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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.

Testmanagement für Fahrgastinformationssysteme im Bahnverkehr

Aug 27, 2026

Fahrgastinformationen müssen aus verschiedenen Quellen zuverlässig verarbeitet, aktualisiert und für weitere...

Von der Blockade zum Go-live: Testmanagement für eine geschäftskritische Contact-Center-Migration im Versicherungsumfeld

Jul 27, 2026

Wenn das Contact Center ausfällt, ist der Versicherer für seine Kunden nicht erreichbar. Für mehrere tausend...

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...
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.

Test Tribe Meetup Berlin: Pixel und Patientensicherheit

Aug 28, 2026

Diese Woche waren wir beim Test Tribe Meetup in Berlin, zu Gast bei SumUp. Rund 60 Teilnehmerinnen und...

Wenn der Airline-Chatbot Gepäckregeln erfindet

Aug 27, 2026

Am Abend des 25. August 2026 hat TestSolutions in die Dorian Grey Lounge im Airport Club Frankfurt...

Warum externe Unterstützung beim Softwaretesten sinnvoll ist

Aug 14, 2026

Der Go-live ist freigegeben, die fachlichen Anforderungen sind erfüllt und im Projektstatus stehen fast alle...

Automatisierte Regressionstests in regulierten Umgebungen: Warum Compliance-Risiken schleichend entstehen

Aug 6, 2026

Eine wachsende manuelle Regressionssuite bedeutet nicht nur steigenden Arbeitsaufwand. In regulierten...