The PLOS ALM API is used by the PLOS journal websites, ALM Reports, and the PLOS Search indexer, altogether more than 8 million API requests every month. Martin Fenner wrote a post on his work with the PLOS ALM API. He talks about making an API that is simple, fast, and fun to use.
The Search API is a great tool to find interesting PLOS articles, and the ALM API can then collect metrics about these articles. Using the R statistical programming language is one of the easiest ways to look at these metrics. Below are a few example visualizations, the source code to all of them can be found in the plosOpenR Github repository.
A copy of the Solr schema for the PLoS Search API is now available at: