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.
npx agentmods add rules/toptalentcoder/cursor-awesomerules/fastapi-middlewaregit clone --depth 1 https://github.com/toptalentcoder/Cursor-AwesomeRulesWrote 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.
[](https://agentmods.dev/rules/toptalentcoder/cursor-awesomerules/fastapi-middleware)<a href="https://agentmods.dev/rules/toptalentcoder/cursor-awesomerules/fastapi-middleware"><img src="https://agentmods.dev/badge/rules/toptalentcoder/cursor-awesomerules/fastapi-middleware.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00091 | $0.00091 |
| Opus 5 | $0.00046 | $0.00046 |
| Sonnet 5 | $0.00018 | $0.00018 |
| Haiku 4.5 | $0.00009 | $0.00009 |
Grade A, and why
fastapi-middleware 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 2d 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.
This is a copy
100% identical to fastapi-middleware — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
- Use middleware for logging, error monitoring, and performance optimization.
- Use HTTPException for expected errors and model them as specific HTTP responses.
- Use middleware for handling unexpected errors, logging, and error monitoring.
- Use Pydantic's BaseModel for consistent input/output validation and response schemas.
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.
- 2d ago First seen · 8 lines · 91 tokens per session scan A a45c841e789b
fastapi-middleware is a cursor rule published in the GitHub repository toptalentcoder/Cursor-AwesomeRules (6 stars, last pushed 1y ago), licensed CC0-1.0. It adds 91 tokens to every session, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to fastapi-middleware, differing in 0 lines, and is treated as a copy.
Other cursor rules, from other repositories
error-handling-pattern-3-custom-error-strategies
Cursor rule "error-handling-pattern-3-custom-error-strategies" from PaulJPhilp/EffectPatterns, covering error handling pattern 3: custom error strategies and example.
mcp-debugging
The mcp-debug agent provides essential tools to test and explore MCP (Model Context Protocol) servers. This guide focuses on using the agent to debug MCP server behavior and functionality.
seam-audit
排查「接缝」bug（前后端/事件 producer↔consumer/字段·路由·DB 列管线是否真接通）时读——两类接缝签名 + 防误报铁律 + 可复用并行探子配方。做接缝/漂移/gap 排查前读。.
error-handling
Error handling patterns for backend services. Apply when handling errors in handlers or services.
fastapi-middleware
Cursor AI 编程规则精选集 | 132+ 规则，覆盖前端/后端/AI/DevOps 等 32 个领域.
Error Handling and Logging
All application errors go through the centralized hierarchy in back/core/errors/. A global exception handler in shared/fastapi/main.createapp() translates them into a uniform ErrorResponse JSON body.