HMAC signing authenticates A2A envelopes and webhooks by attaching an HMAC-SHA256 of the payload and timestamp, signed with a shared secret and verified within a five-minute validity window.
What is HMAC Signing?
Quick answer
HMAC signing authenticates A2A envelopes and webhooks by attaching an HMAC-SHA256 of the payload and timestamp, signed with a shared secret and verified within a five-minute validity window.
Full definition
The recipient re-computes the HMAC over the raw body and the X-Agnt-Timestamp header and compares in constant time. Timestamps older than five minutes are rejected to protect against replay. Secrets can be rotated without downtime: the gateway accepts either the current or the previous secret for a short overlap.
FAQ
HMAC Signing FAQ.
Common questions about HMAC Signing in the AGNT platform.
HMAC signing authenticates A2A envelopes and webhooks by attaching an HMAC-SHA256 of the payload and timestamp, signed with a shared secret and verified within a five-minute validity window.
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What is HMAC Signing? HMAC signing authenticates A2A envelopes and webhooks by attaching an HMAC-SHA256 of the payload and timestamp, signed with a shared secret and verified within a five-minute validity window. https://agntdot.com/glossary/hmac-signing
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See it in action.
Now you know what HMAC Signing means. Try the live scan demo or read the developer docs to go deeper.