curl --request POST \
  --url https://sandbox.users.niobi.co/api/v4/niobi-unified-process-transaction \
  --header 'Content-Type: application/json' \
  --data '
{
  "client_id": "<string>",
  "sender": "<string>",
  "timestamp": 123,
  "salt": "<string>",
  "signature": "<string>",
  "params": {
    "otp": "1234",
    "payment_token": "NIO-S0000001"
  }
}
'

import requests

url = "https://sandbox.users.niobi.co/api/v4/niobi-unified-process-transaction"

payload = {
    "client_id": "<string>",
    "sender": "<string>",
    "timestamp": 123,
    "salt": "<string>",
    "signature": "<string>",
    "params": {
        "otp": "1234",
        "payment_token": "NIO-S0000001"
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    client_id: '<string>',
    sender: '<string>',
    timestamp: 123,
    salt: '<string>',
    signature: '<string>',
    params: {otp: '1234', payment_token: 'NIO-S0000001'}
  })
};

fetch('https://sandbox.users.niobi.co/api/v4/niobi-unified-process-transaction', 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://sandbox.users.niobi.co/api/v4/niobi-unified-process-transaction",
  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([
    'client_id' => '<string>',
    'sender' => '<string>',
    'timestamp' => 123,
    'salt' => '<string>',
    'signature' => '<string>',
    'params' => [
        'otp' => '1234',
        'payment_token' => 'NIO-S0000001'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "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://sandbox.users.niobi.co/api/v4/niobi-unified-process-transaction"

	payload := strings.NewReader("{\n  \"client_id\": \"<string>\",\n  \"sender\": \"<string>\",\n  \"timestamp\": 123,\n  \"salt\": \"<string>\",\n  \"signature\": \"<string>\",\n  \"params\": {\n    \"otp\": \"1234\",\n    \"payment_token\": \"NIO-S0000001\"\n  }\n}")

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

	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://sandbox.users.niobi.co/api/v4/niobi-unified-process-transaction")
  .header("Content-Type", "application/json")
  .body("{\n  \"client_id\": \"<string>\",\n  \"sender\": \"<string>\",\n  \"timestamp\": 123,\n  \"salt\": \"<string>\",\n  \"signature\": \"<string>\",\n  \"params\": {\n    \"otp\": \"1234\",\n    \"payment_token\": \"NIO-S0000001\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sandbox.users.niobi.co/api/v4/niobi-unified-process-transaction")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"client_id\": \"<string>\",\n  \"sender\": \"<string>\",\n  \"timestamp\": 123,\n  \"salt\": \"<string>\",\n  \"signature\": \"<string>\",\n  \"params\": {\n    \"otp\": \"1234\",\n    \"payment_token\": \"NIO-S0000001\"\n  }\n}"

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

{
  "success": true,
  "message": "Transaction completed successfully.",
  "data": {
    "status": "success",
    "payment_step": 2,
    "third_party_reference_1": "ORDER-991"
  }
}

{
  "success": false,
  "message": "Invalid or expired OTP, or payment_token not found."
}

{
  "success": false,
  "message": "Entity integration record not found or Client id not matched or Request was not verified."
}