---
title: "Reboot a single instance within a virtual machine rental"
method: POST
path: "/v2/alpha/on-demand/virtual-machine-rentals/reboot-instance"
---

# Reboot a single instance within a virtual machine rental

`POST /v2/alpha/on-demand/virtual-machine-rentals/reboot-instance`

Requests an in-place guest reboot of one instance (node) of a virtual machine rental. Tenant data is preserved. Only supported for forge-backed rentals.

## Request body

- object
  - `rentalId` number, required
  - `instanceRef` string, required

## Response `200`

Successful response

- object
  - `message` string, required
  - `rentalId` number, required
  - `instanceRef` string, required

## Other responses

- `400` — Invalid input data
- `401` — Authorization not provided
- `403` — Insufficient access
- `500` — Internal server error

## Changes

- **2026-08-28** `6831853d7362` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/hyperbolic/apis/castle-api/changes/v2/alpha/on-demand/virtual-machine-rentals/reboot-instance/post.md)

---

[API](https://skmtc.dev/hyperbolic/apis/castle-api.md) · [All operations](https://skmtc.dev/hyperbolic/apis/castle-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/hyperbolic/castle-api/revisions/6831853d7362/schema)