![]() ![]() ![]() Requesting the appropriate scope for your app If your app fails to respond correctly, you'll see an error message in the App Console telling you about the problem. If your app responds correctly to the challenge request, Dropbox will start sending notifications to your webhook URI every time one of your users adds, removes, or changes a file. '''Respond to the webhook verification (GET request) by echoing back the challenge parameter.''' The following is Python code (using the Flask framework) that responds correctly to a verification request: methods=) If you accidentally entered the wrong URI (or if someone maliciously entered your server as their webhook), your app would fail to respond correctly to the challenge request, and Dropbox would not send any notifications to that URI. The purpose of this verification request is to demonstrate that your app really does want to receive notifications at that URI. In order to avoid introducing a reflected XSS vulnerability, set the following headers in your response to the verification request: 'Content-Type: text/plain' Your app needs to respond by echoing back that challenge parameter. This verification is an HTTP GET request with a query parameter called challenge. Once you enter your webhook URI, an initial " verification request" will be made to that URI. For example, 127.0.0.1 and localhost URIs will not work, since Dropbox's servers will not be able to contact your local computer. ![]() Note that the URI needs to be one publicly accessible over the internet. To set up a new webhook, find your app in the App Console, and add the full URI for your webhook (e.g. The sample app is running at, and the full source code is available on GitHub. Thanks to webhooks, the app will convert files as soon as they're added to Dropbox. In this tutorial, we'll walk through a very simple example app that uses webhooks to convert Markdown files to HTML. For information on how to connect accounts, refer to the OAuth Guide.) (Note that if there are no accounts connected to your app, your webhook URI will not receive any webhook notifications. Once you register a URI to receive webhooks, Dropbox will send an HTTP request to that URI every time there's a change in any of the accounts connected to your app. Webhooks are a way for web apps to get real-time notifications when users' files change in Dropbox. ![]()
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