013
Haiku 4.5 $0.00000 $0.00006

Measured 6d ago against content hash 7973d1e0412e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

fastapi-blocking-operations 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-api-example/fastapi-blocking-operations.mdc · 9 lines

What it actually says

  • 倾向于异步和非阻塞流程。
  • 对数据库和外部 API 操作使用专用的异步函数。
  • 清晰地组织路由和依赖关系,以优化可读性和可维护性。
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 · 9 lines · 0 tokens per session scan A 7973d1e0412e

Subscribe to this mod's changes

fastapi-blocking-operations 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 63 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.