I just noticed that the Web Cron Docs recommends accessing this URL (I just updated it to include https)
https://matomo.your-server.example/path/to/piwik/misc/cron/archive.php?token_auth=XYZ

Sending the admin token via GET isn't ideal, but it seems to be hardcoded:

Would it be possible to update the script to support POST (and mention it in the docs) or maybe even recommend people to directly call CoreAdminHome.runCronArchiving?