Hi @shweta_singh DCS calls only seems to work from a Browser. It seems that when the call is fired it still relies on uuid cookie value within demdex.net domain. This means even if I pass UUID like so https://XXXX.demdex.net/event?d_rtbd=json&d_jsonv=1&d_sid=13640977&d_uuid=5897526526567269568335837...