Our API directory now includes 199 email APIs. The newest is the Uptime Robot API. The most popular, in terms of mashups, is the SendGrid API. We list 10 SendGrid mashups. Below you'll find some more stats from the directory, including the entire list of email APIs.
As the number of APIs grows, more people are becoming familiar with the term. I had a taxi driver who knew about APIs, although that was in tech-heavy San Francisco. Despite becoming more known, "API" is not a term most mainstream users will use. Yet many of these same people are already asking for APIs—they’re just not using the term. Here are three ways mainstream users are asking for APIs.
To provide more options in searching for relevant contacts, Microsoft has decided to transition WorkingWith API users to its new People API. The People API not only provides more robust metadata than the WorkingWith API, the People API includes greater browse/search functionality and ranking system.