Type this exact prompt into LLMinONE and watch it become a live, interactive developer tools app:
Build an API testing workbench: enter a URL, method, headers and JSON body, send the request, and see status, timing, size and a formatted JSON response with collapsible nodes. Keep a request history with re-run and duplicate, save named collections, add environment variables like {{baseUrl}}, and show a response-size and time sparkline across runs.
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