curl --request POST \
  --url https://app.launchdarkly.com/api/v2/segments/{projectKey}/{environmentKey} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Example segment",
  "key": "segment-key-123abc",
  "description": "Bundle our sample customers together",
  "tags": [
    "testing"
  ],
  "unbounded": false,
  "unboundedContextKind": "device"
}
'

import requests

url = "https://app.launchdarkly.com/api/v2/segments/{projectKey}/{environmentKey}"

payload = {
    "name": "Example segment",
    "key": "segment-key-123abc",
    "description": "Bundle our sample customers together",
    "tags": ["testing"],
    "unbounded": False,
    "unboundedContextKind": "device"
}
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({
    name: 'Example segment',
    key: 'segment-key-123abc',
    description: 'Bundle our sample customers together',
    tags: ['testing'],
    unbounded: false,
    unboundedContextKind: 'device'
  })
};

fetch('https://app.launchdarkly.com/api/v2/segments/{projectKey}/{environmentKey}', 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/segments/{projectKey}/{environmentKey}",
  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' => 'Example segment',
    'key' => 'segment-key-123abc',
    'description' => 'Bundle our sample customers together',
    'tags' => [
        'testing'
    ],
    'unbounded' => false,
    'unboundedContextKind' => 'device'
  ]),
  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/segments/{projectKey}/{environmentKey}"

	payload := strings.NewReader("{\n  \"name\": \"Example segment\",\n  \"key\": \"segment-key-123abc\",\n  \"description\": \"Bundle our sample customers together\",\n  \"tags\": [\n    \"testing\"\n  ],\n  \"unbounded\": false,\n  \"unboundedContextKind\": \"device\"\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/segments/{projectKey}/{environmentKey}")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"Example segment\",\n  \"key\": \"segment-key-123abc\",\n  \"description\": \"Bundle our sample customers together\",\n  \"tags\": [\n    \"testing\"\n  ],\n  \"unbounded\": false,\n  \"unboundedContextKind\": \"device\"\n}")
  .asString();

require 'uri'
require 'net/http'

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

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  \"name\": \"Example segment\",\n  \"key\": \"segment-key-123abc\",\n  \"description\": \"Bundle our sample customers together\",\n  \"tags\": [\n    \"testing\"\n  ],\n  \"unbounded\": false,\n  \"unboundedContextKind\": \"device\"\n}"

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

{
  "name": "Example segment",
  "tags": [
    "testing"
  ],
  "creationDate": "1654104600000",
  "lastModifiedDate": "1654104600000",
  "key": "segment-key-123abc",
  "_links": {},
  "rules": [
    {
      "_id": "1234a56b7c89d012345e678f",
      "clauses": [
        {
          "_id": "12ab3c45de678910fab12345",
          "attribute": "email",
          "negate": false,
          "op": "endsWith",
          "values": [
            ".edu"
          ]
        }
      ]
    }
  ],
  "version": 1,
  "deleted": false,
  "generation": 123,
  "description": "Bundle our sample customers together",
  "included": [
    "user-key-123abc"
  ],
  "excluded": [
    "user-key-123abc"
  ],
  "includedContexts": [
    {
      "values": [
        "<string>"
      ],
      "contextKind": "<string>"
    }
  ],
  "excludedContexts": [
    {
      "values": [
        "<string>"
      ],
      "contextKind": "<string>"
    }
  ],
  "_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>"
        }
      }
    ]
  },
  "_flags": [
    {
      "name": "Example flag",
      "key": "flag-key-123abc",
      "_links": {},
      "_site": {
        "href": "<string>",
        "type": "<string>"
      }
    }
  ],
  "unbounded": false,
  "unboundedContextKind": "<string>",
  "_unboundedMetadata": {
    "envId": "<string>",
    "segmentId": "<string>",
    "version": 123,
    "includedCount": 123,
    "excludedCount": 123,
    "lastModified": 123,
    "deleted": true
  },
  "_external": "amplitude",
  "_externalLink": "https://analytics.amplitude.com/org/1234/cohort/123abc",
  "_importInProgress": false
}

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