Verdict
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0 of 40 probes complete
This page measures what a WebView actually does with HTTP headers, cookies and storage. It talks only to its own backend, so a result here is a property of the WebView, not of any product API. Tap Run all, then open any row for the page-versus-server header diff.
Two probes need a reload to prove persistence — clear, reload, then run again.
Custom header lab
Send any headers you like, over any transport, and see exactly what arrives.
Headers
Transport
Method
Path
Resolved against this origin. Add ?acah=star or ?acah=explicit to vary how the preflight answers.
Export results
Every probe outcome, the header diffs, the environment and the console log as one JSON document — ready to attach to a report.