It's search v's directory. The idea is you can post meta-data on an API on your own domain using a format http://www.apisjson.org/ that can then be crawled. Right now you still submit links, but it'll start crawling. So then anyone can write a search engine (the code for apis.io is open source).
With a directory like programmableweb it's useful but you need to put your data into the repository - and then remember to update it.
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How is it different than Programmable Web?
(http://www.programmableweb.com/apis/directory)
It's search v's directory. The idea is you can post meta-data on an API on your own domain using a format http://www.apisjson.org/ that can then be crawled. Right now you still submit links, but it'll start crawling. So then anyone can write a search engine (the code for apis.io is open source).
With a directory like programmableweb it's useful but you need to put your data into the repository - and then remember to update it.
With APIs.io you can launch your own ProgrammableWeb. ;-)