Comprehensive REST and GraphQL API testing with RestAssured and Postman/Newman — covering contract testing, schema validation, authentication flows, and full CI/CD integration for confident API releases.
API test automation is the practice of writing automated tests that verify your application's backend services — the APIs that power your web app, mobile app, and third-party integrations — without going through the user interface.
Why API testing is critical for modern applications: Today's software is built API-first. Your web frontend, mobile app, and third-party integrations all communicate through APIs. A bug in an API endpoint can silently break dozens of downstream features — often before anyone notices. Automated API tests catch these issues at the source, the moment a breaking change is introduced.
At 360 Fahrenheit, our API test automation services cover every dimension of API quality — functional correctness, data validation, authentication security, performance benchmarks, and backward compatibility. We work with REST APIs, GraphQL APIs, and microservice architectures using tools including RestAssured, Postman/Newman, and Karate DSL.
Our clients across Pakistan, Saudi Arabia, UAE, and the UK typically see API test coverage jump from under 15% to over 80% within the first month of engagement — giving their development teams instant feedback on every code change and dramatically reducing production incidents caused by API regressions.
Our API test automation engagements are comprehensive — covering every layer of API quality from functional correctness to security and performance.
We verify that your APIs honour their documented contracts — both the request structure they accept and the response structure they return. Contract tests ensure that when your backend team changes an endpoint, consumer applications are not silently broken. We use OpenAPI/Swagger specs as the source of truth for all contract validation.
We fully automate testing of your API security layer — OAuth2 flows, JWT token validation, API key authentication, session management, and common vulnerability checks. We verify that protected endpoints correctly reject unauthorised requests and that token expiry, refresh, and revocation behave as documented.
Every API response is validated against its JSON schema or OpenAPI specification — checking field types, required fields, nullable constraints, and data format correctness. We also validate HTTP status codes, error message formats, and pagination responses to ensure your API behaves consistently across all scenarios.
Response time assertions and throughput measurements are built into every API test run. We set performance thresholds on your critical endpoints and alert the team when response times degrade — catching performance regressions before they affect your users in production.
Real user journeys involve multiple API calls in sequence — login, fetch data, update record, confirm change. We automate complete multi-step API workflows as end-to-end test scenarios, passing data between requests and validating the state of your application after each step in the chain.
We systematically test boundary values, invalid inputs, malformed requests, missing required fields, and oversized payloads. Thorough negative testing validates that your API returns meaningful, correctly formatted error responses — not unhandled exceptions or vague 500 errors — for every invalid request scenario.
We primarily build API automation with RestAssured and Postman/Newman because they are the most widely adopted, battle-tested tools for Java and JavaScript teams respectively.
RestAssured is the gold standard for API test automation in Java projects. Its fluent, readable DSL makes test code that developers actually want to maintain — given().header(...).when().get("/users").then().statusCode(200). It integrates perfectly with TestNG and JUnit, supports all authentication methods, and produces detailed failure messages that make debugging fast. For Java teams, RestAssured is the natural choice.
Postman/Newman is ideal for teams who want to start quickly, share test collections with non-technical stakeholders, and run tests in CI/CD without a full Java or Python build environment. We build comprehensive Postman collections with environment variables, pre-request scripts, and response tests — then run them via Newman in your Jenkins or GitHub Actions pipeline for fully automated execution.
Karate DSL is our recommendation when teams want a single tool that handles both API and UI testing, or when the test team has limited programming experience. Karate's BDD-style syntax makes API tests readable by business stakeholders, and it requires no Java code for most testing scenarios. We use Karate for projects where collaboration between business analysts and QA engineers is a priority.
Industry-leading API testing tools proven across hundreds of REST and GraphQL service test suites.
A structured engagement that takes you from zero API coverage to a comprehensive, CI/CD-integrated test suite in weeks.
We review your API documentation — Swagger/OpenAPI spec, Postman collections, or existing test cases — and conduct exploratory testing to map all endpoints, authentication methods, and data flows. We identify the highest-risk endpoints and define the automation scope with you.
We design a layered testing strategy covering smoke tests (critical path), regression tests (all endpoints), contract tests (schema validation), and performance benchmarks. You approve the strategy before any code is written.
We build the test framework — request builders, response validators, authentication helpers, test data management, and environment configuration — then write clean, documented test scripts across all layers of the strategy.
Tests are integrated into your CI/CD pipeline via Newman CLI (for Postman collections) or Maven/Gradle (for RestAssured). Every code push triggers automated API test execution with results reported to your team via Allure, email, or Slack.
We configure scheduled API health checks for production monitoring, set up failure alerts, deliver full documentation, and conduct team training. Your engineers leave the engagement confident to maintain and extend the test suite independently.
It helps, but it is not required. If you have a Swagger/OpenAPI spec or existing Postman collections, we use those as the starting point. If not, we conduct API discovery by exploring your endpoints directly and document them as part of the engagement. Many teams find that our API testing process reveals undocumented behaviour in their own APIs.
A focused API testing engagement covering your core endpoints typically takes 2–4 weeks. A comprehensive suite covering all endpoints, negative scenarios, contract tests, and performance benchmarks may take 6–8 weeks depending on the number and complexity of your APIs. We provide a detailed timeline estimate after the discovery phase.
Yes. We have experience testing both REST and GraphQL APIs. For GraphQL, we use Postman's GraphQL support, custom RestAssured configurations, or dedicated tools. We validate query responses, mutation results, subscription behaviour, and error handling for all GraphQL API types.
Yes — CI/CD integration is a standard deliverable in all our API automation engagements. We configure tests to run automatically in Jenkins, GitHub Actions, GitLab CI, Azure DevOps, or whichever pipeline you use. Tests trigger on every pull request and code push.
Absolutely. While we are based in Lahore, Pakistan, we work fully remotely with clients across Saudi Arabia, UAE, UK, and the United States. We work asynchronously across time zones and are available for calls during your business hours. All communication is in English and delivery timelines are aligned to your release schedule.