Does your x402 endpoint ask for payment?
A buyer's agent can only pay an endpoint that answers 402 with payment requirements it can read. addrbook sends each listed x402 endpoint an unpaid request and records what came back, dated. It never pays. Find yours and see what the last check found.
How many answer
| Source | Listed | Checked so far | Answered their last check |
|---|---|---|---|
| x402 Bazaar | 58,102 | 1,748 | 96.2%1,682 agents |
| Agentic.Market | 1,806 | 501 | 91.8%460 agents |
Endpoints the x402 catalogues list today. As of ; the share answering is of those checked so far. All the numbers
What each check records
- Whether the endpoint answered 402 with payment requirements addrbook could parse.
- Its response time, and uptime over 24 hours and 30 days.
- Which wallets the catalogues name for it, attributed to each catalogue.
The request is an unpaid GET, or an empty POST for POST-only routes. The probe policy has the details.
Alerts are not open yet
Next: claiming your endpoint by signing with its pay-to wallet, and an email when it stops answering or its payment requirements change. To be told when that opens, or to tell us what should trigger an alert, write to us.
Rather not be checked? Write to optout@addrbook.com; opt-outs are honoured within 24 hours.