Check whether a public URL exposes L402, x402, or MPP discovery. Send url as a query parameter. POST JSON {"url":"https://..."} is the same check. Two free reports per client per 24 hours, then 0.05 USDC. A request without url is the payment challenge and does not use a free report.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.05 USDC | 0x7BB5...9D20 |