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x402check Health Probe
x402
x402check Health Probe is a paid API for AI agents from x402check.anton-14a.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).
Probes a target x402 endpoint without paying and returns a trust/health verdict about whether it is responsive and well-formed.
Price / call$0.002
Success—
StatusUnknown
How this service works
x402 pre-pay trust/health check: probes another x402 endpoint (unpaid) and returns a verdict.
Output
A verdict object indicating whether the probed x402 endpoint is healthy, trustworthy, and well-formed — including the response status and any diagnostic signals gathered from the unpaid probe request.
Example use cases
Pre-integration sanity check on x402 API
“I'm about to integrate this x402 endpoint into my app — can you probe it first without paying to check if it's actually healthy and returning a proper 402 response?”
Vetting an unknown x402 service
“I found this x402 endpoint on a marketplace but I don't fully trust it yet — can you run a trust check on it and tell me if it looks legit before I send any money?”
Monitoring fleet of x402 endpoints
“Can you run a health probe on this x402 endpoint and report back whether it's up and responding correctly — I want to know before my agent tries to pay and call it?”
Technical details
Endpoint
POSThttps://x402check.anton-14a.workers.dev/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify an x402 endpoint's health, trust, or conformance before committing a payment — especially when vetting unknown or third-party x402 APIs. Prefer this over calling the endpoint directly when you want a zero-cost pre-flight check.
Side effects
- Target endpoint is unreachable or times out — probe returns unhealthy verdict
- Target URL is not an x402 endpoint — may return malformed or unexpected response verdict
- Invalid or missing target URL in request body — returns validation error
- Target endpoint returns an unexpected non-402 status — flagged in verdict
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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