These APIs are available to any network implemented on top of the PeopleAggregator platform. See peopleaggregator.net for an example. From their site: PeopleAggregator brings social web features to existing software or provides a stand alone social network of your own. We've got source code available or we can build you a SaaS system to your specifications.
The following is a list of sample source code snippets that matched your search term. Source code snippets are chunks of source code that were found out on the Web that you can cut and paste into your own source code. Whereas most of the sample source code we've curated for our directory is for consuming APIs, we occasionally find something interesting on the API provider side of things. If you know of some sample source code that would be of interest to the ProgrammableWeb community, we'd like to know about it. Be sure to check our guidelines for making contributions to ProgrammableWeb.