Source note · What a Webex webhook guarantees
Webex supports 2 webhook signature headers: X-Spark-Signature carries an HMAC-SHA1 signature when the webhook was created with a secret, and X-Webex-Signature provides HMAC-SHA256 and HMAC-SHA512 signatures for supported webhook types, with Cisco recommending the second where it is available and naming the first as the compatibility path for webhook types that do not offer it.
Checked 2026-09-16
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- Webhooks
- Deployment
- not restricted
- Region
- not restricted
- Release range
- not restricted
- Checked
- 2026-09-16
Sources
- Webex for Developers — Webhooks — Cisco Systems, Inc. (developer.webex.com) · tier 2 current vendor documentation · Webhooks guide, Authenticating Requests section
Cite this note
APA
WarmTransfer. (2026, September 16). What a Webex webhook guarantees: source note wxwh-two-signature-headers-two-algorithms. WarmTransfer. https://warmtransfer.net/knowledge/claims/wxwh-two-signature-headers-two-algorithms
BibTeX
@misc{warmtransfer-claim-wxwh-two-signature-headers-two-algorithms,
title = {What a Webex webhook guarantees: source note wxwh-two-signature-headers-two-algorithms},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/wxwh-two-signature-headers-two-algorithms},
note = {Source note wxwh-two-signature-headers-two-algorithms, checked 2026-09-16}
}