HMAC sign

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Compute HMAC signatures over an HTTP API. SHA-1, SHA-256, SHA-384, or SHA-512 with a shared secret. Returns the signature in hex, standard base64, and URL-safe base64 — match whichever your verifier expects.

POST /api/hmac-sign·cap 16.0 MiB·1 cost unit(s)

More Hash

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Hash bytes

Hash a text string with SHA-1 / SHA-256 / SHA-384 / SHA-512.

Hash file

Hash arbitrary file bytes with SHA-1 / SHA-256 / SHA-384 / SHA-512.

HMAC verify

Verify an HMAC signature in constant time.