fastapi-pro

A Python API development assistant for FastAPI, a framework for building web APIs, with support for asynchronous code. It also covers database access with SQLAlchemy, data validation with Pydantic, microservices, and WebSockets.

In plain words
What is it for?
Use it to build FastAPI services, design asynchronous endpoints, connect databases, create microservices, add WebSocket communication, and improve async API performance.
Why use it?
It helps structure APIs that handle many waiting operations efficiently and keeps related data, service, and communication patterns organized.

Agent

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.

agentmods
npx agentmods add agents/dicklesworthstone/pi_agent_rust/fastapi-pro
Clone the repo
git clone --depth 1 https://github.com/Dicklesworthstone/pi_agent_rust
Per session 57 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,235 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00057 $0.01235
Opus 5 $0.00028 $0.00617
Sonnet 5 $0.00011 $0.00247
Haiku 4.5 $0.00006 $0.00123

Measured 2d ago against content hash 91a5c9508809, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fastapi-pro 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.

tests/ext_conformance/artifacts/agents-wshobson/api-scaffolding/agents/fastapi-pro.md · 172 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 2d ago First seen · 172 lines · 57 tokens per session scan A 91a5c9508809

Subscribe to this mod's changes

fastapi-pro is an agent published in the GitHub repository Dicklesworthstone/pi_agent_rust (1,689 stars, last pushed today), with no licence file. It adds 57 tokens to every session and 1,235 once invoked, about $0.0003 per session on Opus 5. 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 2026-08-30.