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content/en/docs/reference/access-authn-authz/webhook.md

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 - deads2k
 - liggitt
 title: Webhook Mode
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 A WebHook is an HTTP callback: an HTTP POST that occurs when something happens; a simple event-notification via HTTP POST. A web application implementing WebHooks will POST a message to a URL when certain things happen.
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 When specified, mode `Webhook` causes Kubernetes to query an outside REST
 service when determining user privileges.
 
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 For further documentation refer to the authorization.v1beta1 API objects and
 [webhook.go](https://github.com/kubernetes/kubernetes/blob/{{< param "githubbranch" >}}/staging/src/k8s.io/apiserver/plugin/pkg/authorizer/webhook/webhook.go).
 
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