---
title: "Force a variant — all reads return this immediately"
method: POST
path: "/v1/admin/experiments/{key}/force-variant"
tags: ["Admin Experiments"]
---

# Force a variant — all reads return this immediately

`POST /v1/admin/experiments/{key}/force-variant`

Use as a kill switch (force the safe variant) or a 100% rollout (force the winning variant).

## Path parameters

- `key` string, required

## Request body

- SetForcedVariantDto
  - `variantId` string, required — Must be one of the variant ids defined on the experiment. All reads will return this variant immediately.

## Response `200`

- 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)