API Testing

Ensure your APIs are reliable, secure, and performant with our detailed testing services.

What is API Testing?

API testing is a type of software testing that focuses on the application programming interfaces (APIs) that connect different systems. It validates API functionality, reliability, performance, and security, ensuring that the foundational layer of your application is stable, secure, and scalable.

What We Cover

Functional & Logic Testing

Verifying that API endpoints return the correct data and handle all business logic as expected.

Performance & Load Testing

Testing API response times and behavior under heavy load to ensure scalability.

Security Testing

Checking for vulnerabilities like improper authentication, data exposure, and injection flaws.

Integration Testing

Ensuring your API works correctly with third-party services and other parts of your application.

The KualitySoft Way: Our Specialized Process

API Discovery & Documentation Review

We start by understanding your API endpoints, request/response formats, and authentication mechanisms using tools like Swagger/OpenAPI.

Test Case & Scenario Design

Creating a comprehensive set of tests covering valid inputs, error handling, edge cases, and security.

Automated Test Execution

Using tools like Postman, ReadyAPI, or custom scripts to run tests and validate responses automatically.

CI/CD Pipeline Integration

Integrating API tests into your build pipeline to catch issues as soon as they are introduced.

Why KualitySoft?

Focus on the Full Contract

We test more than just successful '200 OK' responses. We rigorously test error codes, data validation, and security headers.

Headless for Speed

By testing at the API layer, we can provide much faster feedback than UI-based tests, accelerating your development cycle.

Provider & Consumer Perspective

We understand how to test APIs both as the provider and as a consumer, ensuring robust and reliable integrations.

"The KualitySoft team was instrumental in our product launch. Their attention to detail and transparent reporting gave us the confidence we needed to go live. Highly recommended!"

— CEO, Fintech Startup, London