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Delx Commerce Live Probe — x402 Endpoint Liveness Check
x402
Delx Commerce Live Probe — x402 Endpoint Liveness Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Probes a single x402-enabled HTTPS endpoint to confirm it is live and returns a 402 payment-required response, without sending any payment.
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
A JSON object confirming whether the target URL returned an HTTP 402 status (indicating active x402 support), along with round-trip latency in milliseconds, a verifiable receipt ID, the observation timestamp, and a 'paid: false' flag confirming no payment was made during the probe.
Example use cases
Pre-integration x402 endpoint sanity check
“Before I wire up payments, can you check if https://api.acme-data.com/v1/report is actually live and responding with a 402? Tag it 'acme-report' so I can look it up later.”
Monitoring x402 service uptime
“I need to know right now whether https://api.nftprices.io/x402/quote is still up and accepting x402 handshakes — give me its latency and status without paying anything.”
Validating a newly deployed x402 API
“I just deployed my x402 endpoint at https://my-agent-api.xyz/api/pay — can you probe it and confirm it's returning 402 correctly? Label the check as 'deploy-verify'.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/live-probe?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify that a specific x402-compliant URL is live and correctly configured before integrating it into a payment workflow, or when you want a verifiable, timestamped observation receipt of a liveness check without risking any funds. Prefer this over general HTTP ping tools when the x402 protocol handshake itself (the 402 response) is what needs to be confirmed.
Side effects
- Target URL is not reachable — endpoint may be down or misconfigured, latency_ms may be high or absent
- Target URL does not return 402 — endpoint may not support x402, http_status will reflect the actual response code
- URL is malformed or too short (under 12 characters) — request will be rejected with a validation error
- URL exceeds 2048 characters — request rejected due to maxLength constraint
- Network timeout on probe — receipt_id may be zeroed and latency_ms unusually high
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Single https x402 endpoint to handshake. One URL per call; no payment is sent. |
| capability | string | Optional capability tag stored on the observation receipt for later directory queries. |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://api.example-x402.test/pay",
"kind": "x402_live_probe",
"paid": false,
"latency_ms": 42,
"receipt_id": "0000000000000000000000000000000000000000000000000000000000000000",
"http_status": 402,
"observed_at": "2026-08-14T19:00:00+00:00"
}
}Tags
x402
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