For registration pages that are built with GoHighLevel page builder see this article. StealthSeminar Support is happy to do this for you.
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For autoresponders/follow-up emails/campaigns, you can use either of these options:
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1) Zapier

2) Webhooks/StealthSeminar API: This option is something you need to custom code from your end, following this documentation. For more reference, you may see here.
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