@jyasskin @pointlessone A little context: Significant Memento infrastructure was operated as an official service of the LANL Research Library. That included a web archive aggregator (that leveraged Memento interoperability) covering the holdings of 30-ish web archives, Robust Links tools, and APIs for both. A few months ago, the Research Library decided to pull the plug on the infrastructure. There are contacts with @internetarchive aimed at resurrecting some components.