Nzbndx.com launched in 2013 and is still open to registration. The site is built on Newznab. A popular indexing platform used by several leading NZB sites. You can use Nzbndx to search for content and download NZB files or to make API calls.
Free members can download a limited number of NZB files and make some API calls. To integrate their engine with Sickbeard or CouchPotato and have plenty of API calls you’ll want to consider a VIP account. The cost is $12 a year. Along with more downloads and API calls you’re donation will help pay their overhead costs.
Not to be confused for a Usenet provider or newsreader software. Both of which you will need to download from Usenet. Nzbndx will help you find what your looking for across millions of newsgroup posts without the need for downloading headers.
Search for your subject of interest. Once you find what your looking for click on the name of the post for more details. Then you can download the NZB and open the newly created NZB file in your favorite Usenet client to download the contents.