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.
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.
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.
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.
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 Bedeutung von Qualitätssicherung bei der E-Mail-Kommunikation
Feb 12, 2026
Softwaretesting in der Luftfahrtindustrie: Einblick in den Testprozess
Feb 12, 2026
Optimierung des Testprozesses in der Luftfahrtindustrie
Feb 12, 2026
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!
News from TestSolutions
Stay informed about our latest developments, projects and industry insights.
Banking-IT: Warum Resilienz wichtiger ist als Fehlerfreiheit
Feb 9, 2026
TestSolutions GmbH übernimmt Geschäftsbetrieb der Berliner ASQA Software Quality Assurance GmbH
Dec 12, 2025
EU AI Act: Warum KI-Kompetenz jetzt Pflicht ist
Dec 3, 2025
German Testing Night Berlin 2025 – Drei Impulse für die Qualität
Nov 21, 2025

