Choose the type of access you need (App folder or Full Dropbox), name your app, and click Create app
Click over to the Permissions tab, tick the boxes for all data you'd like to access, and click Submit. Note: this step must be done before you generate your token, as the token's scopes can't be updated later (if you need to change or add scopes, you'll need to delete your app and create a new one).
Now click back to the Settings tab of your app. Scroll down the page and click Generate to get your token. Copy this token down and keep it safe, we'll need it shortly.
Part 2: Get Dropbox Data in Sheets
You can see the full list of available endpoint and parameters in the API documentation. For example, to get a list of the files in the root folder of your Dropbox account, run a request like this:
Open up Google Sheets and click Extensions > API Connector > Open > Create request.
Create a new tab and click Set current to use that tab as your data destination.
Name your request and click Run. A moment later you’ll see a list of files populate your sheet.
The above request contains "path":"", indicating that it's fetching files from the root directory. To get files from a particular folder, replace the empty quotes with the folder's path.