A mobile app that streamlines horse barn operations, including vet check-ups, feed schedules, and ranch duties.
Hire API Testing Experts
Simplify API Testing with Our Experienced Team
Reliable digital ecosystems depend on the structural integrity of the API layer, where minor schema shifts or unhandled edge cases can trigger cascading frontend failures. Our API and integration testing services go beyond simple status-code checks, implementing rigorous, contract-first validation and security-hardened engineering.
Here is what our API testing experts can do for you:
Implement contract testing via Pact and OpenAPI validation to intercept regressions at the commit level.
Design test matrices that validate boundary conditions, error-path scenarios, and asynchronous flows.
Execute security validation targeting the OWASP API Top 10, specifically BOLA and excessive data exposure.
Integrate automated suites using REST Assured and the Karate DSL into CI/CD pipelines to assess deployment readiness.
Managed Talent. Engineered for Accountability.
Dedicated Full-Time Engineers
FTEs only No freelancers or gig marketplace.
Experienced Talent
Vetted Experts Rapid Deployment
Managed Operations
Senior oversight Time & Task Monitoring
Workflow-Ready Integration
Jira Slack GitHub Teams
Global Overlap
All Time Zones 24/7 Support
Security
ISO 27001 & CMMI3 NDA & IP Secure
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Our Services
Comprehensive API Testing Services
Work with a Dedicated Team for End-to-End API Testing
Building internal API testing expertise is a scaling challenge as modern application demands intensify. SunTec India bridges this gap with deployment-ready API test engineers who integrate into your engineering sprints from day one.
API Test Strategy & Coverage Planning
Our senior API testing consultants assess your API architecture, including endpoint inventory, authentication model, integration dependencies, and release cadence to design a comprehensive API test strategy. We define coverage scope, tool selection, test prioritisation by risk, contract testing approach, and CI integration design. This gives your team a structured API QA framework that scales as your microservices architecture and integration surface area grows.
REST API Testing & Validation
Hire REST API testers to design and execute thorough REST API test suites using tools like Postman, Newman, and REST Assured. These suites cover all endpoint operations (GET, POST, PUT, PATCH, DELETE), request/response schema validation, authentication verification, pagination, filtering logic, rate limiting, and response compliance. Every test is documented with expected vs. actual results, enabling clear defect triage and confident regression sign-off on every deployment.
GraphQL API Testing
Hire GraphQL API testers to design rigorous GraphQL test suites covering query and mutation validation. We verify fragment handling, alias testing, and nested resolver behavior to ensure architectural consistency. Our API test engineers utilize Apollo testing utilities and Postman to validate schema introspection and error propagation. We specifically benchmark deeply nested queries to prevent N+1 database load and performance degradation in production environments.
SOAP & Web Services Testing
Our SOAP API integration testers validate web services and legacy XML APIs using SoapUI and REST-Assured SOAP extensions. The tests cover WSDL contract validation, envelope structure testing, fault response handling, WS-Security authentication, and XML schema compliance. Our extensive SOAP testing coverage is particularly valuable for enterprises having ERP systems, banking platforms, and legacy middleware where SOAP remains the standard inter-system communication protocol.
API Contract & Consumer-Driven Testing
Hire API testers to implement Consumer-Driven Contract (CDC) testing using Pact. This approach enables independent microservices deployment by verifying that each service honors its consumer-defined contracts. Our experts establish Pact Broker workflows and define provider-side verification suites within your CI/CD pipelines. We reduce coordination overhead by catching integration failures before deployment, providing your platform teams with the confidence to release services independently.
API Security Testing (OWASP API Top 10)
Hire API security testers to systematically validate your endpoints against the OWASP API Security Top 10 framework. We perform deep-tier audits for Broken Object Level Authorization (BOLA) and Mass Assignment vulnerabilities. Our engineers utilize Burp Suite and OWASP ZAP to identify security misconfigurations and improper asset management. We also implement Rate Limiting and Injection safeguards to protect your API layer from automated attacks and excessive data exposure.
API Test Automation & CI/CD Integration
Hire API testers to build maintainable, data-driven API test automation frameworks using tools like REST Assured, Karate DSL, and Newman. We directly integrate them into your CI/CD pipeline via Jenkins, GitHub Actions, GitLab CI, or Azure DevOps. Our automation suites execute on every commit, publish results to Allure/Extent Reports, and send Slack/Teams notifications with pass/fail summaries. This converts your deployment pipeline into a quality gate that actively prevents API regressions from reaching staging or production environments.
Your APIs, Our Test Intelligence
Our API testers deliver solutions that pass the real-world test. Start hiring from our global pool.
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One Team, Every Testing Layer
Hire API Testing Experts for Every Tool, Environment, and Test Scenario
Our API testing engineers bring hands-on proficiency across the leading performance and testing platforms. This ensures your application is validated from every angle, at every scale, with the observability to act on what the data reveals.
Postman and Newman
For REST & GraphQL Testing
- Comprehensive Collection Testing: Our API testers build structured Postman collections to validate end to end API workflows (environments, authentication, variable passing, request chaining, and response assertions).
- CI Execution with Newman or Postman CLI: Our team integrates Postman collections into Jenkins or GitLab CI using Newman/ Postman CLI, so API regression checks run automatically.
Ideal For: Exploratory API validation, third-party integration testing, and teams seeking low-overhead API automation with shareable collections.
REST Assured
For Java API Automation
- Fluent Java DSL: Our API testers use REST Assured to build readable and maintainable Java-based API automation suites. These are integrated with JUnit or TestNG for structured execution, reporting, and long-term test maintainability.
- Schema and Data Validation: We validate API responses through JSON schema checks and object mapping for request and response payloads.
Ideal For: Java engineering teams, microservices API testing, enterprise back-end platforms, and organizations that want API automation aligned with existing Java test frameworks.
Karate DSL
Unified API and Performance Testing
- Low Code API Test Authoring: You can hire API test engineers to use Karate to create readable API test scenarios in a Gherkin-style format. This makes test coverage easier to review, maintain, and collaborate on across QA and delivery teams.
- Reusable Functional and Performance Flows: We use Karate with Gatling to reuse functional API flows in performance testing scenarios. This reduces duplicated effort and keeps validation consistent across functional and load testing activities.
Ideal For: Teams that want functional and performance API testing within one framework, BDD-aligned QA workflows, and readable test assets for cross-functional teams.
Pact
For Consumer Driven Contract Testing
- Safer Independent Microservices Deployment: Our API testers define and verify consumer-driven contracts to confirm that provider services continue meeting consumer expectations, helping reduce integration risk as microservices evolve independently.
- Pact Broker Verification Workflow: We manage contract verification workflows via Pact Broker, enabling provider checks and deployment-readiness validation in CI pipelines.
Ideal For: Microservices architectures, distributed systems with multiple consumer-provider dependencies, and organizations practicing continuous delivery across independently deployed services.
SoapUI
For SOAP API Testing
- SOAP Service Validation: Our API testers use SoapUI to validate WSDL-based services, request/ response structures, SOAP faults, and XML schema compliance across enterprise SOAP integrations.
- Security and Workflow Testing: We test SOAP authentication rules, WS Security requirements, and multi-step service interactions to confirm that legacy integrations behave correctly under real business scenarios.
Ideal For: Enterprise systems with legacy SOAP services, XML-based web service validation, and organizations that still depend on SOAP-driven integrations.
Tech Stack
Tools and Technologies Used by Our API Testing Experts
- Test Automation REST Assured Karate DSL SuperTest Pytest Jest
- Testing Frameworks Pact Pactflow Spring Cloud Contract OpenAPI (Swagger)
- Real-Device Clouds Apollo Testing Utilities GraphQL-Tester Altair EasyGraphQL
- Performance & Load Burp Suite OWASP ZAP Postman Security Collections Snyk
- API Testing Postman Newman Hoppscotch Insomnia Charles Proxy
- CI/CD & DevOps WireMock Prism Mountebank Microcks
- Defect Tracking & Management k6 JMeter Gatling Taurus Artillery
- Crash Reporting & Analytics Jenkins GitHub Actions Azure DevOps GitLab CI
- Security Testing Allure Reports ReportPortal ExtentReports Slack Integrations
Frequently Asked Questions
Hire API Test Engineers: FAQ
Hiring dedicated API testing experts from SunTec India is significantly more cost-effective than building specialist in-house API QA capability. Our engagement costs vary based on the API testing specializations required (REST, GraphQL, SOAP, gRPC, contract testing, or security testing). It also varies based on the number of experts, experience level, and engagement models.
Our API testing experts cover the full spectrum of API protocols and architectural styles. We validate OpenAPI/Swagger-defined contracts, HL7 FHIR healthcare APIs, PSD2 financial APIs, and custom internal API platforms. This is done across microservices, monolithic back-ends, and third-party integration surfaces. Whether your API serves a web front-end or an inter-service communication layer, our API integration testers have the expertise and tooling depth to validate it.
Yes. Our API testing experts include automation engineers with hands-on experience building REST Assured, Postman/Newman, Karate DSL, and pytest API automation frameworks. We integrate all automation with your CI/CD pipeline and deliver full framework documentation with structured knowledge transfer sessions.
Yes. API security testing is a core capability within our API testing practice, not an add-on. Our experts conduct OWASP API Security Top 10 assessments using Burp Suite, OWASP ZAP, and custom Postman security test collections. Security testing can be delivered as a standalone engagement or incorporated into an ongoing API testing programme that runs alongside each release cycle.
Yes. We offer GPT integrations services that are designed to be LLM-agnostic. Our API and integration experts can help you with LLM integrations, be it with the ChatGPT API or any other model’s API.
Yes, our API integration testers provide specialized API testing for payment gateways, focusing on the high-concurrency and security-critical nature of financial transactions. Our engineers validate the entire payment lifecycle to ensure data integrity and PCI-DSS compliance.