---
title: "Start or stop a sending warm-up"
method: POST
path: "/domains/{id}/warmup"
---

# Start or stop a sending warm-up

`POST /domains/{id}/warmup`

## Request

- Base URL: `https://worker.openhelm.ai/v1`
- URL: `https://worker.openhelm.ai/v1/domains/{id}/warmup`
- Auth: HTTP bearer

A brand-new domain sending at full volume gets throttled by the receiving side, and the damage outlives the campaign. Starting a warm-up caps daily volume on a rising schedule derived from the elapsed days, never stored. Transactional mail is exempt: a password reset is not volume the sender chose. An established domain being migrated should not ramp at all.

## Path parameters

- `id` string, required

## Request body

- object
  - `start` boolean, required

## Response `200`

OK

---

[API](https://skmtc.dev/openhelm/apis/openhelm-public-api.md) · [All operations](https://skmtc.dev/openhelm/apis/openhelm-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/openhelm/apis/openhelm-public-api/revisions/2af88dc2f6a7?raw)