Office 365 APIs
Access Office 365 data for websites or native applications running on iOS, Android, Windows, and other device platforms with the Office 365 REST APIs.
Try the Office 365 APIs
Office Add-ins (formerly Apps for Office)
Build an add-in that lives inside Outlook, Excel, Word, PowerPoint, or Project to extend what you can do from right in the documents, across devices and platforms — like pulling content from the web, calling mapping services, locating news, translating text, and more.
SharePoint Add-ins (formerly Apps for SharePoint)
Build SharePoint-hosted or provider-hosted add-ins to use remote web applications, surface remote data, offload business logic, access SharePoint list data, integrate with Office applications and services, make SharePoint a portal for other applications, and more.
Developer documentation for other Office products