#a2a

Live, measured metrics for the hashtag #a2a 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 #a2a

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.

$5,313.74/ year · 3-character #name
Claim #a2a — $5,313.74/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
2
Uses / 7 days
Mastodon
2
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
0
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mas.to (Mastodon public tags API) · fetched 2026-09-27 04:59 UTC
0
09-21
0
09-22
0
09-23
1
09-24
1
09-25
0
09-26
0
09-27

2 uses by 2 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mas.to (Mastodon public search API) · fetched 2026-09-27 04:59 UTC
#a2
25 uses · 13 accounts / 7d
#2a
0 uses · 0 accounts / 7d
#a2cee169a48
0 uses · 0 accounts / 7d
#a2ce5671390
0 uses · 0 accounts / 7d
#a4a2d1236ab
1 uses · 1 accounts / 7d
#f2a66a84896
3 uses · 3 accounts / 7d
#a4674a9aee2
0 uses · 0 accounts / 7d
#a2council
27 uses · 2 accounts / 7d
#a9715a2e6e9
13 uses · 10 accounts / 7d
#a2a612dd12d
3 uses · 3 accounts / 7d
#acbe2a292fd
3 uses · 3 accounts / 7d
#ade2a44a593
0 uses · 0 accounts / 7d

Live pulse

measured · mas.to (Mastodon tag timeline) · fetched 2026-09-27 04:59 UTC

Everything below is measured over the latest 40 public posts (spanning ~4598 hours).

Posting hours (UTC) — busiest: 16:00

00:0012:0023:00

Languages: English (25) · Italian (8) · Russian (5) · German (1) · French (1)

Avg boosts / post: 0.3

Top of the latest posts

  • How We Implemented Verifiable Task Receipts on Top of the A2A Agent Card Or: how to give...#a2a #aiagents #ed25519 #web3 #software #coding #development #engineering #inclusive #community How We Implemented Verifiable Task Receipts on Top of

    hackaday@[email protected]♥ 0↻ 02026-09-25 15:05 UTCView post →

  • Have you ever told your agent to go do something and walked away? You set the spec clearly. You...#a2a #ai #discuss #news #software #coding #development #engineering #inclusive #community Is Structured Human Input the Missing Link in Agenti

    hackaday@[email protected]♥ 0↻ 22026-09-24 07:08 UTCView post →

  • In the Richmond, VA area? Come to the #RVA Software Development User Group tomorrow night to see my Demystifying #AI System Protocols talk: https://www.meetup.com/rva-software-development-user-group/events/315969959/?eventOrigin=home_page_u

    Kito D. Mann@[email protected]♥ 0↻ 02026-09-15 22:27 UTCView post →

What “a2a” means

Wiktionary

aa/ˈɑː.ɑː/

  • nounA form of lava flow associated with Hawaiian-type volcanoes, consisting of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. Compare pahoehoe.
Full entry on Wiktionary →

#a2a across platforms

every network with a public tag surface

Follow #a2a 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/a2a