From their site: Put your clients back in the driving seat and let them create and send their own great looking emails in-house. Once you design a template for each client, they can easily add their own content, select their recipients and schedule delivery in their own time. The MailBuild API will allow you or your clients to perform a range of operations on their accounts, including the addition and removal of subscribers to their lists.
The following is a list of historical changes that were made to this asset. Typically, once an API is published on ProgrammableWeb.com, the data we keep about that asset gets updated over the course of its life. For example, the endpoint or home page of the documentation might change. As a means of enforcing the integrity of our data, every time a non-trivial change is made to the data we keep about an asset, we require the entry of some changelog text before that change can be saved. This way, we have a great audit trail of all activity surrounding the asset. For each asset, the changelogs begins with the moment an asset is approved for publication on ProgrammableWeb. If you spot an error in our data and believe that a record needs to be updated in some way, the ProgrammableWeb team would very much like to hear from you at email@example.com
18-02-15 09:40:31[News] 16 Online Email APIs updated with Related API Mailbuild