#pubsubhubbub

Live, measured metrics for the hashtag #pubsubhubbub from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #pubsubhubbub

This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.

$5.00/ year · 12-character #name
Claim #pubsubhubbub — $5.00/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
15
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 15
0.1
Avg reactions / post
Mastodon · last 15
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.online (Mastodon public tags API) · fetched 2026-10-02 06:43 UTC
0
09-26
0
09-27
0
09-28
0
09-29
0
09-30
0
10-01
0
10-02

0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.online (Mastodon public search API) · fetched 2026-10-02 06:43 UTC

No related tags with measured usage found for #pubsubhubbub.

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-10-02 06:43 UTC

Everything below is measured over the latest 15 public posts (spanning ~144200 hours).

Posting hours (UTC) — busiest: 22:00

00:0012:0023:00

Languages: English (10) · German (4)

Avg boosts / post: 0.7

Top of the latest posts

  • ActivityPub – The evolution of RSS Dave Winer (@davew) stellt (sich) auf seinem Blog und auf Mastodon die Frage: What does ActivityPub does that RSS doesn’t? und nimmt vorweg: Off the top of my head, it’s not the ability to syndicate, RSS a

    Matthias Pfefferle@[email protected]♥ 1↻ 102024-04-26 12:02 UTCView post →

  • Just found out about #PubSubHubbub and now I'm outraged the W3C renamed it to #WebSub

    Emerald :scizor: :lycanroc:@[email protected]♥ 1↻ 02023-06-24 22:41 UTCView post →

  • WebSub WebSub is one of those underrated technologies that quietly work in the background of the web and that I appreciate quite a bit. It's not super hard to implement and... https://lostfocus.de/2026/08/17/websub/ WebSub

    Dominik Schwind@[email protected]♥ 0↻ 02026-08-17 06:29 UTCView post →

#pubsubhubbub across platforms

every network with a public tag surface

Follow #pubsubhubbub straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/pubsubhubbub