Integration with email marketing automation

I use Brevo and Active Campaigns. When a customer trial is coming to an end, I would like to trigger an automated, custom email chain to encourage them to sign up (Book a call with me now, Can I help, Did you know that...). I'd also like trigger an email a couple of days after a trial has been setup IF the client hasn't added a domain or setup DMARC. Maybe this can be managed through the API?