The Marshall Project: The Marshall Project Partners With DocumentCloud for Upgraded Klaxon Site-Monitoring Tool. “Klaxon Cloud allows reporters, editors and other researchers to monitor scores of websites, including data-heavy government and corporate sites, for newsworthy changes…. Klaxon has always been free and open-source, but thus far has required each newsroom to set up, configure and maintain its own server. To help broaden who can take advantage of this powerful tool, The Marshall Project and MuckRock collaborated to create Klaxon Cloud, a modified version of Klaxon that is incorporated into DocumentCloud.”
If you’re currently looking for a page change monitor and you can’t use this for whatever reason, I highly recommend ChangeDetection.io. Tons of features and monitors up to 5,000 URLs for $8.99, which is a steal. I’ve been a happy, full-paying customer since February 2023 and receive no remuneration whatever for this recommendation.