I need API to connect my dropbox account with the web application. And also I have to fetch the files from folders dynamically. Please help on this.
Dropbox does offer an API you can use for listing, uploading, and downloading files, among other operations. You can find everything you need to get started with the Dropbox API, including documentation, tutorials, and SDKs here:
https://www.dropbox.com/developers
You may want to check out the Getting Started guide:
https://www.dropbox.com/developers/reference/getting-started
Also, the File Access Guide may be helpful:
https://developers.dropbox.com/dbx-file-access-guide