Create a single holdout

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

import requests

url = "https://api.growthbook.io/api/v1/holdouts"

payload = {
    "name": "<string>",
    "description": "<string>",
    "projects": ["<string>"],
    "owner": "<string>",
    "tags": ["<string>"],
    "skipAsDefaultHoldout": True,
    "holdoutSize": -0.5,
    "hashAttribute": "<string>",
    "targetingCondition": "<string>",
    "savedGroupTargeting": [{ "ids": ["<string>"] }],
    "datasourceId": "<string>",
    "assignmentQueryId": "<string>",
    "goalMetrics": ["<string>"],
    "secondaryMetrics": ["<string>"],
    "environments": {},
    "statusUpdateSchedule": {
        "startAt": "2023-11-07T05:31:56Z",
        "startAnalysisPeriodAt": "2023-11-07T05:31:56Z",
        "stopAt": "2023-11-07T05:31:56Z"
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: '<string>',
    description: '<string>',
    projects: ['<string>'],
    owner: '<string>',
    tags: ['<string>'],
    skipAsDefaultHoldout: true,
    holdoutSize: -0.5,
    hashAttribute: '<string>',
    targetingCondition: '<string>',
    savedGroupTargeting: [{ids: ['<string>']}],
    datasourceId: '<string>',
    assignmentQueryId: '<string>',
    goalMetrics: ['<string>'],
    secondaryMetrics: ['<string>'],
    environments: {},
    statusUpdateSchedule: {
      startAt: '2023-11-07T05:31:56Z',
      startAnalysisPeriodAt: '2023-11-07T05:31:56Z',
      stopAt: '2023-11-07T05:31:56Z'
    }
  })
};

fetch('https://api.growthbook.io/api/v1/holdouts', 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",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'name' => '<string>',
    'description' => '<string>',
    'projects' => [
        '<string>'
    ],
    'owner' => '<string>',
    'tags' => [
        '<string>'
    ],
    'skipAsDefaultHoldout' => true,
    'holdoutSize' => -0.5,
    'hashAttribute' => '<string>',
    'targetingCondition' => '<string>',
    'savedGroupTargeting' => [
        [
                'ids' => [
                                '<string>'
                ]
        ]
    ],
    'datasourceId' => '<string>',
    'assignmentQueryId' => '<string>',
    'goalMetrics' => [
        '<string>'
    ],
    'secondaryMetrics' => [
        '<string>'
    ],
    'environments' => [
        
    ],
    'statusUpdateSchedule' => [
        'startAt' => '2023-11-07T05:31:56Z',
        'startAnalysisPeriodAt' => '2023-11-07T05:31:56Z',
        'stopAt' => '2023-11-07T05:31:56Z'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.growthbook.io/api/v1/holdouts"

	payload := strings.NewReader("{\n  \"name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"projects\": [\n    \"<string>\"\n  ],\n  \"owner\": \"<string>\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"skipAsDefaultHoldout\": true,\n  \"holdoutSize\": -0.5,\n  \"hashAttribute\": \"<string>\",\n  \"targetingCondition\": \"<string>\",\n  \"savedGroupTargeting\": [\n    {\n      \"ids\": [\n        \"<string>\"\n      ]\n    }\n  ],\n  \"datasourceId\": \"<string>\",\n  \"assignmentQueryId\": \"<string>\",\n  \"goalMetrics\": [\n    \"<string>\"\n  ],\n  \"secondaryMetrics\": [\n    \"<string>\"\n  ],\n  \"environments\": {},\n  \"statusUpdateSchedule\": {\n    \"startAt\": \"2023-11-07T05:31:56Z\",\n    \"startAnalysisPeriodAt\": \"2023-11-07T05:31:56Z\",\n    \"stopAt\": \"2023-11-07T05:31:56Z\"\n  }\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	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")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"projects\": [\n    \"<string>\"\n  ],\n  \"owner\": \"<string>\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"skipAsDefaultHoldout\": true,\n  \"holdoutSize\": -0.5,\n  \"hashAttribute\": \"<string>\",\n  \"targetingCondition\": \"<string>\",\n  \"savedGroupTargeting\": [\n    {\n      \"ids\": [\n        \"<string>\"\n      ]\n    }\n  ],\n  \"datasourceId\": \"<string>\",\n  \"assignmentQueryId\": \"<string>\",\n  \"goalMetrics\": [\n    \"<string>\"\n  ],\n  \"secondaryMetrics\": [\n    \"<string>\"\n  ],\n  \"environments\": {},\n  \"statusUpdateSchedule\": {\n    \"startAt\": \"2023-11-07T05:31:56Z\",\n    \"startAnalysisPeriodAt\": \"2023-11-07T05:31:56Z\",\n    \"stopAt\": \"2023-11-07T05:31:56Z\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.growthbook.io/api/v1/holdouts")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"projects\": [\n    \"<string>\"\n  ],\n  \"owner\": \"<string>\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"skipAsDefaultHoldout\": true,\n  \"holdoutSize\": -0.5,\n  \"hashAttribute\": \"<string>\",\n  \"targetingCondition\": \"<string>\",\n  \"savedGroupTargeting\": [\n    {\n      \"ids\": [\n        \"<string>\"\n      ]\n    }\n  ],\n  \"datasourceId\": \"<string>\",\n  \"assignmentQueryId\": \"<string>\",\n  \"goalMetrics\": [\n    \"<string>\"\n  ],\n  \"secondaryMetrics\": [\n    \"<string>\"\n  ],\n  \"environments\": {},\n  \"statusUpdateSchedule\": {\n    \"startAt\": \"2023-11-07T05:31:56Z\",\n    \"startAnalysisPeriodAt\": \"2023-11-07T05:31:56Z\",\n    \"stopAt\": \"2023-11-07T05:31:56Z\"\n  }\n}"

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"
    }
  }
}