Identity API allows developers to perform various user identity and account functionalities, such as getting the identity (DID) of a user (address), linking new addresses to the DID, and adding new authentication methods to the DID.
Auth API allows developers to request access to a user's 3Box profile and spaces. Authentication is required to update any data, decrypt private data, and generally interact with the user's data stores in a meaningful way.
Profiles API allows developers to perform various actions on the user's general profile, including getting and setting public and private profile information. The general profile is used to keep information that can easily be shared across apps, such as name, image, group affiliations, and public social verifications.
Storage (Spaces) API allows developers to perform various actions on the user's spaces, including getting and setting public and private information. Spaces are sandboxed stores used to keep information specific to an application or context, such as user generated content, documents, preferences, settings, and more sensitive information.
Messaging (Threads) API allows developers to perform various actions on message threads including creating threads, getting and setting data to threads, and adding moderators. Threads are feed stores that are great for supporting social messaging, commenting, and chat systems between 1 or many users, for any application. They're also great for creating single or multi-user content streams and sharing data between users. Threads are available in persistent or ghost varieties.