Pingdom’s Web service is currently the featured API at Programmable Web, an excellent resource covering all aspects of Web services and mash-up applications.
The Pingdom Web service API allows our customers to access all their monitoring data from Pingdom, for example the latest downtimes of their servers or websites, historical data, response times, raw check data from all monitoring servers, and the list goes on. It provides a flexible interface to build custom applications and websites on top of the Pingdom service.