Anyone know why the ServiceNow MID Server returns a 403 Forbidden error when processing the Genesys Cloud webhook payload for digital channel transcript ingestion?
The integration worked fine until the v24.1 update, and the payload structure matches the ServiceNow REST API documentation exactly.
This is actually a known issue… The 403 Forbidden error after the v24.1 update is rarely about the payload structure itself. It usually relates to the authentication header handling or the SNI (Server Name Indication) configuration on the MID Server.
Genesys Cloud’s new outbound proxy settings require explicit TLS 1.2/1.3 support. If the MID Server is using an older Java truststore, the handshake fails before the payload is even parsed, resulting in a 403.
Check the sys_properties table for glide.communicator.httpclient.tls.protocols. Ensure TLSv1.2 and TLSv1.3 are enabled. Also, verify that the MID Server’s hostname property matches the certificate CN/SAN exactly. Mismatches here cause immediate rejection.
Note: Always validate the webhook signature in ServiceNow. If the timestamp drift exceeds 5 minutes, the platform rejects the request as a potential replay attack. Check your server NTP sync.
If I remember right, the v24.1 release tightened webhook validation significantly, particularly around custom header injection and signature verification. While the TLS handshake issue mentioned above is valid for older MID servers, many partners are hitting 403s because Genesys now expects the X-Genesys-Webhook-Signature header to be explicitly whitelisted in the ServiceNow MID server’s allowed headers configuration. If this header is blocked by the firewall or proxy before reaching the MID, the request fails with a 403.
Additionally, ensure the payload includes the correct Content-Type header. The platform API often drops requests if the media type is ambiguous. Here is the corrected payload structure that should bypass the new security checks:
{
"Content-Type": "application/json",
"X-Genesys-Webhook-Signature": "{{signature}}",
"body": {
"transcript": "example",
"timestamp": "2024-01-01T00:00:00Z"
}
}
Verify the MID server’s sys_property for glide.communicator.httpclient.proxy.host matches the new Genesys outbound proxy requirements.