You can find the Dropbox developer site for API documentation and resources at Dropbox Developers. There, you can access various tools, SDKs, and guides for integrating Dropbox into your applications.
If you’re specifically looking for hosting discounts or offers related to Dropbox, I recommend checking for any partner hosting platforms or services that integrate with Dropbox. You may also want to check promotions related to cloud storage or hosting, such as Cloud Hosting or Web Hosting deals, which may offer useful discounts for developers.