curl --request POST \
  --url https://api.sandbox.brickken.com/prepare-transactions \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "method": "transferFrom",
  "chainId": "aa36a7",
  "signerAddress": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
  "tokenSymbol": "EXMPL",
  "from": "0x1111111111111111111111111111111111111111",
  "to": "0x2222222222222222222222222222222222222222",
  "amount": "100"
}
'

import requests

url = "https://api.sandbox.brickken.com/prepare-transactions"

payload = {
    "method": "transferFrom",
    "chainId": "aa36a7",
    "signerAddress": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "tokenSymbol": "EXMPL",
    "from": "0x1111111111111111111111111111111111111111",
    "to": "0x2222222222222222222222222222222222222222",
    "amount": "100"
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    method: 'transferFrom',
    chainId: 'aa36a7',
    signerAddress: '0x742d35Cc6634C0532925a3b844Bc454e4438f44e',
    tokenSymbol: 'EXMPL',
    from: '0x1111111111111111111111111111111111111111',
    to: '0x2222222222222222222222222222222222222222',
    amount: '100'
  })
};

fetch('https://api.sandbox.brickken.com/prepare-transactions', 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.sandbox.brickken.com/prepare-transactions",
  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([
    'method' => 'transferFrom',
    'chainId' => 'aa36a7',
    'signerAddress' => '0x742d35Cc6634C0532925a3b844Bc454e4438f44e',
    'tokenSymbol' => 'EXMPL',
    'from' => '0x1111111111111111111111111111111111111111',
    'to' => '0x2222222222222222222222222222222222222222',
    'amount' => '100'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-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.sandbox.brickken.com/prepare-transactions"

	payload := strings.NewReader("{\n  \"method\": \"transferFrom\",\n  \"chainId\": \"aa36a7\",\n  \"signerAddress\": \"0x742d35Cc6634C0532925a3b844Bc454e4438f44e\",\n  \"tokenSymbol\": \"EXMPL\",\n  \"from\": \"0x1111111111111111111111111111111111111111\",\n  \"to\": \"0x2222222222222222222222222222222222222222\",\n  \"amount\": \"100\"\n}")

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

	req.Header.Add("x-api-key", "<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://api.sandbox.brickken.com/prepare-transactions")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"method\": \"transferFrom\",\n  \"chainId\": \"aa36a7\",\n  \"signerAddress\": \"0x742d35Cc6634C0532925a3b844Bc454e4438f44e\",\n  \"tokenSymbol\": \"EXMPL\",\n  \"from\": \"0x1111111111111111111111111111111111111111\",\n  \"to\": \"0x2222222222222222222222222222222222222222\",\n  \"amount\": \"100\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sandbox.brickken.com/prepare-transactions")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"method\": \"transferFrom\",\n  \"chainId\": \"aa36a7\",\n  \"signerAddress\": \"0x742d35Cc6634C0532925a3b844Bc454e4438f44e\",\n  \"tokenSymbol\": \"EXMPL\",\n  \"from\": \"0x1111111111111111111111111111111111111111\",\n  \"to\": \"0x2222222222222222222222222222222222222222\",\n  \"amount\": \"100\"\n}"

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

{
  "transactions": [
    {
      "from": "0x1234567890abcdef1234567890abcdef12345678",
      "to": "0xabcdef1234567890abcdef1234567890abcdef12",
      "value": "0x00",
      "nonce": 3792,
      "chainId": 11155111,
      "data": "0xd362e8a70000000000000000000000000000000000000000000000000000000000000040...",
      "type": 2,
      "maxPriorityFeePerGas": "1150000",
      "maxFeePerGas": "1156037",
      "gasLimit": "0xccef"
    }
  ],
  "txId": "0x46adea7bdf49c576a760102e0d6bc9ecd650b3998588cd3d7f576a7973426aad",
  "info": {
    "tokenizerEmail": "tokenizer@example.com",
    "tokenSymbol": "EXMPL",
    "investorEmail": "investor@example.com"
  }
}