curl --request POST \
  --url https://app.launchdarkly.com/api/v2/projects/{projectKey}/environments \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "color": "DADBEE",
  "key": "environment-key-123abc",
  "name": "My Environment"
}
'

import requests

url = "https://app.launchdarkly.com/api/v2/projects/{projectKey}/environments"

payload = {
    "color": "DADBEE",
    "key": "environment-key-123abc",
    "name": "My Environment"
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({color: 'DADBEE', key: 'environment-key-123abc', name: 'My Environment'})
};

fetch('https://app.launchdarkly.com/api/v2/projects/{projectKey}/environments', 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://app.launchdarkly.com/api/v2/projects/{projectKey}/environments",
  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([
    'color' => 'DADBEE',
    'key' => 'environment-key-123abc',
    'name' => 'My Environment'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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://app.launchdarkly.com/api/v2/projects/{projectKey}/environments"

	payload := strings.NewReader("{\n  \"color\": \"DADBEE\",\n  \"key\": \"environment-key-123abc\",\n  \"name\": \"My Environment\"\n}")

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

	req.Header.Add("Authorization", "<api-key>")
	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://app.launchdarkly.com/api/v2/projects/{projectKey}/environments")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"color\": \"DADBEE\",\n  \"key\": \"environment-key-123abc\",\n  \"name\": \"My Environment\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.launchdarkly.com/api/v2/projects/{projectKey}/environments")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"color\": \"DADBEE\",\n  \"key\": \"environment-key-123abc\",\n  \"name\": \"My Environment\"\n}"

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

{
  "_links": {
    "self": {
      "href": "/api/v2/projects/my-project/environments/my-environment",
      "type": "application/json"
    }
  },
  "_id": "57be1db38b75bf0772d11384",
  "key": "environment-key-123abc",
  "name": "My Environment",
  "apiKey": "sdk-xxx",
  "mobileKey": "mob-xxx",
  "color": "F5A623",
  "defaultTtl": 5,
  "secureMode": true,
  "defaultTrackEvents": false,
  "requireComments": true,
  "confirmChanges": true,
  "tags": [
    "ops"
  ],
  "critical": true,
  "_access": {
    "denied": [
      {
        "action": "<string>",
        "reason": {
          "effect": "allow",
          "resources": [
            "proj/*:env/*;qa_*:/flag/*"
          ],
          "notResources": [
            "<string>"
          ],
          "actions": [
            "*"
          ],
          "notActions": [
            "<string>"
          ],
          "role_name": "<string>"
        }
      }
    ],
    "allowed": [
      {
        "action": "<string>",
        "reason": {
          "effect": "allow",
          "resources": [
            "proj/*:env/*;qa_*:/flag/*"
          ],
          "notResources": [
            "<string>"
          ],
          "actions": [
            "*"
          ],
          "notActions": [
            "<string>"
          ],
          "role_name": "<string>"
        }
      }
    ]
  },
  "approvalSettings": {
    "required": true,
    "bypassApprovalsForPendingChanges": false,
    "minNumApprovals": 1,
    "canReviewOwnRequest": false,
    "canApplyDeclinedChanges": true,
    "serviceKind": "launchdarkly",
    "serviceConfig": {},
    "requiredApprovalTags": [
      "require-approval"
    ],
    "autoApplyApprovedChanges": true,
    "serviceKindConfigurationId": "1ef45a85-218f-4428-a8b2-a97e5f56c258"
  },
  "resourceApprovalSettings": {}
}

{
  "code": "invalid_request",
  "message": "Invalid request body"
}

{
  "code": "unauthorized",
  "message": "Invalid access token"
}

{
  "code": "forbidden",
  "message": "Forbidden. Access to the requested resource was denied."
}

{
  "code": "not_found",
  "message": "Invalid resource identifier"
}

{
  "code": "optimistic_locking_error",
  "message": "Conflict. Optimistic lock error. Try again later."
}

{
  "code": "rate_limited",
  "message": "You've exceeded the API rate limit. Try again later."
}