Dropbox Python API Webhooks

When you register a webhook URI, Dropbox will send the webhook notifications (both the verification request and the notifications requests) to the server identified by the URI you supply. In your case, you supplied a site on 'webhook.site', so those requests are sent to the servers at 'webhook.site', which are maintained by the owners of 'webhook.site'.

Separately, I see you're trying to run a Flask web app in your IDE. This would run locally, on your computer (i.e., on your localhost), not on the webhook.site servers. The requests sent to webhook.site aren't connected to your locally running code.

I also see that you are attempting to connect your webhook.site site to your own code using the '@app.route' decorator, but that would only define the routes in your own web app; it wouldn't connect it to the actual webhook.site site.

Dropbox webhook notifications are sent by the Dropbox servers, so they can only be sent to publicly accessible Internet addresses. Typically, when running a web app locally like you are, that web app is not publicly accessible. To be able to run your own code interactively for handling webhooks, you'd need to deploy your web app online and get a public address that you could register as your webhook URI. (Alternatively, there are some tools that would let you get an address to connect to your local app for testing, such as 'ngrok', but we can't provide support for third party tools themselves like this.)