Can I Verify If an Email Address is on a Opt-Out List Through an API
At this time, we don't have functionality that supports validating if an email address is on Opt-Out List through a 1-to-1 API call (Real-Time Pinging), where you would send us a email address via an API call and we would validate if it is on one of the Opt-Out Lists in your account.
As a workaround, you can leverage our Mailer API which will allow you to export and cleanse (de-dupe) an Opt-Out List from your SUPPRESS account via an API.
If you have further questions, please contact us: support@optizmo.com