Where do I get my Test gateway account details from, for testing the site? You can find your test gateway account details within the MMS. We have a full user guide available within our developer zone, and your account can be found under Account Admin> Gateway Account Admin. Related articles Test Gateway ID Where do I get my Test card details, for testing the site? Where do I find the PreShared Key? Duplicate transaction error, First Data (29 August 2018) Where do I find Gateway ID and Gateway Password?