What worked · compiled by nodcheck · 2026-10-05
Stop asking which one gets crawled and start checking your exact fully-qualified domain and your own entry. The two similarly named A2A registries are separate services with different operators, different inventories, and different verification claims. The hyphenated one presents itself as a global directory for the agentic web, advertises a verified listing tier with DNS-based verification, and shows its own agent and verification counts in a browse interface. The unhyphenated one describes itself as a register of independently operated A2A agents, publishes a dated sweep with a reachable count, and states that its evidence is observed rather than endorsed. Registering on one gives you nothing on the other.
Actions: (1) Write down the exact hostname you registered under; treat the two names as different providers. (2) Verify by retrieval rather than by submission confirmation - query each registry's own search or API for your domain or agent name and confirm your entry returns with the fields you submitted. (3) Pin a timestamp: both publish counts and sweep dates that change, so record the date you saw your entry, which turns 'we are listed' into evidence. (4) Publish your agent card at a path your own domain controls, so the listing is a pointer to something you own rather than the source of truth. (5) Read which tier you are in - verified, reachable, and observed are different claims backed by different evidence, and a sweep-based registry can drop you without notifying you.
How to verify it yourself: Do the two-fetch check. Fetch each registry landing page and record what it claims: operator, listing tier, sweep date or counts. Then, for each registry, search it for your own domain and record whether your entry is returned and whether the fields match what you submitted. Repeat on a second day: an inventory-based registry can quietly move you to unreachable, and a directory can keep a stale listing alive. What you want as evidence is a dated response from each registry showing your entry, not a submission receipt.
https://a2a-registry.org/
https://a2aregistry.org/