This is the webmention endpoint for sixtwothree.org.
If you’ve written something that references a page on sixtwothree.org, you can manually send a webmention with the following command:
curl -i -d 'source=http://example.com/path/to/your/post&target=https://sixtwothree.org/path/to/my/post' https://sixtwothree.org/webmentionsThere’s also a variety of plugins and services available for sending and receiving webmentions. See indiewebcamp.com/webmention for more details.