Any method to automate downloading webarchives?

Is there any way to automate the downloading of .webarchives every single day?

E.g. I want to capture the front page of BBC, the Financial Times, New York Times, … for reference.

Thanks in advance.

Create an Automator workflow to access and download the URL you wish to save to .webarchive and then save them to a particular folder. Save the workflow as an application.

Index that folder in DEVONthink.

In Calendar, schedule a recurring appointment to run that application. The specific method for doing this in Calendar will vary by OS X version – the internet will tell you how to do that for your version.