Make (formerly Integromat)
Make (formerly known as Integromat) documentation
https://www.make.com/en/integrations/paced-email
To get started, create an OAuth application here: https://www.paced.email/developers
Add a name for your Make app and set the redirect URL to https://www.make.com/oauth/cb/paced-email3
Upon saving, you'll receive a Client ID and a Client Secret use these, along with your accoun ID when setting up a new connection within your Make account for the Paced Email app.