# A2A Registry: AI Tool Listing, A2A protocol agents only (a2aregistry.org)

> A2A Registry is an AI directory at a2aregistry.org. It lists AI products, with a rule: A2A protocol agents only. The price is not stated on its pages. The link you get is dofollow: the Launch endpoint and agent card links on a live listing carry no nofollow (checked on the Flux page). Review: an agent is registered once its card is reachable and valid, after the submitter reviews the evidence shown; anyone can flag a listing. Terms read on a2aregistry.org on 3 October 2026.

Register of A2A agents that checks each one for reachability and uptime; the home page counts 387 agents. An agent is added by pasting its agent card URL.

- Site: https://a2aregistry.org/
- Kind: AI directories
- Verdict: A2A protocol agents only
- Price: Not stated
- Link you get: Dofollow: the Launch endpoint and agent card links on a live listing carry no nofollow (checked on the Flux page)
- Review: An agent is registered once its card is reachable and valid, after the submitter reviews the evidence shown; anyone can flag a listing
- Reach: small (outside the Tranco top million; #7176772 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://a2aregistry.org/submit
- Checked: 2026-10-03

Page: https://listaify.com/places/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