Build APIs That Developers Love to Integrate With

Well-documented REST or GraphQL APIs with authentication, rate limiting, versioning, and interactive documentation. Bookuvai builds APIs that scale with your product.

Feature: API Development

APIs are the integration backbone of modern software, enabling your application to communicate with frontends, mobile apps, third-party services, and partner platforms. A well-designed API follows consistent conventions, provides clear documentation, handles errors gracefully, and scales under load. Bookuvai builds APIs that are production-ready, well-tested, and a pleasure for developers to work with.

Benefits

  • Auto-Generated Documentation: Interactive API docs with Swagger/OpenAPI or GraphQL Playground that stay in sync with your code. Try endpoints directly from the browser.
  • Built-In Security: JWT authentication, API key management, rate limiting, CORS configuration, and request validation on every endpoint.
  • Versioning Strategy: URL or header-based API versioning with deprecation warnings, allowing clients to migrate at their own pace.
  • Error Handling: Consistent error response format with error codes, human-readable messages, and field-level validation details.

How It Works

  1. API Design: Define resources, endpoints, request/response schemas, and authentication strategy using OpenAPI or GraphQL schema-first design.
  2. Implementation: Build controllers, services, and data access layers with input validation, error handling, and proper HTTP status codes.
  3. Authentication & Security: Implement JWT-based auth, API key management, rate limiting middleware, and CORS policies for your target clients.
  4. Documentation: Generate interactive documentation from code annotations, including example requests/responses and authentication guides.
  5. Testing & Monitoring: Write integration tests for every endpoint, set up API health checks, and configure request logging and performance monitoring.

Technology Options

  • Express / Fastify + OpenAPI: Node.js REST frameworks with OpenAPI schema validation, auto-generated Swagger docs, and extensive middleware ecosystem. (Best for: RESTful APIs with strong documentation requirements and Node.js teams)
  • GraphQL + Apollo Server: Schema-first GraphQL with type safety, resolver composition, data loader batching, and built-in playground. (Best for: Applications with complex data relationships and multiple frontend consumers)
  • tRPC: End-to-end type-safe APIs without code generation. TypeScript types flow from backend to frontend automatically. (Best for: Full-stack TypeScript monorepos wanting maximum type safety without GraphQL overhead)
  • NestJS: Enterprise-grade Node.js framework with decorators, dependency injection, built-in OpenAPI support, and modular architecture. (Best for: Large-scale APIs needing strict architectural patterns and team conventions)

Estimated Hours

Simple: 12-20 hours | Moderate: 20-45 hours | Complex: 45-90 hours

Frequently Asked Questions

Should I choose REST or GraphQL for my API?
REST is simpler and better for public APIs with straightforward CRUD operations. GraphQL excels when you have multiple frontend consumers, complex data relationships, or need to minimize over-fetching. We help you choose based on your specific use case.
How do you handle API versioning?
We implement URL-based versioning (/api/v1/, /api/v2/) or header-based versioning. Both approaches include deprecation headers, migration guides, and backward compatibility periods.
Can you add an API to an existing application?
Yes. We extract business logic into service layers and expose it via API endpoints. This is a common pattern when adding mobile app support or enabling third-party integrations to an existing web application.