Api Test Suite Builder

Generates comprehensive test suites for REST APIs by analyzing your OpenAPI specs or endpoint documentation. You point it at your API definition and it creates test cases covering standard scenarios, edge cases, error handling, and validation checks. The tests are structured and ready to run with your preferred testing framework. Useful when you need test coverage quickly for a new API or want to fill gaps in existing suites. The quality depends heavily on how well documented your API is, but it's a solid time saver for getting baseline coverage in place so you can focus on writing the more nuanced business logic tests yourself.

skills.sh installs: 677
GitHub stars: 29.5K
last updated: Aug 21, 2026

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Install

$ npx -y skills add alirezarezvani/claude-skills --skill api-test-suite-builder --agent claude-code

Installs into .claude/skills of the current project.

Files

API Test Suite Builder

Tier: POWERFUL Category: Engineering Domain: Testing / API Quality

Overview

Scans API route definitions across frameworks (Next.js App Router, Express, FastAPI, Django REST) and auto-generates comprehensive test suites covering auth, input validation, error codes, pagination, file uploads, and rate limiting. Outputs ready-to-run test files for Vitest+Supertest (Node) or Pytest+httpx (Python).

Core Capabilities

Route detection — scan source files to extract all API endpoints
Auth coverage — valid/invalid/expired tokens, missing auth header
Input validation — missing fields, wrong types, boundary values, injection attempts
Error code matrix — 400/401/403/404/422/500 for each route
Pagination — first/last/empty/oversized pages
File uploads — valid, oversized, wrong MIME type, empty
Rate limiting — burst detection, per-user vs global limits