curl --request POST \
  --url https://api.augustus.com/v1/account_holders \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "account_program_id": "550e8400-e29b-41d4-a716-446655440002",
  "beneficiary_data": {
    "legal_name": "Jordan Rivera",
    "residential_address": {
      "line_1": "548 Market St",
      "city": "San Francisco",
      "state": "CA",
      "postal_code": "94103",
      "country_code": "US",
      "line_2": "Apartment 4B"
    },
    "date_of_birth": "1990-01-15",
    "identification": {
      "type": "ssn",
      "value": "123-45-6789"
    },
    "country_of_citizenship": "US"
  }
}
'

import requests

url = "https://api.augustus.com/v1/account_holders"

payload = {
    "account_program_id": "550e8400-e29b-41d4-a716-446655440002",
    "beneficiary_data": {
        "legal_name": "Jordan Rivera",
        "residential_address": {
            "line_1": "548 Market St",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "94103",
            "country_code": "US",
            "line_2": "Apartment 4B"
        },
        "date_of_birth": "1990-01-15",
        "identification": {
            "type": "ssn",
            "value": "123-45-6789"
        },
        "country_of_citizenship": "US"
    }
}
headers = {
    "Idempotency-Key": "<idempotency-key>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'Idempotency-Key': '<idempotency-key>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    account_program_id: '550e8400-e29b-41d4-a716-446655440002',
    beneficiary_data: {
      legal_name: 'Jordan Rivera',
      residential_address: {
        line_1: '548 Market St',
        city: 'San Francisco',
        state: 'CA',
        postal_code: '94103',
        country_code: 'US',
        line_2: 'Apartment 4B'
      },
      date_of_birth: '1990-01-15',
      identification: {type: 'ssn', value: '123-45-6789'},
      country_of_citizenship: 'US'
    }
  })
};

fetch('https://api.augustus.com/v1/account_holders', 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.augustus.com/v1/account_holders",
  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([
    'account_program_id' => '550e8400-e29b-41d4-a716-446655440002',
    'beneficiary_data' => [
        'legal_name' => 'Jordan Rivera',
        'residential_address' => [
                'line_1' => '548 Market St',
                'city' => 'San Francisco',
                'state' => 'CA',
                'postal_code' => '94103',
                'country_code' => 'US',
                'line_2' => 'Apartment 4B'
        ],
        'date_of_birth' => '1990-01-15',
        'identification' => [
                'type' => 'ssn',
                'value' => '123-45-6789'
        ],
        'country_of_citizenship' => 'US'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Idempotency-Key: <idempotency-key>"
  ],
]);

$response = curl_exec($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.augustus.com/v1/account_holders"

	payload := strings.NewReader("{\n  \"account_program_id\": \"550e8400-e29b-41d4-a716-446655440002\",\n  \"beneficiary_data\": {\n    \"legal_name\": \"Jordan Rivera\",\n    \"residential_address\": {\n      \"line_1\": \"548 Market St\",\n      \"city\": \"San Francisco\",\n      \"state\": \"CA\",\n      \"postal_code\": \"94103\",\n      \"country_code\": \"US\",\n      \"line_2\": \"Apartment 4B\"\n    },\n    \"date_of_birth\": \"1990-01-15\",\n    \"identification\": {\n      \"type\": \"ssn\",\n      \"value\": \"123-45-6789\"\n    },\n    \"country_of_citizenship\": \"US\"\n  }\n}")

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

	req.Header.Add("Idempotency-Key", "<idempotency-key>")
	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.augustus.com/v1/account_holders")
  .header("Idempotency-Key", "<idempotency-key>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"account_program_id\": \"550e8400-e29b-41d4-a716-446655440002\",\n  \"beneficiary_data\": {\n    \"legal_name\": \"Jordan Rivera\",\n    \"residential_address\": {\n      \"line_1\": \"548 Market St\",\n      \"city\": \"San Francisco\",\n      \"state\": \"CA\",\n      \"postal_code\": \"94103\",\n      \"country_code\": \"US\",\n      \"line_2\": \"Apartment 4B\"\n    },\n    \"date_of_birth\": \"1990-01-15\",\n    \"identification\": {\n      \"type\": \"ssn\",\n      \"value\": \"123-45-6789\"\n    },\n    \"country_of_citizenship\": \"US\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.augustus.com/v1/account_holders")

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

request = Net::HTTP::Post.new(url)
request["Idempotency-Key"] = '<idempotency-key>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"account_program_id\": \"550e8400-e29b-41d4-a716-446655440002\",\n  \"beneficiary_data\": {\n    \"legal_name\": \"Jordan Rivera\",\n    \"residential_address\": {\n      \"line_1\": \"548 Market St\",\n      \"city\": \"San Francisco\",\n      \"state\": \"CA\",\n      \"postal_code\": \"94103\",\n      \"country_code\": \"US\",\n      \"line_2\": \"Apartment 4B\"\n    },\n    \"date_of_birth\": \"1990-01-15\",\n    \"identification\": {\n      \"type\": \"ssn\",\n      \"value\": \"123-45-6789\"\n    },\n    \"country_of_citizenship\": \"US\"\n  }\n}"

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

{
  "id": "68e0a1b2c3d4e5f60718293a",
  "type": "account_holder",
  "holder_type": "natural_person",
  "status": "pending",
  "beneficiary_data": {
    "legal_name": "Jordan Rivera",
    "residential_address": {
      "line_1": "548 Market St",
      "line_2": "Apartment 4B",
      "city": "San Francisco",
      "state": "CA",
      "postal_code": "94103",
      "country_code": "US"
    },
    "date_of_birth": "1990-01-15",
    "identification": {
      "type": "ssn",
      "value": "123-45-6789"
    },
    "country_of_citizenship": "US"
  },
  "created_at": "2026-01-15T10:30:00Z"
}