Build custom applications with Microsoft OneNote
By integrating your apps with OneNote, it's easier than ever to create empowering apps on your favorite platforms and reach millions of users worldwide. We're thrilled to introduce you support for Microsoft Office Add-Ins in OneNote Online. This allows you to develop add-ins for OneNote that are available straight from the Office Store. You can 1) Add new functionality to OneNote - Interacting with OneNote pages, sections, and section groups, bringing external data into OneNote, processing documents, exposing third-party functionality into OneNote clients, and much more. 2) Create new rich, interactive objects that can be embedded into OneNote Pages - for example, maps, charts, and interactive visualizations.