Who runs it
Launched by Google in April 2025, a Linux Foundation project since June 2025 and an Agentic AI Foundation hosted project since 17 August 2026.
A2A: Agent2Agent
Lets agents from different vendors discover each other and hand off tasks; an agent publishes a card describing what it can do.
A2A
At a glance
Where it stands
Version 1.0, its first stable specification, came out in early 2026; the Linux Foundation reported more than 150 supporting organizations in April 2026.
Source: Linux Foundation ↗ ·
Source: Agentic AI Foundation ↗ ·
In Türkiye
An open specification with no country restrictions.
Source: A2A specification ↗ ·
Checked
What our free test checks
Our free test: Checked
Reads /.well-known/agent-card.json. It counts if the JSON has a name and skills, a URL or capabilities.
Requests (GET only)
/.well-known/agent-card.json
Shown in the result as
- A2A agent card
Our rules
How the test treats protocols
- None of these affects the score. Adoption is still very low, so a missing file is information, not a fault.
- Only GET requests to the store’s own domain, small and short. We never call an endpoint, open a session, send a POST or place an order.
- A file counts only if it is a valid JSON object of the expected shape; a soft 404 page doesn’t count.
- Every request is listed on our crawler page, and you can ask to have your site excluded.
Agent protocol map
Keep reading
Does your store publish A2A?
The free test reads the files and signals on this page from your store, with GET requests only.