Vellium & Co

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api.provenpaid.com

Call before paying an unfamiliar x402 endpoint to check that it is real and actually gets paid. Pass ?url=<endpoint URL>. ProvenPaid probes the endpoint without paying, validates its x402 challenge (v1/v2; MPP detected) and reads public Bas

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
213 ms
Price
$0.010 per call
Paying buyers, last 30 days
1 (directory's own records)
Paid calls, last 30 days
2
Category
Payments and on-ramps
Address
https://api.provenpaid.com/v1/check

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/85fec203c7c6.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].