---
title: "Create a new experiment"
method: POST
path: "/v1/admin/experiments"
tags: ["Admin Experiments"]
---

# Create a new experiment

`POST /v1/admin/experiments`

## Request body

- CreateExperimentDto
  - `key` string, required — Stable, lower_snake_case key.
  - `name` string, required
  - `description` string, nullable
  - `status` 'draft' | 'running' | 'paused' | 'completed'
  - `enrollmentMode` 'auto' | 'manual'
  - `variants` ExperimentVariantDto[], required
    - `id` string, required
    - `weight` number, required
  - `defaultVariantId` string, nullable
  - `seed` string — Optional explicit seed. Defaults to a random uuid.

## Response `201`

- ExperimentDto
  - `id` string, required
  - `key` string, required
  - `name` string, required
  - `description` string, nullable
  - `status` 'draft' | 'running' | 'paused' | 'completed', required
  - `enrollmentMode` 'auto' | 'manual', required
  - `variants` ExperimentVariantDto[], required
    - `id` string, required
    - `weight` number, required
  - `defaultVariantId` string, nullable
  - `forcedVariantId` string, nullable
  - `winnerVariantId` string, nullable
  - `completedAt` string, date-time, nullable
  - `seed` string, required
  - `subjectType` 'firebase_uid', required
  - `createdAt` string, date-time, required
  - `updatedAt` string, date-time, required

---

[API](https://skmtc.dev/miaai/apis/backend-template-api.md) · [All operations](https://skmtc.dev/miaai/apis/backend-template-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/miaai/backend-template-api/revisions/2a8d88a5124f/schema)