---
title: "Cancel Sandbox Operation"
method: POST
path: "/sandboxes/{sandbox_id}/cancel"
---

# Cancel Sandbox Operation

`POST /sandboxes/{sandbox_id}/cancel`

Stop an in-flight operation by deleting its session VM.

## Path parameters

- `sandbox_id` string, required

## Response `204`

Successful Response

## Other responses

- `422` — Validation Error

## Changes

- **2026-09-12** `445e7248bf04` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/celestoai/apis/smolvm/changes/sandboxes/:sandbox_id/cancel/post.md)

---

[API](https://skmtc.dev/celestoai/apis/smolvm.md) · [All operations](https://skmtc.dev/celestoai/apis/smolvm/llms.txt) · [OpenAPI document](https://skmtc.dev/celestoai/apis/smolvm/revisions/4d88cab246b2?raw)