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API Testing

Reliable interfaces and seamless integrations.

Reliable interfaces form the foundation of modern software architectures. APIs link applications, systems, and services - but without systematic testing, errors, integration problems, and security risks may remain undetected. TestSolutions conducts comprehensive API testing to validate the functionality, performance, and security of your interfaces.

Our tests uncover integration errors early, ensure data integrity, and guarantee that APIs function reliably even under load. Through automated API tests, regressions can be detected efficiently, development cycles are accelerated, and maintenance costs can be reduced. Using structured testing methods, we ensure stable, high-performing, and secure APIs that can be seamlessly integrated into your IT environment.

Case Studies

Validate API Functionality, Performance and Security

Avoid errors at an early stage.

Detect Integration Problems at an early stage

Prevent failures and data inconsistencies.

Use Automated Tests

Achieve faster releases and lower maintenance costs.

Ensure Data Integrity and Compliance

Consistently comply with security standards.

Expert API testing for your interfaces

APIs are the backbone of modern applications, but faulty interfaces can lead to security risks, integration problems, and system failures. Our experienced test engineers conduct targeted API testing to ensure functionality, performance, and security. We test REST, SOAP, and GraphQL interfaces for reliable communication, accurate data processing, and stable performance under real-world conditions.

Our consultants handle the complete planning and execution of API tests, from test case design to automated test execution. Using modern tools and proven testing methods, they analyze whether APIs behave as expected, process data consistently, and interact reliably with other systems.
software development api test
API CLI Test Run Detail

API Quality Assurance as a Service

Companies that require regular API testing but lack the internal resources to perform it can benefit from our specialized testing service. TestSolutions systematically conducts API tests as part of your development and operational processes, ensuring that interfaces operate flawlessly at all times.

Our experts integrate API testing into your release and CI/CD processes to detect issues early and prevent regressions. We ensure that your APIs integrate seamlessly with third-party systems, meet performance requirements, and identify security risks at an early stage.

Consulting, training and tool support for API tests

A solid test strategy, automated test procedures, and the right tooling are essential for efficient API testing. TestSolutions advises companies on the introduction and optimization of API test strategies, the selection of suitable test tools, and their integration into existing test and development processes. We work with proven tools such as Postman, SoapUI, RestAssured, and Karate, and help you establish an efficient API testing architecture.

For companies looking to build internal expertise, we offer hands-on API testing training offering in-depth knowledge of API testing methods, test automation, and security analysis. Our training courses and workshops enable teams to conduct API tests in a structured way and systematically safeguard interfaces.
API CLI Test Run

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Case Studies

Find out how we turn complex test projects into measurable success. Our practical examples show how we work with our customers to ensure quality and minimize risks.

Die Einführung und der Betrieb von ServiceNow

Feb 12, 2026

Ein führendes Unternehmen setzt ServiceNow als zentrales Infrastruktur-Service-Management-Tool ein. In einer...

Die Bedeutung von Qualitätssicherung bei der E-Mail-Kommunikation

Feb 12, 2026

Relevanz der Qualitätssicherung in der E-Mail-Kommunikation der Reisebranche Eine präzise und professionelle...

Softwaretesting in der Luftfahrtindustrie: Einblick in den Testprozess

Feb 12, 2026

Effektives Softwaretesting in der Luftfahrtindustrie Innovation und Technologie sind in der...

Optimierung des Testprozesses in der Luftfahrtindustrie

Feb 12, 2026

Optimierung des Testprozesses in der Luftfahrtindustrie: Eine End-to-End-Teststrategie für komplexe Systeme...
Seminar participants TestSolutions Academy

TestSolutions Academy

We prepare you for success.

Our training courses are theoretically sound, practical and directly applicable.
Whether ISTQB, A4Q, IREB, Xray or individual workshops - with us you learn what really matters.
For companies or private individuals - we deliver the know-how!

visit our academy

News from TestSolutions

Stay informed about our latest developments, projects and industry insights.

Die „Split-Brain“-Transformation im Airline Retailing verstehen

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Mar 17, 2026

Die ITB Berlin 2026 liegt hinter uns – und für TestSolutions waren es zwei intensive, erkenntnisreiche Tage...

SDUI & KI-Agenten: Den Nicht-Determinismus in der QA beherrschen

Mar 10, 2026

Die Softwareentwicklung erlebt derzeit einen Paradigmenwechsel, der die traditionelle Rollenverteilung...

Automatisierte Lotterie-Tests: Mit Statistik gegen Millionenrisiken

Feb 23, 2026

Lotterien schütten wöchentlich Millionenbeträge an glückliche Gewinner aus. Doch schon ein unscheinbarer...