Custom REST API Development & Integration Services
We engineer secure, low-latency RESTful APIs and seamless third-party software integrations. Whether you need a mobile application backend, webhook synchronization, or custom payment gateway connections, we deliver reliable API infrastructure.
Problems Solved with Custom API Engineering
Modern web operations depend on disparate systems working together reliably:
Slow Response Times
Unoptimized endpoint payloads and excessive database joins cause high latency for mobile apps and user interfaces. We optimize data transfer with lean JSON structures and indexing.
Dropped Webhooks & Desyncs
Missing webhooks from payment gateways or external CRMs lead to lost revenue records and customer confusion. We build idempotent, retry-capable webhook receivers.
Endpoint Security Vulnerabilities
Exposed APIs risk unauthorized access, scraping, and injection attacks. We implement JWT authentication, API secret rotation, rate limiting, and CORS verification.
Our API Engineering Capabilities
Custom RESTful Endpoints
Structured JSON endpoints adhering to REST standards, standard HTTP status codes, and clear error responses.
Payment Gateway APIs
Integrations with Razorpay, Stripe, PayPal, and PayU, including automated checkout callbacks and refunds.
Mobile App Backends
Scalable backends supporting iOS and Android apps with token authentication, push notifications, and data caching.
Messaging & SMS APIs
Automate WhatsApp Business notifications, transactional SMS alerts, and transactional email triggers via SendGrid/SMTP.
CRM & ERP Connectors
Synchronize customer records, inventory levels, and order histories between your custom website and business ERPs.
Rate Limiting & Auth
Protect your server infrastructure with sliding-window rate limiting, JWT token management, and IP whitelisting.
Our API Development Process
Contract Definition
Specifying request payloads, response structures, query parameters, and required HTTP methods.
Secure Coding
Implementing validation schemas, token decoders, database queries, and structured error handlers.
Testing & Profiling
Running load tests with concurrent calls, verifying idempotency, and validating CORS headers.
Documentation
Delivering clear OpenAPI/Postman documentation and environment variables for seamless client integration.
API Development FAQ
How fast do your API endpoints respond?
Our custom PHP and CodeIgniter/Laravel API endpoints are built with optimized SQL indices and low overhead, typically responding in under 100 to 250 milliseconds on standard servers.
Do you provide Postman collections for testing?
Yes. Every API project includes a comprehensive Postman collection with sample request bodies, authentication headers, and environment variables.
Can you connect legacy PHP software with modern external APIs?
Yes. We specialize in building secure cURL middleware connectors that enable older systems to exchange data cleanly with modern cloud services.
Related Engineering Services
Need Fast, Secure API Development?
Discuss your integration architecture and data requirements directly with our senior developers.