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AI Structured Output Validation

AI Structured Output Validation: Validate a JSON value against a documented schema subset: types, properties, required, items, enums and size/number limits. No external references or regex execution. Local processing. Limits and retention:

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
128 ms
Price
$0.010 per call
Paying buyers, last 30 days
2 (directory's own records)
Paid calls, last 30 days
2
Category
Developer tools and utilities
Address
https://market.datapackvibe.com/x402/ai-output-validation

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/0af62f4db4e3.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].