API Development & Integration Services

API (Application Programming Interface) development is creating interfaces that allow different software applications to communicate and exchange data. APIs define rules and protocols for how applications request and send information. Modern APIs use REST (Representational State Transfer) or GraphQL architectures to enable web services, mobile apps, and third-party integrations. APIs power everything from payment processing to social media logins to cloud storage access.

REST APIs use multiple endpoints (URLs) for different resources, return complete data objects, and use standard HTTP methods (GET, POST, PUT, DELETE). GraphQL uses a single endpoint, allows clients to request exactly the data they need, and supports real-time subscriptions. Choose REST for simple CRUD operations, caching needs, and standard implementations. Choose GraphQL for complex data requirements, mobile apps needing bandwidth optimization, or when you want clients to have flexible queries. We build both based on your needs.

A simple REST API with 5-10 endpoints takes 2-4 weeks. Standard APIs with authentication, 20-30 endpoints, and documentation require 4-8 weeks. Complex APIs with GraphQL, real-time features, advanced security, and multiple integrations need 8-16 weeks. Timelines depend on the number of endpoints, authentication requirements, third-party integrations, and documentation needs. We use agile development with regular deliveries so you can start testing endpoints early.

Basic API development starts at ₹5-12 lakhs for simple REST APIs with standard features. Standard APIs with authentication, documentation, and integrations range from ₹12-30 lakhs. Complex APIs with GraphQL, real-time features, and extensive integrations cost ₹30-80 lakhs. Factors affecting cost include number of endpoints, authentication complexity, third-party integrations, real-time features, and documentation requirements. Most APIs deliver ROI within 6-12 months through automation and integrations.

Yes, we provide comprehensive API documentation using industry-standard tools like Swagger/OpenAPI, Postman collections, or GraphQL playground. Documentation includes endpoint descriptions, request/response examples, authentication guides, error codes and handling, rate limits and quotas, code examples in multiple languages (JavaScript, Python, PHP, cURL), and interactive API testing interfaces. Good documentation ensures developers can integrate quickly and reduces support overhead.

We implement multiple security layers including authentication (JWT tokens, OAuth 2.0, API keys), authorization with role-based access control, HTTPS/TLS encryption for all traffic, rate limiting to prevent abuse, input validation and sanitization, SQL injection prevention, CORS configuration, API versioning for backward compatibility, logging and monitoring, and regular security audits. We follow OWASP API Security Top 10 guidelines and implement security best practices from day one.

Yes, we specialize in third-party integrations. We've integrated with 100+ services including payment gateways (Stripe, Razorpay, PayPal), CRMs (Salesforce, HubSpot), communication (Twilio, SendGrid, Mailchimp), cloud services (AWS, Google Cloud, Azure), accounting (QuickBooks, Xero), e-commerce (Shopify, WooCommerce), and social platforms (Facebook, Google, LinkedIn). We handle OAuth flows, webhook management, data synchronization, error handling, and provide integration documentation.

Yes, we implement proper API versioning to ensure backward compatibility when making changes. Common approaches include URL versioning (/v1/users, /v2/users), header versioning (Accept: application/vnd.api+json;version=1), or query parameter versioning (?version=1). We maintain multiple API versions simultaneously, deprecate old versions gradually with proper communication, and provide migration guides for clients. Proper versioning prevents breaking existing integrations when adding new features.

Yes, we build robust webhook systems for real-time event notifications. Webhooks notify your application instantly when events occur (payment completed, order shipped, user registered). We implement webhook endpoints, event delivery with retry logic, signature verification for security, event filtering and subscription management, payload documentation, and webhook testing tools. Webhooks eliminate the need for constant polling and enable real-time integrations.

Yes, we implement rate limiting to protect APIs from abuse and ensure fair usage. Rate limiting controls include requests per minute/hour limits, different tiers for different users (free, premium, enterprise), IP-based rate limiting, token bucket or sliding window algorithms, rate limit headers in responses (X-RateLimit-Remaining), and graceful degradation when limits are exceeded. Rate limiting prevents DDoS attacks, ensures system stability, and enables tiered pricing models.

Yes, we handle API migrations and modernization including REST to GraphQL conversion, SOAP to REST migration, monolithic to microservices architecture, adding authentication to unprotected APIs, improving performance and caching, updating documentation, and maintaining backward compatibility during migration. We use phased migration strategies to minimize downtime, run old and new APIs in parallel during transition, and provide comprehensive testing to ensure data integrity.

Yes, we offer API maintenance packages including monitoring and uptime tracking, performance optimization, security patches and updates, adding new endpoints as needed, updating documentation, managing API versions and deprecations, handling increased traffic and scaling, and 24/7 support for critical issues. Maintenance packages start at ₹40,000/month and ensure your API remains secure, performant, and reliable as your business grows.