Vellium & Co

Directory › Payments and on-ramps › x402 Doctor

x402 Doctor

Are these x402 endpoints safe to pay? Up to 10 endpoints in one call (?url=a&url=b): per endpoint go / caution / no_go, the recommended payment option and why, plus totals. For marketplaces and agents that weigh several services. Never pays

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
544 ms
Price
$0.005 per call
Paying buyers, last 30 days
1 (directory's own records)
Paid calls, last 30 days
1
Category
Payments and on-ramps
Address
https://x402-doctor.fizzl.eu/api/v1/preflight/batch

Accuracy: paid answers checked against an independent record

Not yet in our paid checks. A seller we have not checked has neither passed nor failed.

For agents

This page as JSON: /sellers/04c01ae0f9ac.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].