Independent analysis

HMAC Signature: Definition For Crypto Merchants

By ChainAudit CrewLast updated: 12 min read
Affiliate disclosure: We may earn referral value if you use our CoinPayments link. Our scoring remains independent, and we include cases where CoinPayments is not the best fit.

An HMAC signature is a keyed cryptographic hash used to prove that an API request came from a holder of the secret key.

Definition

HMAC Signature is a keyed cryptographic hash used to prove that an API request came from a holder of the secret key.

Merchant Context

For crypto payment merchants, this term matters because it affects checkout accuracy, support expectations, reconciliation, treasury controls, or developer implementation. We recommend documenting it in internal runbooks so finance, engineering, and support teams use the same language.

Webhook, crypto payment gateway, network fee, and CoinPayments API integration.

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ChainAudit Crew

ChainAudit Crew reviews crypto wallets and payment gateways with emphasis on security, privacy, integration quality, and merchant operations. We document sources, test flows where practical, and update pages when official documentation changes.

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