Why Payment Webhooks Fail HMAC Signature Verification
This story is from 2026-09-20. It is preserved in the archive; the latest stories are on the live feed.
Why Payment Webhooks Fail HMAC Signature Verification When I built the payment webhook system for intent-canvas, I ran into a weird bug where HMAC signature verification silently failed. This is because express.json() middleware parses the body before hashing, capturing the mutable request body and…
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- 2026-09-20 12:08 · DEV Community — AI
Why Payment Webhooks Fail HMAC Signature Verification