API Load Tester

Overview

This skill generates realistic load test scripts from API definitions and executes them with proper ramp-up patterns, authentication flows, and assertions. It produces clear reports identifying breaking points, bottlenecks, and latency percentiles at each traffic level.

Instructions

Step 1: Choose Tool and Gather API Info

Prefer k6 for complex scenarios (multi-step flows, thresholds, custom metrics). Use wrk for quick single-endpoint benchmarks. Use autocannon if only Node.js is available.

Gather endpoint information from:

• OpenAPI/Swagger spec files
• Route definitions (Express, FastAPI, etc.)
• User-described endpoints

Step 2: Generate Realistic Payloads