fastapi-microservices-serverless

fastapi-microservices-serverless is a skill for Claude Code, Codex from Mindrally/skills. It costs 21 tokens per session (291 once invoked), scanned A, original, Apache-2.0.

A guide to building FastAPI microservices for serverless and cloud-based systems. FastAPI is a Python framework for creating web APIs, while a microservice is a small service designed to run independently.

In plain words
What is it for?
Use it to design API endpoints, Redis-backed caching, gateway routing, OAuth2 authentication, asynchronous operations, serverless deployment, monitoring, timeouts, and horizontal scaling.
Why use it?
It helps address common service problems such as shared state, unreliable retries, slow startup, weak input validation, missing health checks, and poor scaling behavior.

Skill for Claude CodeCodex

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 skills/mindrally/skills/fastapi-microservices-serverless
Any agent
npx skills add Mindrally/skills --skill fastapi-microservices-serverless
Clone the repo
git clone --depth 1 https://github.com/Mindrally/skills

Made for: Claude Code, Codex.

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-microservices-serverless

README.md
[![agentmods](https://agentmods.dev/badge/skills/mindrally/skills/fastapi-microservices-serverless.svg)](https://agentmods.dev/skills/mindrally/skills/fastapi-microservices-serverless)
Your own site
<a href="https://agentmods.dev/skills/mindrally/skills/fastapi-microservices-serverless"><img src="https://agentmods.dev/badge/skills/mindrally/skills/fastapi-microservices-serverless.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 291 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00021 $0.00291
Opus 5 $0.00010 $0.00146
Sonnet 5 $0.00004 $0.00058
Haiku 4.5 $0.00002 $0.00029

Measured 4d ago against content hash c0cc121c237a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fastapi-microservices-serverless 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 4d 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.

fastapi-microservices-serverless/SKILL.md · 59 lines

What it actually says

FastAPI Microservices Serverless

You are an expert in building FastAPI microservices for serverless and cloud-native environments.

Core Principles

  • Design stateless services with Redis caching
  • Implement API Gateway integration (Kong, AWS API Gateway)
  • Follow serverless and cloud-native patterns
  • Use security middleware (OAuth2, OpenTelemetry)
  • Optimize performance with async capabilities

Stateless Design

  • Store session data in Redis or external stores
  • Design idempotent endpoints
  • Use environment variables for configuration
  • Implement proper health checks

API Gateway Integration

  • Configure routing and rate limiting
  • Implement authentication at gateway level
  • Use proper API versioning
  • Handle CORS appropriately

Serverless Patterns

  • Optimize cold start times
  • Use connection pooling carefully
  • Implement proper timeout handling
  • Design for horizontal scaling

Security

  • Implement OAuth2 authentication
  • Use OpenTelemetry for observability
  • Validate all inputs with Pydantic
  • Implement proper error handling

Performance

  • Use async/await for I/O operations
  • Implement caching strategies
  • Optimize database queries
  • Monitor with Prometheus/Grafana

Monitoring

  • Implement distributed tracing
  • Use structured logging
  • Set up proper alerting
  • Monitor key metrics
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. 4d ago First seen · 59 lines · 21 tokens per session scan A c0cc121c237a

Subscribe to this mod's changes

fastapi-microservices-serverless is a skill published in the GitHub repository Mindrally/skills (253 stars, last pushed today), licensed Apache-2.0. It adds 21 tokens to every session and 291 once invoked, about $0.0001 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.

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