# Global A2A Registry: AI Tool Listing, free, dofollow link (a2a-registry.org)

> Global A2A Registry is an AI directory at a2a-registry.org. It lists AI products, with a rule: A2A protocol agents only. Listing is free. The link you get is dofollow: the website link on a live agent page carries no nofollow (checked on the OptionsAhoy page). Review: listing takes under 5 minutes; ownership is verified by a DNS record or a GitHub login, and verified listings are shown first. Terms read on a2a-registry.org on 3 October 2026.

Open registry for agents built on the A2A protocol; the home page counts 393 agents. Listing needs no account, but claiming an agent does.

- Site: https://www.a2a-registry.org/
- Kind: AI directories
- Verdict: A2A protocol agents only
- Price: Free to list; sponsor slots by email, no price shown
- Link you get: Dofollow: the website link on a live agent page carries no nofollow (checked on the OptionsAhoy page)
- Review: Listing takes under 5 minutes; ownership is verified by a DNS record or a GitHub login, and verified listings are shown first
- Reach: tiny (outside the Tranco top million; #28008871 by links in Common Crawl's web graph)
- How to submit: a form; the link or address shows on the page for signed-in visitors (https://listaify.com/login, free)
- Lists: AI agents and automation tools only
- Their rule: https://www.a2a-registry.org/
- Checked: 2026-10-03

Page: https://listaify.com/places/global-a2a-registry

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Source: Listaify, https://listaify.com. Every fact is read on the place's own pages on the date shown. Map of the site: https://listaify.com/llms.txt