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Settled x402 Endpoint Liveness & Quote Checker
x402
Settled x402 Endpoint Liveness & Quote Checker is a paid API for AI agents from settled.justinedwardvolmer.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-03).
Probes an x402 HTTP endpoint unpaid to verify it is live, returns its parsed payment quote (price, network, payTo), latency, schema completeness, on-chain payer activity on Base, a quality score, and risk flags — all before you commit to paying.
Price / call$0.002
Success—
StatusUnknown
How this service works
Live liveness + quote check for any x402 endpoint: probes it unpaid (cached ≤5 min), returns status, latency, parsed price/network/payTo, schema completeness, on-chain payer activity (Base), quality score and risk flags. Call before paying an unfamiliar endpoint.
Output
Returns liveness status (up/down), measured latency, parsed payment quote (price in USDC, network, payTo address), schema completeness rating, on-chain payer activity on Base, an overall quality score, and any risk flags — all derived from a cached (≤5 min) unpaid probe of the target endpoint.
Example use cases
Vetting an unfamiliar x402 API
“I found this x402 endpoint at https://unknown-provider.xyz/v1/images and I want to know if it's legit before paying — can you check its liveness, price, payTo address, and whether it has any risk flags?”
Comparing quality scores before integrating
“Can you probe https://api.agentic-service.io/v1/search and tell me its quality score, schema completeness, and on-chain Base payer activity so I can decide if it's worth building on?”
Monitoring a paid endpoint before retrying
“My agent just hit a failure on https://data.myservice.dev/v1/prices — can you check whether that x402 endpoint is currently live and what its latency looks like right now?”
Technical details
Endpoint
GEThttps://settled.justinedwardvolmer.workers.dev/v1/check?utm_source=zero.xyzWhen to prefer
Use this endpoint any time you encounter an unfamiliar x402 endpoint and need to verify it is live, understand its cost and payment destination, and assess its trustworthiness before committing funds. Prefer it over blindly calling a paid endpoint, especially when the payTo address or price is unknown. It is also appropriate for periodic liveness checks on x402 endpoints you depend on, or for comparing quality scores across multiple candidates.
Side effects
- Target URL is not reachable or not an x402 endpoint — returns error status and no quote data
- Target endpoint returns malformed 402 headers — schema completeness is flagged as incomplete
- On-chain lookup fails for Base — payer activity field may be absent or null
- Cached result is stale (up to 5 minutes old) — liveness may not reflect instantaneous state
- URL parameter missing or not an absolute HTTPS URL — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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