curl --request POST \
  --url https://app.launchdarkly.com/api/v2/projects/{projectKey}/environments/{environmentKey}/segments/evaluate \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "address": {
    "city": "Springfield",
    "street": "123 Main Street"
  },
  "jobFunction": "doctor",
  "key": "context-key-123abc",
  "kind": "user",
  "name": "Sandy"
}
'

import requests

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

payload = {
    "address": {
        "city": "Springfield",
        "street": "123 Main Street"
    },
    "jobFunction": "doctor",
    "key": "context-key-123abc",
    "kind": "user",
    "name": "Sandy"
}
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({
    address: {city: 'Springfield', street: '123 Main Street'},
    jobFunction: 'doctor',
    key: 'context-key-123abc',
    kind: 'user',
    name: 'Sandy'
  })
};

fetch('https://app.launchdarkly.com/api/v2/projects/{projectKey}/environments/{environmentKey}/segments/evaluate', 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/{environmentKey}/segments/evaluate",
  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([
    'address' => [
        'city' => 'Springfield',
        'street' => '123 Main Street'
    ],
    'jobFunction' => 'doctor',
    'key' => 'context-key-123abc',
    'kind' => 'user',
    'name' => 'Sandy'
  ]),
  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/{environmentKey}/segments/evaluate"

	payload := strings.NewReader("{\n  \"address\": {\n    \"city\": \"Springfield\",\n    \"street\": \"123 Main Street\"\n  },\n  \"jobFunction\": \"doctor\",\n  \"key\": \"context-key-123abc\",\n  \"kind\": \"user\",\n  \"name\": \"Sandy\"\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/{environmentKey}/segments/evaluate")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"address\": {\n    \"city\": \"Springfield\",\n    \"street\": \"123 Main Street\"\n  },\n  \"jobFunction\": \"doctor\",\n  \"key\": \"context-key-123abc\",\n  \"kind\": \"user\",\n  \"name\": \"Sandy\"\n}")
  .asString();

require 'uri'
require 'net/http'

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

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  \"address\": {\n    \"city\": \"Springfield\",\n    \"street\": \"123 Main Street\"\n  },\n  \"jobFunction\": \"doctor\",\n  \"key\": \"context-key-123abc\",\n  \"kind\": \"user\",\n  \"name\": \"Sandy\"\n}"

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

{
  "items": [
    {
      "name": "Segment Name",
      "key": "segment-key-123abc",
      "description": "Segment description",
      "unbounded": false,
      "external": "https://amplitude.com/myCohort",
      "isMember": true,
      "isIndividuallyTargeted": true,
      "isRuleTargeted": false,
      "_links": {}
    }
  ],
  "_links": {}
}

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

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

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