An endorsement is the approval/support of someone or something, typically used to endorse someone's skills in an area.
- Eddie Hinkle started experimenting with endorsements by manually POSSE-ing an endorsement for a colleague on 2018-07-17 to LinkedIn.
- The approach for this first post was to treat the endorsement as a public reply to the other person's URL (in this case LinkedIn profile since it was a POSSE and the person didn't have a personal domain).
- Greg McVerry collected used webmentions to collect endorsements on a a proposal No special markup was used beyond asking audience to write an endorsement as a reply with relied on the u-in-reply-to microformats property.
- Webmentions were collected from brig.gy, websites that send webmentions, and anonymous webmentions from .