API Development & Third-Party Integrations

Connect your systems and services with custom APIs and integrations

Modern businesses run on connected systems — but those systems don't always talk to each other out of the box. TechLapse builds custom APIs and integration layers that allow your applications, tools, and platforms to share data seamlessly.

We have integrated payment gateways, WhatsApp Business, accounting software, shipping providers, CRMs, and dozens of other services for clients across India.

API & Integration Services

  • RESTful API Design and Development
  • GraphQL API Development
  • Payment Gateway Integration (Razorpay, Stripe, PayU, PayPal)
  • WhatsApp Business API Integration
  • SMS Gateway Integration (Twilio, MSG91, Fast2SMS)
  • Google Maps, Calendar, and Drive Integration
  • ERP & Accounting Software Integration (Tally, Zoho, QuickBooks)
  • Shipping and Logistics API (Shiprocket, Delhivery, Dunzo)
  • Social Login (Google, Facebook, OTP)

API Security & Documentation

All APIs are built with security best practices — JWT authentication, rate limiting, input validation, and HTTPS enforcement. We provide complete API documentation (Swagger/Postman) so your team can integrate and maintain with confidence.

Middleware & Integration Architecture

For complex multi-system environments, we design integration middleware that handles data transformation, error handling, retry logic, and event-driven architectures using message queues (RabbitMQ, Redis).

Frequently Asked Questions

An API is an interface that allows software to communicate. An integration is the implementation of connecting two or more systems using their APIs. We do both — build new APIs and integrate existing ones.
Yes. We have production experience with Razorpay, PayU, CCAvenue, MSG91, Fast2SMS, WhatsApp Business API, Aadhaar verification APIs, and DigiLocker.
A single third-party integration typically takes 1-2 weeks. Complex multi-system integrations with custom data mapping take 4-8 weeks. We assess and quote based on your specific requirements.
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