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A2A Registry on new websites

Registry and discovery service for AI agents using the Agent-to-Agent (A2A) protocol.

Sites using A2A Registry
9
since May 2026
Last 30 days
0.0%
of new sites, to Oct 20
no change on the 30 days before
Last 7 days
0.0%
of new sites, 7-day average
no change on the week before
Rank in Directory
#324
of 1276 tools, all time
First seen May 11, 2026
Last seen Oct 20, 2026
Website a2a-registry.org

What we found

  1. A2A Registry appeared on 3 new sites in the last 30 days.[1]

Share of new sites using A2A Registry

0.0000% 0.0001% 0.0002% 0.0003% 0.0004% 15 Sep Oct

The line is the 7-day average share of new sites that use A2A Registry, since 15 September. It starts at our first detection.

Directory on new sites

# Movement Tool Share of all sites Share of category Bar
1 – Product Hunt 0.1% 28.3%
2 – TradeIndia <0.1% 10.3%
3 ▼1 Fazier <0.1% 6.4%
4 ▼1 Startup Fame <0.1% 5.5%
5 ▼7 ExportersIndia <0.1% 5.2%
…
324 ▲129 A2A Registry <0.1% <0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Directory tool. Among September launches it ranked #240 in Directory, up from #369 in August. All 1276 in Directory

Recently launched products built on A2A Registry

5 of the 9 sites using A2A Registry are product launches we list individually. The other 4 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

Site Found Also detected
The Global A2A Registry a2a-registry.org · Developer Tools Oct 20 Next.js React Cloudflare Google Analytics
Check a contractor quote against U.S. public data | HORIZON SHIELD horizonshield.dev · Finance · Japan Oct 9 Cloudflare
Elderly Care Match elderlycarematch.com · Directory Sep 22 React Vercel Facebook Google Ads
BerrerGate — Tool & Provider Intelligence for AI Agents berrergate.com Aug 29 Cloudflare
Fodda fodda.ai · AI May 11 Airtable Amazon SES GoDaddy DNS Google Analytics

Watches, exports and the API give you all 9 sites using A2A Registry, from £15 a month.

Notes

  1. These figures cover websites that went live since April 2026, not the web as a whole.

How this page is made

FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards A2A Registry when we detect A2A Registry on it at that look.

Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.