---
type: "operation"
title: "Subscription $events"
resource: "Subscription"
operation: "events"
---
# subscription $events

Search and retrieve prior events for a Subscription

**Description:** This operation is used to search for and return notifications that have been previously triggered by a topic-based Subscription.

**Affects State:** false

**System:** false

**Type:** false

**Instance:** true

**URL:** http://hl7.org/fhir/build/OperationDefinition/Subscription-events


## Parameters

- **eventsSinceNumber** [in] 0..1 integer64 — The lowest event number to be included in the response (lower bound, inclusive).
- **eventsUntilNumber** [in] 0..1 integer64 — The highest event number to be included in the response (upper bound, inclusive).
- **content** [in] 0..1 code — Requested content style of returned data. Codes from backport-content-value-set (e.g., empty, id-only, full-resource). This is a hint to the server what a client would prefer, and MAY be ignored.
- **return** [out] 1..1 Bundle — The operation returns a valid notification bundle, with the first entry being a SubscriptionStatus resource. The bundle type is "subscription-notification".