Vellium & Co

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hash-hmac

Compute an HMAC (MD5, SHA-1, SHA-256 or SHA-512) of text with a given key.

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
70 ms
Price
$0.002 per call
Paying buyers, last 30 days
3 (directory's own records)
Paid calls, last 30 days
3
Category
Developer tools and utilities
Address
https://x402.agentindex.world/hash/hmac

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/7252723b5a40.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].