---
title: "Start Campaign"
method: POST
path: "/campaigns/{campaign_id}/start"
tags: ["campaigns"]
---

# Start Campaign

`POST /campaigns/{campaign_id}/start`

Activate a draft campaign and queue its first sends.

## Path parameters

- `campaign_id` string, required

## Response `200`

Successful Response

- StartCampaignResponse
  - `campaign_id` string, required
  - `status` string, required
  - `total_customers` integer, required

## Other responses

- `404` — Not found
- `422` — Validation Error

## Changes

- **2026-09-02** `d96feef8e2ef` — 1 breaking
  - removed the request body

[Change history](https://skmtc.dev/noso/apis/crucible-backend-api/changes/campaigns/:campaign_id/start/post.md)

---

[API](https://skmtc.dev/noso/apis/crucible-backend-api.md) · [All operations](https://skmtc.dev/noso/apis/crucible-backend-api/llms.txt) · [OpenAPI document](https://skmtc.dev/noso/apis/crucible-backend-api/revisions/d1993647e543?raw)