# A2A Check

Is your brand A2A compliant?

A completely free validator for Agent2Agent Protocol.

No email or signup required, results in seconds.

## What this site is

A2A Check is an independent, free validator for Agent2Agent Protocol. Validate A2A Agent Card discovery, schema, skills, and side-effect-free JSON-RPC and REST probes. It validates against spec version 1.0.1.

## What it checks

- Agent Card
- Schema
- Skills
- Live probes

## How to use it

Submit the full URL where your A2A surface lives — not a bare domain — at https://www.a2acheck.org/check?url=<your-url>. We fetch that single endpoint plus any endpoints your manifest declares. There is no signup and no account.

## More pages

- [About A2A](https://www.a2acheck.org/about.md) — What Agent2Agent Protocol is and why it matters.
- [Methodology](https://www.a2acheck.org/methodology.md) — How A2A Check validates A2A endpoints.
- [FAQ](https://www.a2acheck.org/faq.md) — Common questions about A2A and this validator.
- [Resources](https://www.a2acheck.org/resources.md) — A2A spec links and related tools.
- [For site admins](https://www.a2acheck.org/bot.md) — Bot identification, credentials handling, and what we retain.
- [Glossary](https://www.a2acheck.org/glossary.md) — Definitions of A2A and agentic commerce terms.
- [Site map](https://www.a2acheck.org/sitemap.md) — Every A2A Check page available as Markdown.