single-standard site

A  single-standard site  is a website dedicated to a single open standard specification, both presently like https://webmention.net/ and past defunct sites like site-deaths, as well as some zombie sites like portablecontacts net.

Examples

 * https://webmention.net/
 * https://micropub.net/
 * https://indieauth.net/

Similar
Similar standards sites, though based on specific suites or "stacks" of standards
 * OpenSocial
 * OStatus

Past

 * site-deaths
 * portablecontacts.net
 * webdav(.)org