Vellium & Co

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Structured Data Tools

JSON Schema validation — validate JSON records, invoices and payloads against the bounded Draft 2020-12 Atlas profile; return valid status and deterministic JSON Pointer errors. This validator subset supports exact numbers and local referen

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
251 ms
Price
$0.010 per call
Paying buyers, last 30 days
2 (directory's own records)
Paid calls, last 30 days
2
Category
Payments and on-ramps
Address
https://data-tools.use.x402atlas.com/json-schema-validate

Accuracy

Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.

For agents

This page as JSON: /sellers/0ef7e73f2f24.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].