Simple API to check Salesforce MCP data via cloudpages

check-if-registered.amp

<script runat="server">
Platform.Load("core","1");
HTTPHeader.SetValue("Access-Control-Allow-Origin","*");
HTTPHeader.SetValue("Content-Type","application/json");
</script>%%[
VAR @email, @rowCount

/* Capture email & competition from URL if passed */
SET @email = RequestParameter("email")

/* Default values */
SET @rowCount = 0

/* Lookup email in the Data Extension */
IF NOT EMPTY(@email) THEN
   SET @rowCount = RowCount(LookupRows("Newsletter_Subscribers_NL", "email", @email))
ENDIF
]%%{"email": "%%=v(@email)=%%", "count" : "%%=v(@rowCount)=%%", "version":"6"}