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Mercer x402 Ping (Hub Probe)
x402
Mercer x402 Ping (Hub Probe) is a paid API for AI agents from x402.lucidcove.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns a timestamped pong JSON after a $0.001 USDC micropayment, serving as an end-to-end connectivity and settlement canary for x402 clients.
Price / call$0.001
Success—
StatusUnknown
How this service works
Settlement canary: returns a timestamped pong JSON after USDC micropayment. Use to verify x402 client + wallet + facilitator end-to-end.
Output
A small JSON object containing a 'pong' acknowledgment and a server-side timestamp, confirming that the x402 payment was received and settled, and that the full client-wallet-facilitator pipeline completed successfully.
Example use cases
x402 integration smoke test
“I just set up my x402 wallet and facilitator — can you fire a quick ping to verify the whole micropayment flow actually works and show me the timestamped pong you get back?”
Agent fleet payment health check
“Before deploying my agent fleet, I want to confirm each agent's x402 USDC payment stack is functional — run a settlement canary ping and show me the timestamp so I know it settled correctly.”
Debugging a broken x402 setup
“My x402 client stopped working after I rotated my wallet keys — can you send a test ping through it so we can see whether it successfully pays and gets a pong, or where it fails?”
Technical details
Endpoint
GEThttps://x402.lucidcove.org/v1/pingWhen to prefer
Use this endpoint specifically when you need to verify that an x402 micropayment stack (client, wallet, and facilitator) is wired together correctly end-to-end. It is purpose-built as a cheap ($0.001 USDC) settlement canary, making it ideal for smoke tests, CI/CD health checks, and debugging payment pipeline issues before invoking more expensive x402-enabled services.
Side effects
- Payment not included or malformed x402 header — server returns 402 Payment Required
- Insufficient USDC balance — payment rejected before a pong is returned
- Wrong facilitator endpoint configured — request never reaches the server
- Network timeout — no response, indicating connectivity issue downstream
- Invalid wallet credentials — payment authorization fails silently or with a 401/403
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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