---
title: "A2A: what it is and what we check · Specoria"
description: "Lets agents from different vendors discover each other and hand off tasks; an agent publishes a card describing what it can do."
source_url: "https://specoria.com/agent-protocols/a2a/"
lang: "en"
---

AGENT PROTOCOL MAP Facts checked against their sources on October 8, 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

### 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.

### 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 ↗](https://www.linuxfoundation.org/press/a2a-protocol-surpasses-150-organizations-lands-in-major-cloud-platforms-and-sees-enterprise-production-use-in-first-year) · April 9, 2026

Source: [Agentic AI Foundation ↗](https://aaif.io/blog/a2a-joins-aaif) · August 17, 2026

### In Türkiye
An open specification with no country restrictions.

Source: [A2A specification ↗](https://a2a-protocol.org/latest/specification/) · October 8, 2026

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.

[Every request our crawler makes →](https://specoria.com/bot/)

Agent protocol map

## Keep reading

### Other protocols

[UCP](https://specoria.com/agent-protocols/ucp/) · [ACP](https://specoria.com/agent-protocols/acp/) · [MCP](https://specoria.com/agent-protocols/mcp/) · [WebMCP](https://specoria.com/agent-protocols/webmcp/) · [Web Bot Auth](https://specoria.com/agent-protocols/web-bot-auth/) · [llms.txt](https://specoria.com/agent-protocols/llms-txt/)

[All eight protocols on one page →](https://specoria.com/agent-protocols/)

## Does your store publish A2A?

The free test reads the files and signals on this page from your store, with GET requests only.

[Run the free test on your store →](https://specoria.com/#contact)[How the free test works →](https://specoria.com/method/)