#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.
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.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-10-13 10:15 UTC1 uses by 1 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-10-13 10:15 UTCLive pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-10-13 10:15 UTCEverything below is measured over the latest 40 public posts (spanning ~5750 hours).
Posting hours (UTC) — busiest: 16:00
Languages: English (31) · Russian (6) · French (2) · Italian (1)
Avg boosts / post: 0.2
Top of the latest posts
📢 Great news in agentic open standards world: the Agent2Agent (A2A) protocol is joining the Agentic AI Foundation! #A2A is an open standard for seamless communication and collaboration between AI agents. No more need for custom integration
Quite an interesting forward-looking conversation on this week's #ITOps Query vodcast! Outshift by Cisco published a whitepaper titled "Scaling out Superintelligence" in January that suggests that new standard network layers will be require
One common challenge with #agentic systems is agent/tool discovery. To solve this, I built a registry service for #a2a, #mcp, #acp, and message-based #a2a, so virtually any agent/tool can list itself for discovery within a system. https://g
What “a2a” means
Wiktionaryaa/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.
#a2a across platforms
every network with a public tag surfaceFollow #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.
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