Partially update a single constant

POST

constants

{key}

cURL

curl -X POST 'https://api.growthbook.io/api/v1/constants/config-snippet' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"value":"{\"timeout\":60}"}'

import requests

url = "https://api.growthbook.io/api/v1/constants/{key}"

payload = {
    "name": "<string>",
    "value": "<string>",
    "environmentValues": {},
    "description": "<string>",
    "project": "<string>",
    "owner": "<string>",
    "bypassApproval": True,
    "ignoreWarnings": True,
    "skipSchemaValidation": True,
    "skipHooks": True
}
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>',
    value: '<string>',
    environmentValues: {},
    description: '<string>',
    project: '<string>',
    owner: '<string>',
    bypassApproval: true,
    ignoreWarnings: true,
    skipSchemaValidation: true,
    skipHooks: true
  })
};

fetch('https://api.growthbook.io/api/v1/constants/{key}', 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/constants/{key}",
  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>',
    'value' => '<string>',
    'environmentValues' => [
        
    ],
    'description' => '<string>',
    'project' => '<string>',
    'owner' => '<string>',
    'bypassApproval' => true,
    'ignoreWarnings' => true,
    'skipSchemaValidation' => true,
    'skipHooks' => true
  ]),
  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/constants/{key}"

	payload := strings.NewReader("{\n  \"name\": \"<string>\",\n  \"value\": \"<string>\",\n  \"environmentValues\": {},\n  \"description\": \"<string>\",\n  \"project\": \"<string>\",\n  \"owner\": \"<string>\",\n  \"bypassApproval\": true,\n  \"ignoreWarnings\": true,\n  \"skipSchemaValidation\": true,\n  \"skipHooks\": true\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/constants/{key}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"<string>\",\n  \"value\": \"<string>\",\n  \"environmentValues\": {},\n  \"description\": \"<string>\",\n  \"project\": \"<string>\",\n  \"owner\": \"<string>\",\n  \"bypassApproval\": true,\n  \"ignoreWarnings\": true,\n  \"skipSchemaValidation\": true,\n  \"skipHooks\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.growthbook.io/api/v1/constants/{key}")

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  \"value\": \"<string>\",\n  \"environmentValues\": {},\n  \"description\": \"<string>\",\n  \"project\": \"<string>\",\n  \"owner\": \"<string>\",\n  \"bypassApproval\": true,\n  \"ignoreWarnings\": true,\n  \"skipSchemaValidation\": true,\n  \"skipHooks\": true\n}"

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

{
  "constant": {
    "id": "<string>",
    "key": "<string>",
    "name": "<string>",
    "type": "string",
    "dateCreated": "2023-11-07T05:31:56Z",
    "dateUpdated": "2023-11-07T05:31:56Z",
    "owner": "<string>",
    "ownerEmail": "<string>",
    "value": "<string>",
    "environmentValues": {},
    "description": "<string>",
    "project": "<string>",
    "archived": true
  },
  "bypassedGates": [
    {
      "type": "<string>",
      "outcome": "bypassed",
      "via": "ignoreWarnings"
    }
  ]
}

Authorizations

Authorization

string

header

required

If using Bearer auth, pass the Secret Key as the token:

curl https://api.growthbook.io/api/v1/features   -H "Authorization: Bearer secret_abc123DEF456"

Path Parameters

key

string

required

The key of the constant

Body

application/json

name

string

value

string

environmentValues

object

Per-environment value overrides (environment id → value). When provided, this REPLACES the entire override map — send the complete set, not just the environments you want to change (omit the field to leave overrides unchanged).

Show child attributes

description

string

Maximum string length: 10000

project

string

owner

string

The userId or email address of the owner. If an email address is provided, it will be used to look up the userId of the matching organization member. If an ID is provided, it will be validated as existing in the organization.

bypassApproval

boolean

Set to true to write directly to the live Constant without approval. The caller must have Bypass draft approvals access in the Constant's Project, unless the organization enables the REST API approval bypass. This field has no effect when approval is not required.

ignoreWarnings

boolean

Set to true to acknowledge the warnings listed in a blocked response and continue. This covers experiment guards, locked dependents, and references affected by an archive. When the organization treats schema failures as warnings, it also covers schema and invariant warnings. It never bypasses a rejected Custom Hook. On revision publish endpoints, it can also force-publish an out-of-date draft when the caller has Bypass draft approvals access.

skipSchemaValidation

boolean

Set to true to publish despite schema validation errors, failed invariants, or schema changes that invalidate dependent resources. This does not bypass a rejected Custom Hook; use skipHooks for that. The caller must have Bypass draft approvals access for Feature Flags, Configs, and Constants in every Project. Otherwise, this field is ignored.

skipHooks

boolean

Set to true to publish despite a Custom Hook rejection. This does not bypass schema validation; use skipSchemaValidation for that. The caller must have Bypass draft approvals access for Feature Flags, Configs, and Constants in every Project. Otherwise, this field is ignored.

Response

200 - application/json

Resource created

constant

object

required

Show child attributes

bypassedGates

object[]

Gates that would have blocked this publish but were bypassed by the caller's authority. Present only when at least one gate was bypassed.

Show child attributes

cURL

curl -X POST 'https://api.growthbook.io/api/v1/constants/config-snippet' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"value":"{\"timeout\":60}"}'

import requests

url = "https://api.growthbook.io/api/v1/constants/{key}"

payload = {
    "name": "<string>",
    "value": "<string>",
    "environmentValues": {},
    "description": "<string>",
    "project": "<string>",
    "owner": "<string>",
    "bypassApproval": True,
    "ignoreWarnings": True,
    "skipSchemaValidation": True,
    "skipHooks": True
}
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>',
    value: '<string>',
    environmentValues: {},
    description: '<string>',
    project: '<string>',
    owner: '<string>',
    bypassApproval: true,
    ignoreWarnings: true,
    skipSchemaValidation: true,
    skipHooks: true
  })
};

fetch('https://api.growthbook.io/api/v1/constants/{key}', 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/constants/{key}",
  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>',
    'value' => '<string>',
    'environmentValues' => [
        
    ],
    'description' => '<string>',
    'project' => '<string>',
    'owner' => '<string>',
    'bypassApproval' => true,
    'ignoreWarnings' => true,
    'skipSchemaValidation' => true,
    'skipHooks' => true
  ]),
  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/constants/{key}"

	payload := strings.NewReader("{\n  \"name\": \"<string>\",\n  \"value\": \"<string>\",\n  \"environmentValues\": {},\n  \"description\": \"<string>\",\n  \"project\": \"<string>\",\n  \"owner\": \"<string>\",\n  \"bypassApproval\": true,\n  \"ignoreWarnings\": true,\n  \"skipSchemaValidation\": true,\n  \"skipHooks\": true\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/constants/{key}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"<string>\",\n  \"value\": \"<string>\",\n  \"environmentValues\": {},\n  \"description\": \"<string>\",\n  \"project\": \"<string>\",\n  \"owner\": \"<string>\",\n  \"bypassApproval\": true,\n  \"ignoreWarnings\": true,\n  \"skipSchemaValidation\": true,\n  \"skipHooks\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.growthbook.io/api/v1/constants/{key}")

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  \"value\": \"<string>\",\n  \"environmentValues\": {},\n  \"description\": \"<string>\",\n  \"project\": \"<string>\",\n  \"owner\": \"<string>\",\n  \"bypassApproval\": true,\n  \"ignoreWarnings\": true,\n  \"skipSchemaValidation\": true,\n  \"skipHooks\": true\n}"

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

{
  "constant": {
    "id": "<string>",
    "key": "<string>",
    "name": "<string>",
    "type": "string",
    "dateCreated": "2023-11-07T05:31:56Z",
    "dateUpdated": "2023-11-07T05:31:56Z",
    "owner": "<string>",
    "ownerEmail": "<string>",
    "value": "<string>",
    "environmentValues": {},
    "description": "<string>",
    "project": "<string>",
    "archived": true
  },
  "bypassedGates": [
    {
      "type": "<string>",
      "outcome": "bypassed",
      "via": "ignoreWarnings"
    }
  ]
}

Introduction

Endpoints

Models

Authorizations

Path Parameters

Body

Response