---
title: "Update"
method: PATCH
path: "/companies/{company_id}/experiments/{experiment_id}"
tags: ["experiments"]
---

# Update

`PATCH /companies/{company_id}/experiments/{experiment_id}`

## Request

- Base URL: `https://app.zalster.com` (the document declares no server; this is the origin it was published from)
- URL: `https://app.zalster.com/companies/{company_id}/experiments/{experiment_id}`
- Auth: none declared

Rename, or move between draft → running → completed.

Starting an experiment queues a render run for its variants so the
supplementary feed has every arm's creative before it publishes.

## Path parameters

- `company_id` string, uuid, required: Company id
- `experiment_id` string, uuid, required

## Request body

- ExperimentUpdate
  - `name` string, nullable
  - `status` 'draft' | 'running' | 'completed'
  - `hypothesis` string, nullable

## Response `200`

Successful Response

- ExperimentOut
  - `id` string, uuid, required
  - `template_id` string, uuid, required
  - `name` string, required
  - `status` string, required
  - `variants` unknown[], required
    - unknown
  - `format` string, required
  - `hypothesis` string, nullable, required
  - `started_at` string, date-time, nullable, required
  - `ended_at` string, date-time, nullable, required
  - `created_at` string, date-time, required
  - `updated_at` string, date-time, required
  - `assignments` object, nullable

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/zalster/apis/zalster-feed-processor.md) - [All operations](https://skmtc.dev/zalster/apis/zalster-feed-processor/llms.txt) - [OpenAPI document](https://skmtc.dev/zalster/apis/zalster-feed-processor/revisions/d0b9dc66ad36?raw)