The WhoisXML Reverse IP API allows developers to discover all domain names at an IP address. This allows site owners to identify other websites sharing their IP address. It could also be used after an intrusion incident to identify attackers' host names. Both free and paid subscription plans are available. The free plan is limited to 250 queries per month.
Nineteen APIs have been added to the ProgrammableWeb directory in categories including Augmented Reality, Sentiment, and Bitcoin. One hightlight is the Create Free App API which enables easy code conversion from a website to a mobile application. Here's a rundown of the latest additions.