App API Integration
Modern applications do not exist in isolation. They connect to payment processors, CRM systems, email providers, analytics platforms, shipping APIs, social networks, and dozens of other services that power critical business functionality. Anubiz Labs specializes in building robust API integrations that are reliable, maintainable, and resilient to the inevitable changes that third-party providers make to their interfaces.
Need this done for your project?
We implement, you ship. Async, documented, done in days.
Common API Integrations We Build
Payment processing with Stripe, PayPal, Square, or crypto payment gateways. Email delivery through SendGrid, Postmark, or Amazon SES. SMS and messaging via Twilio, Vonage, or WhatsApp Business API. Analytics with Mixpanel, Amplitude, Segment, or Google Analytics. CRM synchronization with Salesforce, HubSpot, or Pipedrive. Cloud storage through S3-compatible providers.
We have integrated with hundreds of APIs across these categories and many more. Each integration is built with proper error handling, retry logic, and fallback behavior so a third-party outage does not crash your application. We also implement webhook receivers for event-driven integrations that need to respond to real-time notifications from external services.
Integration Architecture
We do not scatter API calls throughout your codebase. Every third-party integration lives in a dedicated service layer with a clean interface that isolates your business logic from the specifics of the external API. This abstraction means you can switch from Stripe to a different payment processor, or from SendGrid to Postmark, by changing a single module without touching the rest of your application.
For integrations that involve data synchronization between systems, we implement event-driven architectures with message queues that handle the inherent unreliability of network communication. Failed sync operations are retried automatically with exponential backoff, logged for debugging, and surfaced in monitoring dashboards so nothing falls through the cracks.
We also build integration health dashboards that show the status of every connected service — response times, error rates, and quota usage. This gives your operations team early warning when an integration is degrading before it affects your users.
Authentication and Security
API integrations often require storing sensitive credentials — API keys, OAuth tokens, webhook secrets, and encryption keys. We manage these using environment variables and secret management tools, never hardcoding credentials in source code. Secrets are rotated on a regular schedule, and access is logged for audit purposes.
OAuth integrations that connect to your users' accounts — like Google Calendar, Slack, or GitHub — are implemented with proper token refresh flows, scope management, and consent screens that clearly explain what access your app needs and why. We handle the edge cases that most implementations miss: expired tokens, revoked permissions, and rate limiting.
Custom API Development
When a third-party service does not offer an official API or SDK, we build custom integrations through web scraping, email parsing, or protocol-level communication. We have built integrations with legacy systems that only speak SOAP, government APIs with inconsistent documentation, and internal enterprise systems with custom authentication schemes.
We also build APIs that expose your application's data and functionality to your partners, customers, or internal tools. These APIs follow the same standards we apply to our backend work — proper authentication, rate limiting, versioning, documentation, and monitoring. Your API becomes a product in itself, not an afterthought.
Why Anubiz Labs
Ready to get started?
Skip the research. Tell us what you need, and we'll scope it, implement it, and hand it back — fully documented and production-ready.