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I’ve built an integration that interacts with a vendor’s API.  One of its POST endpoints includes the ability to register a callback URL, which I supply the URL that’s generated by a Zap’s “Webhook by Zapier” step.  Currently, this  architecture works fine.

I noticed that the Formstack app has a “New Submission” trigger that is marked as “instant”.  How this defined in the app’s code?  Is there a way to generate a callback URL (https://hooks.zapier.com/hooks/catch/X/Y/) in the integration that is available to be registered with the vendor’s API?

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