Uses b2b-v3-ga4-purchase-send-func (same path as backend purchase): POST to /mp/collect with curl_test_mp and debug_mode (DebugView). HTTP 204 and an empty body are normal.
b2b-v3-ga4-purchase-send-funcHTTP 204
requestedPostUrl: https://www.google-analytics.com/mp/collect?measurement_id=G-S6VG3QDCH8&api_secret=Cocz9V40TGWD_DPVa1mD7Q
{"responseHttpCode":204,"requestedPostUrl":"https://www.google-analytics.com/mp/collect?measurement_id=G-S6VG3QDCH8&api_secret=Cocz9V40TGWD_DPVa1mD7Q","payload":{"client_id":"1730000000.1730000001","events":[{"name":"curl_test_mp","params":{"debug_mode":1,"engagement_time_msec":1}}]},"response":""}