Farcaster Devs

Building a frame in Frog, I would like to take user input in a frame, use that in an API call, and pass that response to another page in the frame.

What's the proper way to accomplish this?

I see things in docs for onchain actions like `app.transaction` but nothing for arbitrary API calls.

You can get the input only if user click the button, then pass it as a query params.
For example, I write a lucky draw frame, when the owner click draw button, the path "/" will be called, then I can get the user's input and do something, like request api or pass that to anthoer page.