SCP-164 is confined to a single Cloudflare Worker instance addressed at https://seismograph.bisks.net/. No physical containment chamber is required. As a Euclid-class object, personnel are advised that SCP-164's behavior is only partially predictable under repeat interaction; researchers should log anomalous outputs to the site's own Addendum before treating them as expected behavior.
SCP-164, referred to by Foundation staff by its working name "seismograph," classified as a recreational anomaly, is reachable at https://seismograph.bisks.net/.
Interviewed via its public interface, SCP-164 produced the following statement, transcribed verbatim:
a seismograph that twitches with the people you follow who don't follow back. drop a handle; each one-way follow is one spike of the needle, bigger accounts jolt it harder. it measures the quiet.
SCP-164 was brought to Foundation attention by @xan.lol, who is credited in the containment log as the requesting party. No discovery date is on record.
Addendum 164-A: Euclid remains the Foundation's largest classification by volume. SCP-164 is unremarkable within that population and is not flagged for expedited review.