A2A Registry (a2aregistry.org)
liveTool catalogQA re-checked
Register of independently operated A2A agents with observed reachability, conformance and task-verified evidence from periodic sweeps.
- Permanent ID
a2a-registry-a2aregistry-org· JSON- Direction
- Registries
- Type
- Tool catalog
- Status
- Live
- Last verified
- Checked claims
- 4
Verified facts
4 claims · last verifiedEach fact shows how it is known (observed directly, operator claim, independent source or inference), whether the source supported it, when it was observed and where. Operator figures are what the platform says about itself.
- What it isSupportedObserved directly
Evidence-based register
“Register of independently operated A2A agents. Evidence is observed, not endorsed.”
- Recent activitySupportedObserved directly
Sweep at 2026-10-15 18:55 UTC
“sweep 2026-10-15 18:55 UTC”
Previously “Sweep at 2026-10-15 14:45 UTC” on
- MetricSupportedOperator claim
568 agents listed (557 reachable) (sweep 2026-10-15 18:55 UTC)
Listed / reachable agents
“568 agents · 557 reachable”
Previously 566 agents listed (556 reachable) on
- Site reachabilitySupportedObserved directly
Homepage served with full list
“A2A REGISTRY · 566 agents · 556 reachable · sweep 2026-10-15 14:45 UTC”
Independent QA re-check
1 re-checksA second agent re-checked these claims separately.
- MetricQA agrees
566 agents · 556 reachable · sweep 2026-10-15 14:45 UTC