Mobile App API Integration That Grows Your Brand
Behind every good app is a reliable backend. We build and connect the APIs your app needs: user logins, payments, databases, notifications, maps and AI, so data moves quickly and securely, even on slow mobile networks.
Secure Data
Encrypted and protected
Fast APIs
Light on mobile data
Easy Payments
UPI and in-app purchases
Quick Logins
Google, Apple, OTP
Offline Support
Syncs when back online
Backend Expert
One point of contact
Complete App API Integration Solutions
All the connections your app needs to work reliably and securely.
RESTful & GraphQL Endpoints
Fast REST or GraphQL APIs that send only the data the app needs.
Payment & Subscription Webhooks
Razorpay, UPI, Stripe and in-app purchase setup, with secure payment confirmation.
Real-Time WebSocket Sync
Live chat, location tracking and instant updates.
Social Login & OAuth 2.0
Sign in with Google, Apple or mobile number OTP.
Cloud Media Uploads
Fast, secure photo and video uploads to the cloud, with compression.
Offline Data Queueing
Actions are saved when offline and synced automatically once the user is back online.
Our App API Integration Process
Four steps to connections that are secure, fast and easy to maintain.
API Planning
We document every API clearly with OpenAPI.
Integration
We connect the app to each API with proper error handling.
Security
Login tokens stored safely in the phone's secure storage.
Network Testing
We test on slow networks to keep the app fast.
Backend & API Technologies We Use
Proven backend tools that keep your app's data fast and secure.
App API Integration Projects
A few of the app backends and integrations we've built.
Payments API for a Fintech App
UPI and card payments with secure confirmation for a fast, reliable and seamless payment experience. 2.5M+ successful transactions, 99.98% payment success rate, and 70% reduction in payment failures with 1.2 sec response time.
Real-Time Tracking for Delivery
Live location and order updates over WebSockets for a faster, more transparent delivery experience. 62% reduction in support queries, 40% faster delivery completion (5.1 min), and 98.5% on-time deliveries with 4.8/5 CSAT.
Wearable Sync for a Fitness App
Data sync between the app, cloud and wearables for a seamless and real-time fitness experience. 98.7% sync success rate, <2 sec average sync time, 1.8M+ active users synced, and +40% user engagement.
What Our Clients Say
Rated 4.4 stars on Google by the businesses we work with.
“WebCentrix built our payment and authentication infrastructure from scratch. Integrating Razorpay, UPI auto-debit, and Apple Pay with webhook reconciliation reduced our failed checkout rate by 70%. Their team handled edge cases like slow 3G connections effortlessly.”
Siddharth Verma
CTO, FinEdge Payments
“We needed live driver tracking and instant push notifications over WebSockets for our quick-commerce app. WebCentrix delivered a resilient backend architecture that handles peak evening loads without dropping a single packet. Support queries dropped by 62%.”
Neha Kulkarni
VP Product, QuickBite Delivery
“Connecting our Flutter app with Apple Health, Google Fit, and Garmin cloud APIs seemed daunting until WebCentrix took over. They built a clean synchronization queue that keeps data updated in under 2 seconds while maintaining 98.7% sync reliability.”
Arjun Nambiar
Founder, PulseTrack Health
App API Integration Insights & Guides
Guides to connecting your app to the services it needs.
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Tell us what your app needs to connect to, and we'll send a free integration plan.
App API Integration FAQs
Clear answers to common questions about connecting mobile apps to backend services, payments, and databases.
Have a question about connecting your mobile app?
Our backend engineers will review your architecture and send a free integration roadmap.