Fastapi
CheckedFastAPI enables rapid API development with a modern Python framework, streamlining backend creation and deployment.
Install on your platform
Showing Claude Code. One command installs this skill into any of the agents below.
- 1
Run this in your project
terminal$ npx skills add fastapi/fastapi --skill fastapi -a claude-code Uses the open-source
skillsCLI and needs Node.js. Add-gto install it for your user instead of this project.
What we know about this skill
Publisher
fastapi
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Install target
Live repository
Not pinned. Installing fetches whatever the repository holds at the time you run the command.
Automated safety checks
This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.
Declares what it does: passed
SKILL.md parses and declares a name and a description.
SKILL.md exists, its frontmatter parses, and it declares a name and a description.
No undeclared network calls: passed
Makes no network calls.
Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.
No obfuscated payloads: passed
No encoded or obfuscated payloads.
No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.
No credential access: passed
Reads no keys, tokens, keychains or credential files.
Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.
No pipe-to-shell installers: passed
No pipe-to-shell or download-and-run installers.
No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.
Pinned to a commit: passed
Scanned fastapi/fastapi at 192b12197e.
The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.
- Commit
- 192b12197e
- Scanned
- 7 files, 838 lines
About this skill
What it does
FastAPI is a modern, high-performance web framework for building APIs with Python. It leverages standard Python type hints to automatically generate interactive API documentation and perform data validation.
When to use it
- Building production-ready RESTful or GraphQL services that require high performance.
- Creating AI agent backends where automatic schema generation speeds up development cycles.
- Deploying microservices that need robust dependency injection and async support.
- Prototyping APIs quickly while maintaining type safety and clean code structure.
Key capabilities
- Automatic interactive API documentation via Swagger UI and ReDoc.
- Built-in data validation using Python type hints (Pydantic models).
- High performance comparable to Node.js and Go for async operations.
- Native support for dependency injection to manage application state cleanly.
- Easy integration with standard testing tools like pytest.
Example prompts
- "Create a FastAPI endpoint that accepts a user object, validates the email field, and returns a 201 status code."
- "Generate the Pydantic schema for an AI agent response payload containing text and metadata fields."
- "Set up a FastAPI server with Swagger UI enabled to document my new backend service."
Tips & gotchas
Ensure you have Python 3.10+ installed, as older versions lack critical type hint features required by Pydantic v2. While FastAPI is highly performant, complex validation logic in large applications may still require manual optimization for extreme latency requirements.