Gives a list of FAQ's, including:

General Questions

Error Messages

Constant Contact Signup Form Generator Issues

Authentication Issues

Constant Contact supports using the both the OAuth 2.0 server flow and client flow for authentication. These are much simpler flows than the equivalents from OAuth 1.0a. The server flow is best when your application is using the Constant Contact API from within your webserver code (for example, from within PHP or Java running on the server.) The client flow makes it simple to obtain an access token when calling the Constant Contact API from client langauges such as javascript. Read on to learn more about how to update your applications to use OAuth 2.0.

This Quick Reference gives developers an overview of the major APIs that Constant Contact supports.

Contact Capture Tool Version 2 allows you to sign up or update a contact's information, such as email address, first name and last name into Constant Contact conveniently from your desktop without having to log into Constant Contact's website

The Contacts collection and resource are used to list, create, modify and delete contacts (also known as subscribers) and to associate and disassociate contacts and contact lists.

While the Constant Contact REST API currently supports several authentication models, at this point (summer 2012) we request that developers use the OAuth 2.0 authentication model.  We will be announcing the end of support for Basic Authentication soon, and we stronly encourage developers to begin switching to OAuth 2.0 as soon as possible. Both the Server and Client flows from the OAuth 2.0 spec are now supported, so developers can choose the best approach for their application.

Each Constant Contact account allows you to upload and store images to be used in different email campaigns.  We now allow the developers use our APIs to upload and manage images as well as folders to which they belong. 

The Bulk Activity collection is used to create and manage bulk jobs, called Activities. Currently, the collection allows you to create jobs to add, remove and download contacts from contact lists.

Constant Contact provides a set of APIs that expose functionality in our Event Marketing product. The events collection and its assoicated operations let developers view events, event details, and event registrants.