Skip to the main content.
Contact
Contact

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

Contact us

Do you have any questions or would you like to find out more about our services?
We will be happy to help you.

Contact us now

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.

Kein Audit-Risiko mehr: Wie ein Rückversicherer sein Testmanagement revisionssicher aufgestellt hat

Jun 17, 2026

Wenn eine Plattform die analytischen Kernprozesse eines internationalen Rückversicherers unterstützt, ist ein...

Airline Software Testing: Erfolgreiche Crew-Management-Transformation

Jun 10, 2026

Das Crew-Management-System einer Airline wurde durch eine moderne, enterprise-fähige Lösung ersetzt. Ein...

Kleines Release, große Folgen: Ein Praxisfall aus dem Lotterieumfeld

Apr 15, 2026

Drei Tage nach einem unspektakulären Release einer mobilen Anwendung im Lotterieumfeld häuften sich erste...

Qualitätssicherung für Einführung und Betrieb von ServiceNow

Feb 12, 2026

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

Einsatz von KI-Agenten zur Beschleunigung der Software-Qualitätssicherung

Jul 22, 2026

Ein praxisorientierter Ausblick aus der Erfahrung mit realen Projekten Da sich die Lieferzyklen...

Last- und Performancetests für komplexe Systeme: 7 wichtige Services

Jul 16, 2026

Ein System kann im Funktionstest fehlerfrei arbeiten und unter realer Last trotzdem scheitern. Häufig liegt...

DORA-Umsetzung: Testmanagement und Reifegrad für Versicherer gezielt neu ausrichten

Jul 15, 2026

Seit dem 17. Januar 2025 ist der Digital Operational Resilience Act (DORA, Verordnung (EU) 2022/2554) in...

KI-Governance testen: Für die EU-AI-Act-Compliance sind Nachweise erforderlich, keine Papierstapel.

Jul 9, 2026

In den meisten KI-Projekten werden die Bereiche Governance und Testing getrennt voneinander behandelt. Die...