---
title: "Update Experiment"
method: PATCH
path: "/workspaces/{workspace_id}/experiments/{experiment_id}"
tags: ["experiments"]
---

# Update Experiment

`PATCH /workspaces/{workspace_id}/experiments/{experiment_id}`

## Path parameters

- `experiment_id` string, uuid, required
- `workspace_id` string, uuid, required

## Request body

- CreateExperimentRequest
  - `population_id` string, uuid, required
  - `name` string, required
  - `variants` ExperimentVariantInput[], required
    - `label` string, required
    - `color` string, nullable
    - `headline` string, nullable
    - `attachments` AssetAttachmentInput[]
      - `asset_id` string, uuid, required
      - `title` string, nullable
  - `category` 'creatives' | 'messaging' | 'products' | 'websites', required
  - `context` string, nullable
  - `demographic_filter` object, nullable
  - `flow` ExperimentFlowInput
    - `nodes` ExperimentFlowNodeInput[], required
      - `id` string, required
      - `name` string, required
      - `position` ExperimentFlowPositionInput, required
        - `x` number, required
        - `y` number, required
      - `isStart` boolean
      - `isEnd` boolean
      - `attachment` AssetAttachmentInput — Durable workspace-media reference supplied by browser or MCP clients.
        - `asset_id` string, uuid, required
        - `title` string, nullable
    - `edges` ExperimentFlowEdgeInput[], required
      - `id` string, required
      - `source` string, required
      - `target` string, required
      - `variant` 'shared' | 'A' | 'B', required

## Response `200`

Successful Response

- UpdateExperimentResponse
  - `status` 'draft', required
  - `experiment_id` string, uuid, required
  - `answer` string, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/useauxos/apis/auxos.md) · [All operations](https://skmtc.dev/useauxos/apis/auxos/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/useauxos/auxos/revisions/2f853c0b59f4/schema)