@sil a-ha. Nice side-effect of "just" using HTTP, simple HTML form (no JS) can send webmentions tantek.com/2013/258/t2/web-protocols-should-use-http-params-no-xml
@sil, @adactio's "Let me know the URL:" form just HTTP POSTs a webmention. His wm endpoint fetches content & posts it.
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