---
title: "Get a cycler's open service event, if any"
method: GET
path: "/cyclers/{cycler_id}/service_events/open"
tags: ["Cyclers"]
---

# Get a cycler's open service event, if any

`GET /cyclers/{cycler_id}/service_events/open`

Return the cycler's current service, or ``null`` when it is in service.

A dedicated read rather than making the caller scan the history: that list is
ordered newest-created first and paginated, so an event recorded after the
fact sorts ahead of an older open one and would eventually hide it — the
cycler would read as in service while it is out. At most one open event can
exist, so this is exact.

## Path parameters

- `cycler_id` string, required

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/ionworks/apis/fastapi.md) · [All operations](https://skmtc.dev/ionworks/apis/fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ionworks/fastapi/revisions/7337a3cbdaf2/schema)