Sites using Agent2Agent Protocol
Open standard for interoperable communication between independent AI agents, governed by the Linux Foundation.
Found via: StackScope Discovery (Indie) 2 · StackScope Wider Web 3
Agent2Agent Protocol has been detected on 5 launches since first appearing in August 2026. Most recent detection: Property Defect — Real Estate Intelligence, 6 days ago.
It's most commonly paired with Google Fonts, Google Search Console, and Cloudflare DNS.
Share of new sites using Agent2Agent Protocol
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites.
Amber: on 10 September 2026 we improved our infrastructure so we can index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
Protocol leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – | HTTP/3 | 46.70% | 100.01% |
| #2 | – | Tor Onion Service | <0.01% | 0.01% |
| #3 | ▼3 | United States Semantic Standard | <0.01% | <0.01% |
| #4 | ▼1 |
I2P
|
<0.01% | <0.01% |
| #5 |
TDM Reservation Protocol
|
<0.01% | <0.01% | |
| #6 | ▲7 | Agent2Agent Protocol Current page | <0.01% | <0.01% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Protocol tool.Among September launches it ranked #3 in Protocol, up from #10 in August. All 19 in Protocol →
Often used with
| Tool | Sites |
|---|---|
Google Fonts
|
4 |
Google Search Console
|
3 |
Cloudflare DNS
|
3 |
Cloudflare
|
3 |
| HTTP/3 | 3 |
Tools most often detected on the same sites as Agent2Agent Protocol.
Recent launches we can show
2 of the 5 sites using Agent2Agent Protocol are product launches we list individually. The other 3 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
The StackScope API serves all 5 sites using Agent2Agent Protocol, filterable and exportable, from £15 a month.