using RestSharp;


var options = new RestClientOptions("https://api.sandbox.{id}.gr4vy.app/buyers/{buyer_id}/shipping-details");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
request.AddJsonBody("{\n  \"first_name\": \"John\",\n  \"last_name\": \"Lunn\",\n  \"email_address\": \"john@example.com\",\n  \"phone_number\": \"+1234567890\",\n  \"address\": {\n    \"city\": \"London\",\n    \"country\": \"GB\",\n    \"postal_code\": \"789123\",\n    \"state\": \"Greater London\",\n    \"state_code\": \"GB-LND\",\n    \"house_number_or_name\": \"10\",\n    \"line1\": \"10 Oxford Street\",\n    \"line2\": \"New Oxford Court\",\n    \"organization\": \"Gr4vy\"\n  }\n}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.sandbox.{id}.gr4vy.app/buyers/{buyer_id}/shipping-details"

	payload := strings.NewReader("{\n  \"first_name\": \"John\",\n  \"last_name\": \"Lunn\",\n  \"email_address\": \"john@example.com\",\n  \"phone_number\": \"+1234567890\",\n  \"address\": {\n    \"city\": \"London\",\n    \"country\": \"GB\",\n    \"postal_code\": \"789123\",\n    \"state\": \"Greater London\",\n    \"state_code\": \"GB-LND\",\n    \"house_number_or_name\": \"10\",\n    \"line1\": \"10 Oxford Street\",\n    \"line2\": \"New Oxford Court\",\n    \"organization\": \"Gr4vy\"\n  }\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://api.sandbox.{id}.gr4vy.app/buyers/{buyer_id}/shipping-details")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"first_name\": \"John\",\n  \"last_name\": \"Lunn\",\n  \"email_address\": \"john@example.com\",\n  \"phone_number\": \"+1234567890\",\n  \"address\": {\n    \"city\": \"London\",\n    \"country\": \"GB\",\n    \"postal_code\": \"789123\",\n    \"state\": \"Greater London\",\n    \"state_code\": \"GB-LND\",\n    \"house_number_or_name\": \"10\",\n    \"line1\": \"10 Oxford Street\",\n    \"line2\": \"New Oxford Court\",\n    \"organization\": \"Gr4vy\"\n  }\n}")
  .asString();

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.sandbox.{id}.gr4vy.app/buyers/{buyer_id}/shipping-details",
  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([
    'first_name' => 'John',
    'last_name' => 'Lunn',
    'email_address' => 'john@example.com',
    'phone_number' => '+1234567890',
    'address' => [
        'city' => 'London',
        'country' => 'GB',
        'postal_code' => '789123',
        'state' => 'Greater London',
        'state_code' => 'GB-LND',
        'house_number_or_name' => '10',
        'line1' => '10 Oxford Street',
        'line2' => 'New Oxford Court',
        'organization' => 'Gr4vy'
    ]
  ]),
  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;
}

import requests

url = "https://api.sandbox.{id}.gr4vy.app/buyers/{buyer_id}/shipping-details"

payload = {
    "first_name": "John",
    "last_name": "Lunn",
    "email_address": "john@example.com",
    "phone_number": "+1234567890",
    "address": {
        "city": "London",
        "country": "GB",
        "postal_code": "789123",
        "state": "Greater London",
        "state_code": "GB-LND",
        "house_number_or_name": "10",
        "line1": "10 Oxford Street",
        "line2": "New Oxford Court",
        "organization": "Gr4vy"
    }
}
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({
    first_name: 'John',
    last_name: 'Lunn',
    email_address: 'john@example.com',
    phone_number: '+1234567890',
    address: {
      city: 'London',
      country: 'GB',
      postal_code: '789123',
      state: 'Greater London',
      state_code: 'GB-LND',
      house_number_or_name: '10',
      line1: '10 Oxford Street',
      line2: 'New Oxford Court',
      organization: 'Gr4vy'
    }
  })
};

fetch('https://api.sandbox.{id}.gr4vy.app/buyers/{buyer_id}/shipping-details', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request POST \
  --url https://api.sandbox.{id}.gr4vy.app/buyers/{buyer_id}/shipping-details \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "first_name": "John",
  "last_name": "Lunn",
  "email_address": "john@example.com",
  "phone_number": "+1234567890",
  "address": {
    "city": "London",
    "country": "GB",
    "postal_code": "789123",
    "state": "Greater London",
    "state_code": "GB-LND",
    "house_number_or_name": "10",
    "line1": "10 Oxford Street",
    "line2": "New Oxford Court",
    "organization": "Gr4vy"
  }
}
'

{
  "type": "shipping-details",
  "id": "8724fd24-5489-4a5d-90fd-0604df7d3b83",
  "buyer_id": "8724fd24-5489-4a5d-90fd-0604df7d3b83",
  "first_name": "John",
  "last_name": "Lunn",
  "email_address": "john@example.com",
  "phone_number": "+1234567890",
  "address": {
    "city": "London",
    "country": "GB",
    "postal_code": "789123",
    "state": "Greater London",
    "state_code": "GB-LND",
    "house_number_or_name": "10",
    "line1": "10 Oxford Street",
    "line2": "New Oxford Court",
    "organization": "Gr4vy"
  }
}

{
  "type": "error",
  "code": "bad_request",
  "status": 400,
  "message": "Missing '****' field",
  "details": [
    {
      "location": "body",
      "type": "value_error.missing",
      "pointer": "/payment_method/number",
      "message": "field required"
    }
  ]
}

{
  "type": "error",
  "code": "unauthorized",
  "status": 401,
  "message": "No valid API authentication found",
  "details": []
}