Webhooks to create contacts and add them to a list

Hello,

So Typeform's integration with CC has been broken for several months (they apparently ignored the numerous emails about your API migration) and I've had to resort to using Zapier, which is clunky at best. Typeform recommended using Webhooks but I don't see any documentation on how to create a contact and add it to a specific list via webhooks. Looks like I would need to use the API. Is this correct?