api-design

Design FastAPI RESTful APIs with Pydantic v2 schemas and OpenAPI docs.

Updated Aug 27, 2026
One-click install
npx skills add https://github.com/rladydqls99/fault-ratio --skill api-design-rladydqls99
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: api-design
Source: https://github.com/rladydqls99/fault-ratio/tree/main/.claude/skills/api-design
Command: npx skills add https://github.com/rladydqls99/fault-ratio --skill api-design-rladydqls99

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

API design guidance for FastAPI enables teams to build scalable, maintainable, and standards-compliant backends with consistent error handling and automatic OpenAPI documentation.

Core Features & Use Cases

  • RESTful resource naming and HTTP method semantics guidance for FastAPI endpoints.
  • Pydantic v2 schema design patterns and validation strategies.
  • Error handling schema, standardized responses, and OpenAPI integration.
  • Use Case: Design a multi-version API for a traffic analysis service with clear contracts and reusable components.

Quick Start

Create a FastAPI project following these patterns to define resources, schemas, and error handling while enabling OpenAPI documentation.

Frequently Asked Questions about api-design

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I design a RESTful API with FastAPI and Pydantic v2?▼

FastAPI API design uses Pydantic v2 schema design patterns to define validation strategies and well-structured request/response models. This mechanism enforces consistent schemas and structured error responses, ensuring maintainable and scalable backend services with clear API contracts.

What's the best way to handle error responses and versioning in FastAPI?▼

FastAPI error handling and versioning require a standardized schema for structured error responses and consistent HTTP response codes. By defining clear API versioning strategies and reusable components, teams can build scalable multi-version APIs with maintainable contracts.

Does this FastAPI API design approach support auto-generated OpenAPI specs?▼

Yes, this FastAPI API design approach fully supports auto-generated OpenAPI specs. By defining well-structured Pydantic v2 request and response models, the framework automatically generates OpenAPI documentation, providing clear API contracts for teams building scalable backend services.

How do I structure schemas for a multi-version traffic analysis API?▼

To structure schemas for a multi-version traffic analysis API, apply Pydantic v2 validation strategies and reusable components. Define well-structured request and response models with standard HTTP semantics to establish clear API contracts across different service versions.

When do I need standardized HTTP response codes in REST API design?▼

You need standardized HTTP response codes in REST API design when building scalable backend services that require consistent contracts. Enforcing standard HTTP semantics alongside a structured error handling schema ensures maintainable APIs and reliable client integrations across teams.

Can I use Pydantic v2 validation strategies for FastAPI error handling?▼

Yes, you can use Pydantic v2 validation strategies for FastAPI error handling. By defining well-structured request and response models, you enforce a standardized error handling schema that integrates seamlessly with auto-generated OpenAPI documentation for robust APIs.