I don't see any RIR approving a bulk WHOIS request on a weekend alone, but the way is like this:
https://www.arin.net/reference/research/bulkwhois/

Rubens

On Sat, Jun 27, 2020 at 3:43 PM Lars Prehn <lprehn@mpi-inf.mpg.de> wrote:
Hi everyone,

Is there a "fast" way to obtain a snapshot of the RDAP databases from
each RIR (e.g., http://rdap.db.ripe.net/) for local use? I saw some
presentations on proposals for RDAP monitoring, but couldn't find any
working implementations. I want to run a massive amount of requests
against it (for a research project) and would like to keep the load on
the RIR APIs low.

Unfortunately, our deadline is Monday night. Therefore "fast" really
boils down to 'till tomorrow'.

Thanks for answers in advance!

Best regards,

Lars