curl --request POST \
  --url https://api.portalhq.io/api/v3/clients/me/chains/{chain}/assets/send/build-user-operation \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "calls": [
    {
      "to": "0xd2b58253741d22bc530b214f8fe81bf1a78a72b1",
      "value": "0"
    },
    {
      "to": "0x9533731C8224CEc3E53D76B72b590D347d9257eC",
      "value": "0",
      "data": "0x"
    }
  ]
}
'

import requests

url = "https://api.portalhq.io/api/v3/clients/me/chains/{chain}/assets/send/build-user-operation"

payload = { "calls": [
        {
            "to": "0xd2b58253741d22bc530b214f8fe81bf1a78a72b1",
            "value": "0"
        },
        {
            "to": "0x9533731C8224CEc3E53D76B72b590D347d9257eC",
            "value": "0",
            "data": "0x"
        }
    ] }
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({
    calls: [
      {to: '0xd2b58253741d22bc530b214f8fe81bf1a78a72b1', value: '0'},
      {to: '0x9533731C8224CEc3E53D76B72b590D347d9257eC', value: '0', data: '0x'}
    ]
  })
};

fetch('https://api.portalhq.io/api/v3/clients/me/chains/{chain}/assets/send/build-user-operation', 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.portalhq.io/api/v3/clients/me/chains/{chain}/assets/send/build-user-operation",
  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([
    'calls' => [
        [
                'to' => '0xd2b58253741d22bc530b214f8fe81bf1a78a72b1',
                'value' => '0'
        ],
        [
                'to' => '0x9533731C8224CEc3E53D76B72b590D347d9257eC',
                'value' => '0',
                'data' => '0x'
        ]
    ]
  ]),
  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://api.portalhq.io/api/v3/clients/me/chains/{chain}/assets/send/build-user-operation"

	payload := strings.NewReader("{\n  \"calls\": [\n    {\n      \"to\": \"0xd2b58253741d22bc530b214f8fe81bf1a78a72b1\",\n      \"value\": \"0\"\n    },\n    {\n      \"to\": \"0x9533731C8224CEc3E53D76B72b590D347d9257eC\",\n      \"value\": \"0\",\n      \"data\": \"0x\"\n    }\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.portalhq.io/api/v3/clients/me/chains/{chain}/assets/send/build-user-operation")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"calls\": [\n    {\n      \"to\": \"0xd2b58253741d22bc530b214f8fe81bf1a78a72b1\",\n      \"value\": \"0\"\n    },\n    {\n      \"to\": \"0x9533731C8224CEc3E53D76B72b590D347d9257eC\",\n      \"value\": \"0\",\n      \"data\": \"0x\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.portalhq.io/api/v3/clients/me/chains/{chain}/assets/send/build-user-operation")

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  \"calls\": [\n    {\n      \"to\": \"0xd2b58253741d22bc530b214f8fe81bf1a78a72b1\",\n      \"value\": \"0\"\n    },\n    {\n      \"to\": \"0x9533731C8224CEc3E53D76B72b590D347d9257eC\",\n      \"value\": \"0\",\n      \"data\": \"0x\"\n    }\n  ]\n}"

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

{
  "data": {
    "userOperation": "{\"sender\":\"0xF86e3fAe8443e4494a689fcDd4C8e6C76c1b2C96\",\"nonce\":\"0x5\",\"initCode\":\"0x\",\"callData\":\"0x34fcd5be...\",\"paymasterAndData\":\"0x\",\"signature\":\"0x00000000ffff...\",\"maxFeePerGas\":\"0x58556415\",\"maxPriorityFeePerGas\":\"0x15d0ea4\",\"callGasLimit\":\"0x3f9b\",\"verificationGasLimit\":\"0x13d75\",\"preVerificationGas\":\"0xc808\"}",
    "userOpHash": "0xba1f6f1fe76b7a39d660bd02f54a3de5eae99ab413a95246e394c06786003847"
  },
  "metadata": {
    "chainId": "eip155:11155111",
    "totalGas": "148760",
    "maxFeePerGas": "1481991189",
    "estimatedGasCostWei": "220461009275640"
  }
}

{
  "error": "Account Abstraction is not enabled, contact support to enable it"
}

{
  "error": "<string>"
}

{
  "error": "Policy violation: amount exceeds limit (Max transfer)",
  "policyViolation": {
    "policyId": "policyId",
    "policyName": "Max transfer",
    "reason": "amount exceeds limit (Max transfer)",
    "ruleId": "ruleId"
  }
}