Your product, connected to everything it needs
Payments, data services, messaging, and third-party platforms - integrated reliably into your app or website, with the error handling and testing that keep them working.
What this service covers
Most real products depend on other services: a payment gateway at checkout, a data API feeding the dashboard, an email or messaging service behind the contact form. XCoder integrates these cleanly - authenticated, error-handled, and tested - into Flutter apps, websites, and custom platforms.
We do this constantly in our own builds: the COVID-19 Tracker runs on a live public statistics REST API, the School Portal App talks to a school system API, and our app work regularly includes payment gateway and real-time database integration. If an existing integration in your product is broken or fragile, we can also take it over and fix it.
Everything the service delivers
Payment gateways
Checkout and payment flows integrated and tested end to end.
REST API integration
Third-party and custom REST APIs consumed with proper error handling.
Realtime data
Firebase and Supabase real-time databases connected to your frontend.
Email & messaging
Transactional email and messaging services wired into your forms and flows.
Secure by default
Keys and credentials handled server-side, never exposed in the client.
Fix & take over
Repair or replace fragile integrations in existing products.
The same process as every XCoder project
Discover
Requirements, technical audits, and scoping so nothing gets built twice.
Design
Architecture decisions and UI/UX prototyping validated before code starts.
Develop
Agile sprints, code review, and continuous QA keep quality high.
Test & Review
Full QA, cross-device testing, and a review round with you before anything goes live.
Deploy & Scale
Launch, monitoring, and ongoing optimization once you're live.
What we build with, and how long it takes
Technologies: REST APIs, Postman, Firebase, Supabase, PHP, JavaScript, Flutter/Dart - see the full tech stack.
Timeline & pricing: Integrations are scoped per service with a fixed quote - usually as part of an app or website build. Tell us what you need connected for a scope.
From the portfolio: COVID-19 Tracker - live REST API data. School Portal App - school system API + Firebase. Dress by HMS - eCommerce order & request flows.
Related services: Mobile app development, Web development, Custom software development.
Common questions about api integration
We integrate REST-based payment gateways and third-party APIs generally - the right choice depends on your market and platform, and we'll recommend options during scoping.
Yes. We regularly take over existing projects, audit the current integration, and either repair it or rebuild it cleanly with proper error handling.
We work on simple fixed-quote terms: 50% advance to start the project and 50% before final delivery. Full ownership of the code and design transfers to you on final payment, and every project includes one month of free maintenance.
Ready to start?
Tell us what you're building and we'll come back with a clear scope, a fixed quote, and an honest timeline.
Start a Project