From their site: W3Counter is a free hit counter and live web stats for your website or blog. Log analyzers give you a report a day. W3Counter statistics are live. See who is on your site while they are on your site, plus 15 other panels of fresh, useful data. Integrate your web stats into your website, web applications or desktop widgets. The W3Counter Web Stats API makes it easy to access all the statistics we gather and aggregate for your websites.
The following is a list of historical changes that were made to this asset. Typically, once an API is published on ProgrammableWeb.com, the data we keep about that asset gets updated over the course of its life. For example, the endpoint or home page of the documentation might change. As a means of enforcing the integrity of our data, every time a non-trivial change is made to the data we keep about an asset, we require the entry of some changelog text before that change can be saved. This way, we have a great audit trail of all activity surrounding the asset. For each asset, the changelogs begins with the moment an asset is approved for publication on ProgrammableWeb. If you spot an error in our data and believe that a record needs to be updated in some way, the ProgrammableWeb team would very much like to hear from you at email@example.com