API IntegrationsCustom quote

Payment Gateway Integration

Integration of supported payment provider APIs into an application, including checkout or payment flows, transaction status handling and webhook processing where required.

From $100 · 1-4 weeks

Starting from

$100

Typical range: $100 – $1,500

1-4 weeks

Type: Custom quote

Final pricing depends on approved project scope and complexity.

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Overview

The integration connects your application to the payment provider you have an account with, covering checkout or payment links, order status updates, refunds where supported, and signature-verified webhook handling. Card data is handled through the provider's hosted fields or redirect flow rather than stored on your servers. Everything is tested in the provider's sandbox first, and you receive the integrated code, environment configuration notes and a description of each transaction status your system handles.

Benefits

Online payments inside your product
Accurate order and transaction statuses
Card data kept on provider side
Verified handling of payment events

What's included

Provider setup
Checkout integration
Webhook handling
Testing

Typical use cases

Launching checkout in an online store
Adding subscriptions or recurring billing to SaaS
Accepting payments in a mobile app
Switching to a different payment provider
Fixing unreliable payment status updates

How it works

Review of provider capabilities and payment flows
Checkout and transaction logic implementation
Webhook handling with signature verification
Sandbox testing of success, failure and refund cases
Switch to live keys and handover

What we need from you

Active merchant account with the chosen provider
Sandbox and live API credentials
Access to the application repository
Description of products, plans or order flow

Service FAQ

No. The merchant account, verification and contract with the payment provider are on your side. We integrate using the API credentials you provide.

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