---
title: "Resume A/B test"
method: POST
path: "/campaigns/{id}/ab-test/resume"
tags: ["Campaigns"]
---

# Resume A/B test

`POST /campaigns/{id}/ab-test/resume`

Resume a stopped A/B test. Automatic winner selection becomes eligible to pick this campaign again.

Available only while the campaign is in `stopped` status.

**Scopes:**
`campaigns.write`

## Path parameters

- `id` string, required

## Headers

- `Omnisend-Version` string, required

## Response `204`

A/B test resumed

## Other responses

- `400` — Request contains invalid or missing fields
- `401` — Authentication is missing or invalid
- `403` — Insufficient permissions for this operation
- `404` — Campaign not found
- `409` — Campaign status is not stopped
- `410` — API version has been retired
- `422` — Campaign is not an A/B test
- `429` — Rate limit exceeded
- `500` — Unexpected error occurred

---

[API](https://skmtc.net/omnisend/apis/events-api.md) · [All operations](https://skmtc.net/omnisend/apis/events-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/omnisend/events-api/versions/50214fbc283f/schema)