---
title: "Launch a caption A/B test"
method: POST
path: "/api/experiments/{id}/launch"
---

# Launch a caption A/B test

`POST /api/experiments/{id}/launch`

## Request

- Base URL: `https://api.seenpaid.com`
- URL: `https://api.seenpaid.com/api/experiments/{id}/launch`
- Auth: one of:
  - HTTP bearer
  - OAuth 2 (authorization code, authorization URL `https://api.seenpaid.com/authorize`, token URL `https://api.seenpaid.com/token`, scopes: `posts:write`)

Schedule every variant (staggered) as a real post with its own tracked link, and start the experiment.

## Path parameters

- `id` string, uuid, required

## Response `200`

OK

- object
  - `success` true
  - `data` object

## Other responses

- `401`: Missing or invalid credential (API key or OAuth token).
- `404`: No resource with that id in the caller's org.

---

[API](https://skmtc.dev/seenpaid/apis/seenpaid-api.md) · [All operations](https://skmtc.dev/seenpaid/apis/seenpaid-api/llms.txt) · [OpenAPI document](https://skmtc.dev/seenpaid/apis/seenpaid-api/revisions/7b3f72ed82e9?raw)