Payment Integrations That Get the Details Right
Payments are the one integration where a bug means lost money or a broken sale. We wire up payment gateways for checkout, subscriptions, refunds, and reconciliation, with the security and reliability that handling transactions actually demands.
Where This Comes Up
Payment APIs connect the gateways that move money to the systems a business actually runs on.
Online Checkout
Secure checkout integrated into a website, store, or app so payments complete smoothly without dropped transactions.
Subscription Billing
Recurring billing for SaaS and membership products, with plan changes and renewals handled through the gateway subscription APIs.
Refunds and Disputes
Automated refund processing and dispute handling so it does not require manual work in a gateway dashboard.
Reconciliation
Matching gateway transactions against internal records so settlements and discrepancies are tracked, not discovered later.
Invoicing Automation
Invoices generated and payment status updated automatically as part of the billing workflow.
CRM Payment Sync
Payment data synced into a CRM so orders, customers, and transaction status stay connected in one place.
What We Integrate
We connect payment gateways to the platforms a business actually sells on.
eCommerce Payment Integration
Gateway integration for Shopify, WooCommerce, and similar stores, with secure capture and order-status sync so sales complete reliably.
Subscription Billing Integration
Billing cycles, upgrades, downgrades, and renewals built against subscription APIs, keeping account access in sync with payment status.
App and Custom Payment Flows
Payment capture and confirmation built directly against payment APIs for mobile apps or custom platforms that need something a generic checkout cannot give.
Marketplace and Split Payments
Transaction flows for multi-vendor platforms, including split payments and payouts that route funds correctly.
How We Build Payment Flows
A payment flow that drops a transaction or double-charges someone is a serious failure, so we build for the failure cases first.
Tokenization and Compliance
Card data handled through tokenization and gateway-hosted fields so it never touches our servers, keeping the integration aligned with PCI expectations.
- Tokenization + hosted fields
- PCI-aware handling
- Basic fraud checks
Webhooks and Idempotency
Payment status driven by verified webhooks, with idempotent handling so a retried event never double-charges or double-records.
- Verified webhooks
- Idempotent processing
- Correct state under network failure
Reconciliation and Error Recovery
Automated reconciliation between gateway and internal records, with retries and logging that give a full auditable trail.
- Automated reconciliation
- Retry and error handling
- Auditable payment logs
The Stack Around Payment Integrations
The gateway handles the transaction; everything else has to move the data around it correctly.
Payments & Stores
Backend & API
Automation
Data & Delivery
How We Handle Payment Work
Payments demand the highest bar in a codebase: correct, secure, and auditable, with no room for a lost or duplicated transaction.
Security by Default
Tokenization and gateway-hosted fields keep sensitive card data off our servers, and fraud checks are built into the flow, not bolted on later.
Exactly-Once Transactions
Idempotent processing and verified webhooks mean a payment gets captured and recorded exactly once, even when the network hiccups mid-transaction.
Reconciled and Auditable
Transaction logs and automated reconciliation mean discrepancies surface quickly instead of quietly drifting from what the books say.
Where we've used Payment APIs
Live projects built with Payment APIs. Each case study covers what we built and why.
Frequently Asked Questions
A few things people ask before we start a payment integration.
It means connecting a payment gateway to your site, app, or backend so transactions process programmatically — secure checkout, billing, refunds, and reconciliation wired into your store, CRM, or database so payments flow correctly and stay accurately recorded.
We use tokenization and gateway-hosted fields so raw card numbers never touch our servers, which keeps the integration aligned with PCI requirements. Fraud checks and verified webhooks add another layer on top of that.
We integrate gateways into Shopify, WooCommerce, and similar stores, plus SaaS products, mobile apps, and custom backends. The right gateway and approach depends on your region, billing model, and what platform you are already on.
Yes — billing cycles, renewals, plan changes, and failed-payment retries built against the subscription APIs, with account access kept in sync with billing status.
Idempotent processing plus status driven by verified webhooks means a retried request never double-charges. Combined with retry logic and reconciliation, the record stays correct even when a payment fails mid-flight.
A focused checkout or gateway integration is typically three to six weeks. Something with subscriptions, refunds, reconciliation, and multi-party payouts runs six to twelve weeks, including sandbox testing against the gateway.
Technologies we pair with Payment APIs
Need payments that you can actually trust?
We wire up checkout, subscriptions, refunds, and reconciliation with the accuracy and security that handling real money requires. Happy to talk through what your store or app needs.