API Test Lab Documentation & Guides
API Test Lab is a browser-based workflow for REST API testing, no-code load testing, and lightweight traffic monitoring. Start with the guides below no installation required.
Core User Guides
How it works
Create your first API test in under two minutes signup, send a request, read the response.
FAQ
Pricing, plans, load testing limits, auth, and common troubleshooting answers.
Blog & tutorials
REST API testing, load testing guides, Postman alternatives, and performance tips.
Features overview
API tester, load tester, traffic monitoring, web analysis, and AI response explain.
Developer & Agent Resources
OpenAPI 3.0 Specification
Machine-readable OpenAPI 3.0 schema covering all platform routes, parameters, and response types.
Agent & LLM Context
llms.txt standard guidance describing when and how AI agents should interact with API Test Lab.
Self-Serve API Keys
Generate immediate X-API-Key tokens in Account Settings for CI/CD pipelines and automated runners.
API Deprecation Policy
Formal policy on URL versioning, 90-day sunset notices, RFC 8594 headers, and 410 Gone transitions.
Backend API Reference & Swagger
Live interactive Swagger UI is available on our API origin, and the raw schema is downloadable anytime via OpenAPI JSON.
Home · Questions? Email hi@apitestlab.org or visit the contact page.