curl --request POST \
  --url https://your-instance.example.com/api/organizations/{organizationId}/conditional-fields \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Eligibility flag",
  "sectionId": "contact.identity",
  "expression": "contact.age >= 18 && contact.country == \"US\"",
  "status": "active",
  "outputType": "boolean",
  "description": "Set true when contact passes US adult eligibility checks",
  "type": "contact",
  "sectionType": "identity"
}
'

import requests

url = "https://your-instance.example.com/api/organizations/{organizationId}/conditional-fields"

payload = {
    "name": "Eligibility flag",
    "sectionId": "contact.identity",
    "expression": "contact.age >= 18 && contact.country == \"US\"",
    "status": "active",
    "outputType": "boolean",
    "description": "Set true when contact passes US adult eligibility checks",
    "type": "contact",
    "sectionType": "identity"
}
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: 'Eligibility flag',
    sectionId: 'contact.identity',
    expression: 'contact.age >= 18 && contact.country == "US"',
    status: 'active',
    outputType: 'boolean',
    description: 'Set true when contact passes US adult eligibility checks',
    type: 'contact',
    sectionType: 'identity'
  })
};

fetch('https://your-instance.example.com/api/organizations/{organizationId}/conditional-fields', 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://your-instance.example.com/api/organizations/{organizationId}/conditional-fields",
  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' => 'Eligibility flag',
    'sectionId' => 'contact.identity',
    'expression' => 'contact.age >= 18 && contact.country == "US"',
    'status' => 'active',
    'outputType' => 'boolean',
    'description' => 'Set true when contact passes US adult eligibility checks',
    'type' => 'contact',
    'sectionType' => 'identity'
  ]),
  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://your-instance.example.com/api/organizations/{organizationId}/conditional-fields"

	payload := strings.NewReader("{\n  \"name\": \"Eligibility flag\",\n  \"sectionId\": \"contact.identity\",\n  \"expression\": \"contact.age >= 18 && contact.country == \\\"US\\\"\",\n  \"status\": \"active\",\n  \"outputType\": \"boolean\",\n  \"description\": \"Set true when contact passes US adult eligibility checks\",\n  \"type\": \"contact\",\n  \"sectionType\": \"identity\"\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://your-instance.example.com/api/organizations/{organizationId}/conditional-fields")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"Eligibility flag\",\n  \"sectionId\": \"contact.identity\",\n  \"expression\": \"contact.age >= 18 && contact.country == \\\"US\\\"\",\n  \"status\": \"active\",\n  \"outputType\": \"boolean\",\n  \"description\": \"Set true when contact passes US adult eligibility checks\",\n  \"type\": \"contact\",\n  \"sectionType\": \"identity\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://your-instance.example.com/api/organizations/{organizationId}/conditional-fields")

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\": \"Eligibility flag\",\n  \"sectionId\": \"contact.identity\",\n  \"expression\": \"contact.age >= 18 && contact.country == \\\"US\\\"\",\n  \"status\": \"active\",\n  \"outputType\": \"boolean\",\n  \"description\": \"Set true when contact passes US adult eligibility checks\",\n  \"type\": \"contact\",\n  \"sectionType\": \"identity\"\n}"

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

{
  "_id": "66d0a0b0c0d0e0f0a0b0c0d0",
  "name": "Eligibility flag",
  "sectionId": "contact.identity",
  "expression": "contact.age >= 18 && contact.country == \"US\"",
  "status": "active",
  "outputType": "boolean"
}

{
  "error": "Expression validation failed",
  "diagnostics": {
    "issues": [
      {
        "message": "Unknown field `contact.country2`",
        "line": 1,
        "column": 22
      }
    ]
  }
}

{
  "error": "Expression validation failed",
  "diagnostics": {
    "issues": [
      {
        "message": "Unknown field `contact.country2`",
        "line": 1,
        "column": 22
      }
    ]
  }
}