# Overview
Date: 2012-02-24

Packages
com.google.appengine.api
com.google.appengine.api.appidentity: The app identity API allows an App Engine app to sign an arbitrary string blob using an internally-generated, rotated private key.
com.google.appengine.api.backends
com.google.appengine.api.blobstore: The blobstore API provides management and persistent storage of large, immutable blobs.
com.google.appengine.api.capabilities: The capabilities API.
com.google.appengine.api.channel
com.google.appengine.api.conversion: The Conversion API provides file conversion functionality.
com.google.appengine.api.datastore: The datastore provides persistent storage for App Engine applications, used either directly or via the provided JDO or JPA interfaces.
com.google.appengine.api.files
com.google.appengine.api.images: This package provides facilities for the creation and manipulation of images by Java code.
com.google.appengine.api.log
com.google.appengine.api.mail: App Engine applications can send email messages on behalf of the app's administrators, or of authenticated users, using the standard `javax.mail` interface over this low-level API.
com.google.appengine.api.memcache: The memcache API provides access to fast but unreliable data storage, which may also be accessed via the JCache API.
com.google.appengine.api.oauth
com.google.appengine.api.prospectivesearch
com.google.appengine.api.quota
com.google.appengine.api.search: The search package provides an API for indexing documents and retrieving them using search queries.
com.google.appengine.api.search.checkers
com.google.appengine.api.search.query
com.google.appengine.api.taskqueue
com.google.appengine.api.urlfetch: The URL Fetch service can be used to make HTTP and HTTPS requests of other servers on the internet.
com.google.appengine.api.users: The `UserService` provides facilities to check whether a user has authenticated using their Google Account, retrieve their email address, and check whether they are an administrator for this application.
com.google.appengine.api.utils
com.google.appengine.api.xmpp
com.google.apphosting.api