Start the Holdout's Active Period

curl -X POST 'https://api.growthbook.io/api/v1/holdouts/{id}/start' \
  -H 'Authorization: Bearer YOUR_API_KEY'

import requests

url = "https://api.growthbook.io/api/v1/holdouts/{id}/start"

headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, headers=headers)

print(response.text)

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.growthbook.io/api/v1/holdouts/{id}/start', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.growthbook.io/api/v1/holdouts/{id}/start",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.growthbook.io/api/v1/holdouts/{id}/start"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.growthbook.io/api/v1/holdouts/{id}/start")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.growthbook.io/api/v1/holdouts/{id}/start")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body

{
  "holdout": {
    "id": "<string>",
    "dateCreated": "2023-11-07T05:31:56Z",
    "dateUpdated": "2023-11-07T05:31:56Z",
    "name": "<string>",
    "description": "<string>",
    "projects": [
      "<string>"
    ],
    "owner": "<string>",
    "tags": [
      "<string>"
    ],
    "archived": true,
    "stage": "draft",
    "trackingKey": "<string>",
    "experimentId": "<string>",
    "skipAsDefaultHoldout": true,
    "holdoutSize": -0.5,
    "hashAttribute": "<string>",
    "targetingCondition": "<string>",
    "datasourceId": "<string>",
    "assignmentQueryId": "<string>",
    "goalMetrics": [
      "<string>"
    ],
    "secondaryMetrics": [
      "<string>"
    ],
    "variations": [
      {
        "variationId": "<string>",
        "key": "<string>",
        "name": "<string>",
        "description": "<string>"
      }
    ],
    "environments": {},
    "linkedFeatures": [
      {
        "id": "<string>",
        "dateAdded": "2023-11-07T05:31:56Z"
      }
    ],
    "linkedExperiments": [
      {
        "id": "<string>",
        "dateAdded": "2023-11-07T05:31:56Z"
      }
    ],
    "ownerEmail": "<string>",
    "savedGroupTargeting": [
      {
        "match": "all",
        "ids": [
          "<string>"
        ]
      }
    ],
    "statsEngine": "bayesian",
    "dateStarted": "2023-11-07T05:31:56Z",
    "analysisStartDate": "2023-11-07T05:31:56Z",
    "dateStopped": "2023-11-07T05:31:56Z",
    "statusUpdateSchedule": {
      "startAt": "2023-11-07T05:31:56Z",
      "startAnalysisPeriodAt": "2023-11-07T05:31:56Z",
      "stopAt": "2023-11-07T05:31:56Z"
    },
    "nextScheduledStatusUpdate": {
      "type": "start",
      "date": "2023-11-07T05:31:56Z"
    }
  }
}

{
  "message": "<string>",
  "code": "invalid_status",
  "details": {
    "currentStatus": "<string>",
    "expectedStatuses": [
      "<string>"
    ]
  }
}