I am the technical lead for a product that we hope to integrate to Splunk instances using webhooks.  As an intermediary step we use Azure Event Grid and communicate events via the Cloud Events standard protocol.  To set up webhooks requires a handshake described here: https://learn.microsoft.com/en-us/azure/event-grid/end-point-validation-cloud-events-schema (the page is from Microsoft but the handshake protocol is actually defined by the Cloud Events consortium), What I need to know is whether Splunk can accept connections out of the box or whether it requires an intermediary plug-in.  We are aware that Splunk requires an authorization header with each message. ... View more