Custom Payment Gateway
Integrations
We Integrate Any API. Local MFS, Global Cards, Bank Gateways, and Crypto.
An optimized, robust transaction infrastructure is the lifeblood of digital software. We design secure, automated transaction verification loops that run continuously with 100% data reconciliation.
Capabilities Scope
Universal APIWe Integrate Any Gateway.
No matter what checkout API or payment vendor your project requires, we build clean integration pipelines that convert checkouts into successfully captured invoices.
Local MFS
Integrating direct checkout scripts and tokenized authorization codes for Bangladesh's leading MFS platforms.
- bKashCheckout / Tokenized API
- NagadPGW Direct Integration
- RocketMFS Gateway API
- UpayMFS Merchant Payment
- CellFinBank-Linked MFS Gate
Banks & Local PGWs
Connecting robust merchant banking portals and consolidated local card gateways for seamless checkout paths.
- SSLCommerzAll-in-one Cards & MFS
- ShurjopayGovernment-Approved Gateway
- City Bank PGWDirect VISA/Mastercard Integration
- EBL SkyPayEnterprise Corporate Payment
- AmarPayFast-Setup Merchant Aggregator
Global Checkout
Scoping international cards, corporate multi-currency billing plans, and global compliance checks.
- StripeGlobal Cards, Apple Pay, Elements
- PayPalStandard Checkout & Subscriptions
- Authorize.NetEnterprise Card Merchant Account
- AdyenHigh-Volume Multi-Country Billing
- 2Checkout (Verifone)Global SaaS Digital Invoicing
Crypto & Web3
Enabling decentralised digital asset checkouts, lightning network micropayments, and wallet signature validations.
- BTCPay ServerSelf-Hosted Decentralized BTC/LN
- Coinbase CommerceMulti-Asset Crypto Checkout
- Binance PayInstant Merchant API
- Solana PayZero-Gas Web3 Token PGW
Standardized Ledger Architecture
Different payment APIs use widely varying request/response formats. We write adapter layers that normalize all gateway structures (webhook payload tokens, receipt arrays, refund states) into a single, clean database ledger, keeping query lookups fast.
// Verify Gateway Signature & Fulfill Order
async function handleWebhook(req: Request) {
const signature = req.headers.get("x-gateway-signature");
const payload = await req.text();
// Validate request authenticity
const isValid = verifyHmacSignature(payload, signature, PROCESS.ENV.PAYMENT_SECRET);
if (!isValid) throw new SecurityError("Invalid webhook signature.");
const data = parseWebhookData(payload); // Normalize gateway body
// Prevent double-spend / multiple triggers
const isProcessed = await ledger.checkProcessed(data.transactionId);
if (isProcessed) return { status: "already_completed" };
await db.transaction(async (trx) => {
await ledger.recordPayment({
amount: data.amount,
txid: data.transactionId,
status: "COMPLETED",
gateway: data.provider, // bKash | Stripe | UddoktaPay
}, trx);
await order.fulfill(data.orderId, trx);
});
return { status: "success" };
}Secured Infrastructure Pillars
Encrypted Credentials
Secret API tokens, merchant credentials, and decryption salts are stored in encrypted environments (AWS Secrets Manager or securely mapped Docker env files) to guarantee zero exposure.
Failsafe Retries
If the user's browser closes during payment checkout processing, our background webhook listeners automatically reconcile checkout states, ensuring orders are fulfilled without manual support overhead.
Real-time Ledgers
Every transaction generates strict, un-duplicatable tracking nodes in database tables. Reconcile records cleanly against bank reports with 100% verification metrics.
Let's engineer your
Billing infrastructure
We specialize in custom billing solutions, multi-gateway routers, and automated bookkeeping. Tell us your gateway criteria, and we'll secure your pipeline.
Initiate Consultation