generated: '2026-08-19'
method: searched
source: https://dev.splunk.com/observability/docs/integrations/webhook_integration_overview/
surface: outbound-webhooks
note: >-
  Splunk Observability Cloud sends outbound webhooks as an ALERT NOTIFICATION channel, not as a
  general event bus. A webhook integration is created through the Integrations API
  (POST /v2/integration) and fires when a detector's notification rule targets it. There is no
  event-subscription API, no event catalogue and no replay: the "event types" are whatever your
  detectors detect.
delivery:
  transport: HTTPS POST
  target: The url property of the webhook integration object.
  custom_headers: Supported through the integration's headers property.
  management_api: openapi/splunk-observability-integrations-openapi.yml
signing:
  header: X-SFX-Signature
  algorithm: HMAC-SHA256
  encoding: base64
  key_field: sharedSecret
  applied_when: The sharedSecret property is present and non-null on the integration.
  verification: >-
    Compute the HMAC-SHA256 of the raw incoming request payload using sharedSecret as the key,
    base64-encode it, and compare to X-SFX-Signature. Splunk adds the header itself; it must not be
    set in the integration's headers property.
payload:
  templating: Handlebars-style template; a custom payload can replace the default entirely.
  default_fields:
    - severity
    - originatingMetric
    - detectOnCondition
    - detectOffCondition
    - messageBody
    - src
    - inputs
    - rule
    - description
    - messageTitle
    - sf_schema
    - eventType
    - runbookUrl
    - orgId
    - detectorId
    - imageUrl
    - tip
    - statusExtended
    - incidentId
    - detector
    - detectorUrl
    - status
    - timestamp
    - dimensions
  schema_version_field: sf_schema
  note: >-
    sf_schema is an integer schema version on the default payload (2 in Splunk's published
    example). Because the payload is user-templatable, a receiver cannot assume the default shape
    unless it also controls the integration.
asyncapi_published: false
asyncapi_note: >-
  Splunk publishes no AsyncAPI for the webhook surface. The streaming surface that IS specifiable
  is SignalFlow — see asyncapi/splunk-observability-signalflow-asyncapi.yml.
other_notification_channels:
  note: >-
    Webhook is the generic fallback. Splunk also ships first-class notification integrations
    (PagerDuty, Slack, ServiceNow, Jira, Opsgenie, VictorOps, email, Amazon EventBridge, Microsoft
    Teams and others), all created through the same Integrations API.