API ecosystem / Tutorial
API Testing Guide for Browser-Based Workflows
How to test REST APIs in the browser, inspect JSON responses, handle headers and understand CORS proxy tradeoffs.
Start with a reproducible request
Record the method, URL, headers, query parameters and body. A clean request is easier to debug than a copied browser error.
Inspect the response shape
Format JSON, check status codes, compare headers and copy representative examples into tests or docs. For array responses, table views can reveal missing fields quickly.
Understand CORS
Browsers enforce CORS. A proxy can help with public testing, but sensitive credentials should stay in local or trusted environments. CORS must ultimately be fixed on the target server.