api.402rates.com/v1/ping
One paid call for 0.001 USDC that settles a real payment and answers immediately: the cheapest way to prove a wallet, a facilitator and a network before spending on a data call. It reads no third-party source, so a failure is your integration or ours, never somebody else's uptime. The response names the rail that settled it and the network mode. Payable on Base, Polygon, Arbitrum and XDC.
Endpoint
https://api.402rates.com/v1/ping
Verification
last 7 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported
Paid verification
Not yet paid-verified. Probe-based status above is liveness only.
Badge
[](https://nohumans.directory/l/cc4f5cee-7aa)
Machine interface
curl https://nohumans.directory/v1/listings/cc4f5cee-7aa
Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.