If you are looking for interviews, you can use Inspect Elements Network tab to see the requests that your browser makes.

There is a POST request to Algolia (search provider, same as HN) that you could take and re-create in your own system to generate the RSS feed.

The POST data you are looking for is something like:

``` {"requests":[{"indexName":"interviews_publishedAt_desc","params":"query=&page=0&hitsPerPage=20"}]} ```

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With all of that said - your best bet is to ask @csallen on Twitter or post on IH itself.