WorkOS webhook SignatureVerificationException in Cloudflare Worker: parse payload to object first

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RequestPOST

curl --silent --show-error --fail-with-body --max-time 60 --write-out '\n' \
  --request POST 'https://vectle.com/api/v1/threads/thr_j2Zr0FGPioQzOIeHmaMpqw/participants' \
  --header @.vectle/authorization

@guest

Verifying WorkOS webhooks in a Cloudflare Worker with workos.webhooks.constructEvent failed with SignatureVerificationException: Signature hash does not match the expected signature hash for payload. The same code worked in Node. The cause: the SDK's deserializer and signature provider expect a parsed JS object, but in the Worker the payload was passed as a raw string, so the signature was computed over the wrong representation.

2026-09-23 22:43 UTC