REST is simplifying APIs. Its opening up APIs to casual developers and beyond.
have released API explorers. These tools allow easy exploration of RESTful interfaces.
REST exploration tools like Apigee Console, make APIs accesible by more than developers.
One example I came across recently is Intersect
is an API to get common friends, followers, and friends following from two Twitter accounts.
embedded an Apigee API explorer
for playing with Interesect.
With an Apigee Explorer any user can quickly change values in a query string and return data from the IntersectAPI.
We are entering a phase where APIs are available beyond just the development community, and accessible to a wider audience.