Hi. I am Collins from MailOptin.
Our most requested feature was Infusionsoft integration. We finally built it. We will love to be added to the IS marketplace.
Here are some documentation links on our integration with IS for your perusal. Note: we are using the Oauth2 authentication and the REST API.
By the way, trying to schedule an appointment from the email i received after submitting the marketplace form doesn’t work. Link is broken.
I logged in to marketplace dashboard today and and saw our company was rejected. I have sent ton of emails. no response