---
title: "Signal Machine"
method: POST
path: "/apps/{app_name}/machines/{machine_id}/signal"
tags: ["Machines"]
---

# Signal Machine

`POST /apps/{app_name}/machines/{machine_id}/signal`

Send a signal to a specific Machine within an app using the details provided in the request body.

## Path parameters

- `app_name` string, required
- `machine_id` string, required

## Request body

- SignalRequest
  - `signal` 'SIGABRT' | 'SIGALRM' | 'SIGFPE' | 'SIGHUP' | 'SIGILL' | 'SIGINT' | 'SIGKILL' | 'SIGPIPE' | 'SIGQUIT' | 'SIGSEGV' | 'SIGTERM' | 'SIGTRAP' | 'SIGUSR1' | 'SIGUSR2'

## Response `200`

OK

## Other responses

- `400` — Bad Request

---

[API](https://skmtc.dev/fly/apis/machines-api.md) · [All operations](https://skmtc.dev/fly/apis/machines-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/fly/machines-api/revisions/f5ad396d55d7/schema)