Task

Message Authentication Code

1 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

hash-hmac x402 REST usage

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

x402.agentindex.world Dev & Code 3 calls / 30d checked 2026-10-26

0.002 USDC per call per call

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