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unprice /pay/ping
x402
unprice /pay/ping is a paid API for AI agents from volkov.evgeny.m2.fvds.ru, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-10).
Health/liveness check endpoint that confirms the x402 pay-per-request gateway is reachable and that a USDC micropayment was successfully processed.
Price / call$0.001
Success—
StatusUnknown
How this service works
Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.
Output
A JSON object with three fields: 'ok' (boolean, true if the gateway is healthy), 'ts' (ISO 8601 timestamp of the response), 'paid' (boolean, true if the x402 micropayment was accepted), and 'payTo' (the Ethereum address on Base that received the USDC payment).
Example use cases
Verify x402 payment gateway liveness
“Check whether the unprice pay-per-request gateway is up and confirm my USDC payment on Base actually went through — give me the ok status and the wallet address it was sent to.”
Pre-flight check before agent workflow
“Before my agent starts calling the unprice fetch and IPFS APIs, ping the /pay/ping endpoint to make sure the x402 gateway is healthy and accepting USDC payments.”
Debug a failed micropayment
“I think my x402 USDC payment on Base didn't go through — can you hit the unprice ping endpoint and tell me if paid comes back true and what timestamp it shows?”
Technical details
Endpoint
GEThttps://volkov.evgeny.m2.fvds.ru/pay/ping?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify that the unprice x402 micropayment gateway is operational and that a USDC payment on Base was correctly received, before or after invoking other unprice pay-per-request APIs (fetch, IPFS, DNS, JSON). It is the lowest-cost ($0.001 USDC) liveness probe for the entire unprice service suite.
Side effects
- Payment not included or insufficient USDC — gateway returns HTTP 402 Payment Required
- Network or server downtime — connection timeout or 5xx error
- Invalid or missing x402 payment header — 400 Bad Request
- USDC balance insufficient on Base — payment rejected before response
- Wrong network (not Base) — payment not recognized
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"ts": "2026-08-17T13:00:00.000Z",
"paid": true,
"payTo": "0xdD1729943bf7C408456cef52886ad12B05B57dC2"
}
}Tags
x402
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