How Do You Sync Frontend and Backend Without Waiting on APIs?

Quick question for teams here .
How do you handle API collaboration when the backend isn’t ready yet?
I’ve tried using mock servers with Swagger, but it’s clunky.Would love to know if there’s a smoother way.

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You can create a Webhook node in “Listen to test event” mode (test URL) that allows the frontend to send requests while the real backend is still being developed. Then, use a Respond to Webhook node to manually define what data is returned, even supporting custom or mock data using an Edit Fields (Set) node or a Code node to generate fake responses.

If the frontend depends on receiving a response that will arrive later (for example, while the backend is processing something asynchronously), you can use the Wait node with the “On Webhook Call” or “After Time Interval” options. This allows the flow to pause and then resume when a webhook call is received (useful for testing or waiting for a signal from the backend).

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Me I use Apidog I tink is good for that, since it includes mock APIs and auto‑generated docs.

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