Genesys Cloud Messaging Webhook 500 on JSON Payload via Terraform

Looking for advice on configuring messaging webhooks via Terraform in apac-1. The genesyscloud_outbound_campaign resource applies successfully, but the associated webhook fails validation during runtime. The error occurs when Genesys Cloud attempts to POST to our internal endpoint. The payload is valid JSON, yet the platform returns a 500 Internal Server Error. This suggests a schema mismatch or a hidden validation rule in the CX as Code provider. The environment is Ubuntu 22.04 LTS running in GitHub Actions. Terraform version is 1.8.1 with genesyscloud provider 1.16.2. The webhook URL is HTTPS with a valid certificate. The issue is isolated to the messaging channel. Voice webhooks work fine. The error log shows:

Error: error updating webhook: 500 Internal Server Error
Payload: {"type": "message", "content": {"text": "test"}}

The HCL configuration is minimal. No custom headers are set. The internal endpoint logs show no incoming traffic. This indicates the request fails before reaching our server. The provider documentation mentions a security_settings block, but it is optional. Omitting it causes the 500 error. Adding it with default values does not help. The problem persists across dev and staging environments. Production is unaffected because we use manual configuration there. The goal is to automate this via CI/CD. The current block prevents full automation. The team needs a workaround or a fix for the provider. The issue blocks deployment pipelines. Any insight into the expected JSON schema for messaging webhooks in this provider version would be appreciated. The standard API docs do not specify the exact structure required by the Terraform provider.

The configuration snippet is below. It applies without error, but the webhook remains inactive. The genesyscloud_messaging_integration resource is linked correctly. The webhook_url is correct. The event_type is set to MESSAGE. The security_settings block is empty. The error occurs on terraform apply. The plan shows no changes. The state file is clean. The issue is reproducible. The team has tested with different endpoints. The result is the same. The 500 error is generic. It provides no details. The logs in Genesys Cloud are silent. This makes debugging difficult. The provider version is up to date. The Terraform version is stable. The issue is specific to messaging. Other channels work. The team suspects a bug in the provider. A ticket has been filed. We are seeking community input. Has anyone successfully configured messaging webhooks via Terraform? What is the correct structure? What fields are required? The documentation is sparse. The error is unhelpful. We need a working example. The current setup fails validation. The webhook is not triggered. The integration is broken. The team is stuck. Please share your experience. Any help is welcome. The timezone is Sydney. The region is apac-1. The environment is consistent. The issue is persistent. We need a solution.

The documentation actually says webhook validation errors often stem from missing content-type headers rather than payload syntax.

headers = {
 "Content-Type" = "application/json"
}

Verify that the Terraform provider explicitly sets this header to ensure the external system parses the JSON correctly.

This happens because the webhook endpoint rejecting the request before processing the body. The error log usually shows:

HTTP 500 Internal Server Error: Connection reset by peer

Ensure the endpoint accepts application/json and returns a 200 OK immediately upon receipt.

The problem here is SIP registration timeout masking the actual webhook failure. Regional latency in apac-1 often causes carrier failover logic to trigger prematurely.

Verify outbound routing rules align with your BYOC trunk configuration. The 500 error likely stems from carrier-specific quirks rejecting the payload before validation completes.

To fix this easily, this is to stop assuming a 500 error comes from Genesys Cloud validation logic. In my experience integrating ServiceNow with GC via webhooks, a 500 almost always means the receiving endpoint crashed or your firewall dropped the connection before returning a proper 2xx status. Genesys requires an immediate 200-299 response to acknowledge receipt. If your endpoint is doing heavy processing synchronously, it times out and sends a 500 or resets the connection.

Ensure your endpoint returns 200 OK immediately, then process the JSON payload asynchronously. Also, verify the Content-Type header is explicitly set in the Terraform resource, as suggested above. Missing headers can cause the GC outbound engine to misinterpret the response.

Check your server logs for “Connection reset by peer”. This usually indicates the endpoint closed the socket prematurely.