SecureNexPay is a premium payment automation tool. Use your personal account as a secure payment gateway and accept customer payments directly through your website. Below is a complete guide to our API and integrations.
Our API allows merchants to accept payments from customers by redirecting them to our secure payment gateway. We support card systems, mobile financial services (MFS), and both local and international wallets. Once the transaction is complete, the user is returned to your site with a verification status.
We support both Sandbox for testing and Live for production. Use your respective credentials to generate payment URLs via our REST endpoints.
https://pay.cartthree.com/api/payment/create https://pay.cartthree.com/api/payment/verify POST Request Variables
| Field Name | Description | Required | Example Values |
|---|---|---|---|
| cus_name | Customer's full name | Yes | John Doe |
| cus_email | Valid email address | Yes | john@gmail.com |
| amount | Total payable amount (avoid trailing zeros) | Yes | 10.50 |
| success_url | URL to return after successful payment | Yes | https://site.com/success |
| cancel_url | URL to return if user cancels | Yes | https://site.com/cancel |
| meta_data | Custom data in JSON format | No | {"plan_id": 5} |
| Header Key | Value |
|---|---|
| Content-Type | application/json |
| API-KEY | Your App key |
| SECRET-KEY | Your Secret key |
| BRAND-KEY | Your Brand key |
Follow our sample code to integrate the gateway into your PHP, Laravel, or WordPress projects.
<?php $curl = curl_init(); curl_setopt_array($curl, array( CURLOPT_URL => 'https://pay.cartthree.com/api/payment/create', CURLOPT_RETURNTRANSFER => true, CURLOPT_ENCODING => '', CURLOPT_MAXREDIRS => 10, CURLOPT_TIMEOUT => 0, CURLOPT_FOLLOWLOCATION => true, CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1, CURLOPT_CUSTOMREQUEST => 'POST', CURLOPT_POSTFIELDS =>'{"success_url":"yourdomain.com/success","cancel_url":"yourdomain.com/cancel","webhook_url":"yourdomain.com/webhook","metadata":{"phone":"016****"},"amount":"10"}', CURLOPT_HTTPHEADER => array( 'API-KEY: gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type: application/json' ), )); $response = curl_exec($curl); curl_close($curl); echo $response; ?> <?php $client = new Client(); $headers = [ 'API-KEY' => 'gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type' => 'application/json' ]; $body = '{ "success_url": "yourdomain.com/success", "cancel_url": "yourdomain.com/cancel", "webhook_url": "yourdomain.com/webhook", "metadata": { "phone": "016****" }, "amount": "10" }'; $request = new Request('POST', 'https://pay.cartthree.com/api/payment/create', $headers, $body); $res = $client->sendAsync($request)->wait(); echo $res->getBody(); ?> const axios = require('axios'); let data = JSON.stringify({ "success_url": "yourdomain.com/success", "cancel_url": "yourdomain.com/cancel", "webhook_url": "yourdomain.com/webhook", "metadata": { "phone": "016****" }, "amount": "10" }); let config = { method: 'post', maxBodyLength: Infinity, url: 'https://pay.cartthree.com/api/payment/create', headers: { 'API-KEY': 'gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type': 'application/json' }, data : data }; axios.request(config) .then((response) => { console.log(JSON.stringify(response.data)); }) .catch((error) => { console.log(error); }); import requests import json url = "https://pay.cartthree.com/api/payment/create" payload = json.dumps({ "success_url": "yourdomain.com/success", "cancel_url": "yourdomain.com/cancel", "webhook_url": "yourdomain.com/webhook", "metadata": { "phone": "016****" }, "amount": "10" }) headers = { 'API-KEY': 'gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type': 'application/json' } response = requests.request("POST", url, headers=headers, data=payload) print(response.text) package main import ( "fmt" "strings" "net/http" "io/ioutil" ) func main() { url := "https://pay.cartthree.com/api/payment/create" method := "POST" payload := strings.NewReader(`{"success_url":"yourdomain.com/success","cancel_url":"yourdomain.com/cancel","webhook_url":"yourdomain.com/webhook","metadata":{"phone":"01521412457"},"amount":"10"}`) client := &http.Client { } req, err := http.NewRequest(method, url, payload) if err != nil { fmt.Println(err) return } req.Header.Add("API-KEY", "gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef") req.Header.Add("Content-Type", "application/json") res, err := client.Do(req) if err != nil { fmt.Println(err) return } defer res.Body.Close() body, err := ioutil.ReadAll(res.Body) if err != nil { fmt.Println(err) return } fmt.Println(string(body)) } | Field Name | Type | Description |
|---|---|---|
| Success Response | ||
| status | bool | TRUE |
| message | String | Message for Status |
| payment_url | String | Payment Link (where customers will complete their payment) |
| Error Response | ||
| status | bool | FALSE |
| message | String | Message associated with the error response |
| Completing Payment Page task you will be redirected to success or cancel page based on transaction status with the following Query Parameters: yourdomain.com/(success/cancel)?transactionId=******&paymentMethod=***&paymentAmount=**.**&paymentFee=**.**&status=pending or success or failed | ||
<?php $curl = curl_init(); curl_setopt_array($curl, array( CURLOPT_URL => 'https://pay.cartthree.com/api/payment/verify', CURLOPT_RETURNTRANSFER => true, CURLOPT_ENCODING => '', CURLOPT_MAXREDIRS => 10, CURLOPT_TIMEOUT => 0, CURLOPT_FOLLOWLOCATION => true, CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1, CURLOPT_CUSTOMREQUEST => 'POST', CURLOPT_POSTFIELDS =>'{"transaction_id":"ABCDEFH"}', CURLOPT_HTTPHEADER => array( 'API-KEY: gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type: application/json' ), )); $response = curl_exec($curl); curl_close($curl); echo $response; ?> <?php $client = new Client(); $headers = [ 'API-KEY' => 'gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type' => 'application/json' ]; $body = '{ "transaction_id": "ABCDEFH" }'; $request = new Request('POST', 'https://pay.cartthree.com/api/payment/verify', $headers, $body); $res = $client->sendAsync($request)->wait(); echo $res->getBody(); ?> const axios = require('axios'); let data = JSON.stringify({ "transaction_id": "ABCDEFH" }); let config = { method: 'post', maxBodyLength: Infinity, url: 'https://pay.cartthree.com/api/payment/verify', headers: { 'API-KEY': 'gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type': 'application/json' }, data : data }; axios.request(config) .then((response) => { console.log(JSON.stringify(response.data)); }) .catch((error) => { console.log(error); }); import http.client import json conn = http.client.HTTPSConnection("local.pay.expensivepay.com") payload = json.dumps({ "transaction_id": "ABCDEFH" }) headers = { 'API-KEY': 'gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef', 'Content-Type': 'application/json' } conn.request("POST", "/api/payment/verify", payload, headers) res = conn.getresponse() data = res.read() print(data.decode("utf-8")) package main import ( "fmt" "strings" "net/http" "io/ioutil" ) func main() { url := "https://pay.cartthree.com/api/payment/verify" method := "POST" payload := strings.NewReader(`{"transaction_id":"ABCDEFH"}`) client := &http.Client { } req, err := http.NewRequest(method, url, payload) if err != nil { fmt.Println(err) return } req.Header.Add("API-KEY", "gnXi7etgWNhFyFGZFrOMYyrmnF4A1eGU5SC2QRmUvILOlNc2Ef") req.Header.Add("Content-Type", "application/json") res, err := client.Do(req) if err != nil { fmt.Println(err) return } defer res.Body.Close() body, err := ioutil.ReadAll(res.Body) if err != nil { fmt.Println(err) return } fmt.Println(string(body)) } { "cus_name": "John Doe", "cus_email": "john@gmail.com", "amount": "900.000", "transaction_id": "OVKPXW165414", "metadata": { "phone": "015****", }, "payment_method": "bkash", "status": "COMPLETED" } | Field Name | Type | Description |
|---|---|---|
| Success Response | ||
| status | string | COMPLETED or PENDING or ERROR |
| cus_name | String | Customer Name |
| cus_email | String | Customer Email |
| amount | String | Amount |
| transaction_id | String | Transaction id Generated by System |
| metadata | json | Metadata used for Payment creation |
| Error Response | ||
| status | bool | FALSE |
| message | String | Message associated with the error response |
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