Your payment-authorisation address does not answer

It concerns AP2, the payment authorisation. The Agent Payments Protocol. It proves a real person authorised the agent to spend, so you are not taking an agent's word for it.

Most agents fail at this point. The few that find a way round it spend more time and model calls doing so, and may give up before checkout.

Point the UCP manifest at the live mandate endpoint, or remove the declaration. A payment protocol advertised and not served is worse than one not advertised: an agent plans a purchase around it and abandons at the last step.

Run the check that reported AP2_DECLARED_ENDPOINT_UNREACHABLE again after the change. The scan needs no account; an issue found during an AI shopping test needs that test run again.

$ npx @tragent/cli scan https://your-store.com

• No payment authorisation was presented
• The payment authorisation does not check out
• You accept payment authorisation without checking it