API Testing Intermediate
The API Testing course by ISTQB equips software testers, QA engineers, and test automation specialists with essential skills to validate application programming interfaces, addressing the industry’s growing demand for robust integration testing. With 85% of modern applications relying on APIs, this training ensures professionals can detect defects in REST, SOAP, and GraphQL services early, improving system reliability and reducing post-deployment failures.
This course prepares learners for the ISTQB Advanced Level – Technical Test Analyst certification, which includes dedicated API testing objectives. Koenig Solutions provides official vendor-authorized courseware and 30-day lab access, enabling hands-on practice with real-world tools. Graduates gain recognized expertise to advance into roles like API test engineer or automation lead, with higher employability in DevOps and agile environments.
Training Formats & Pricing
100% Happiness Guarantee · Free Rescheduling · Secure Payment
Course Overview
The ISTQB API Testing course is designed to equip software testing professionals with specialized skills in validating application programming interfaces, though it should be noted that ISTQB does not currently offer a standalone API Testing certification. Instead, professionals seeking expertise in this domain typically pursue the Certified Tester Advanced Level Test Automation Engineering (CTAL-TAE) or Technical Test Analyst (CTAL-TTA) certifications, which include comprehensive API testing components. This training is ideal for roles such as Automation Test Engineers, Integration Testers, and Backend QA Specialists who are responsible for ensuring the reliability, security, and performance of API-driven systems. With 95% of organizations reporting production API security issues according to Salt Labs' 2024 research, demand for API testing expertise has surged, making this knowledge critical across industries adopting microservices and cloud-native architectures.
Participants engage with key technologies and methodologies essential for modern API testing, including REST and SOAP protocols, JSON and XML data formats, Postman, SoapUI, and integration with CI/CD pipelines using tools like Jenkins and GitLab. The course includes hands-on lab exercises conducted within a cloud-based lab environment where students build and execute automated API test suites, configure contract testing using frameworks like Pact, and validate error handling, authentication, and response time performance. A core project involves designing a full test automation solution for a microservices-based application, emphasizing testability, maintainability, and integration with DevOps workflows. These practical experiences ensure learners gain real-world proficiency in identifying defects at the service layer, well beyond what UI testing can achieve.
This training prepares candidates for the ISTQB Certified Tester Advanced Level Test Automation Engineering (CTAL-TAE) certification, a globally recognized credential that validates advanced skills in test automation, including API testing strategies. Professionals with this certification can expect competitive salaries, with Automation Testers and SDETs in the U.S. earning between $85,000 and $130,000 annually, according to industry data from Glassdoor and PayScale. Koenig Solutions enhances this learning path with Guaranteed-to-Run batches, official ISTQB-aligned courseware, and access to expert instructors for 1-on-1 mentoring, ensuring learners are fully prepared for exam success. Upon completion, graduates are positioned to advance into senior testing roles, such as Test Automation Architect or SDET, driving quality in high-velocity development environments.
What You'll Learn
Skills You'll Gain
Prerequisites
- Completion of the ISTQB Certified Tester Foundation Level (CTFL) is the recommended foundation for this course.
- A solid understanding of software testing fundamentals is essential for mastering API Testing by ISTQB.
- Familiarity with core API concepts and software architecture is required to understand system integration.
- Knowledge of communication protocols including REST, gRPC, and GraphQL is necessary for designing comprehensive tests.
- Practical experience in test planning and design techniques is required to create efficient test cases.
- Working knowledge of industry-standard API testing tools and execution environments is expected.
- Understanding of specification-based test design for APIs is necessary to ensure test coverage and reliability.
Certification Exam
Everything you need to know about the API Testing certification exam
Course Curriculum
Structured learning with hands-on labs and real-world scenarios
1
Day 1– API Testing Fundamentals aligned with ISTQB CTFL
2
Day 2– Strategic API Test Planning (ISTQB-Standard)
3
Day 3– Functional and Security Testing (Testing of Software Characteristics)
4
Day 4– Performance and Reliability Metrics
5
Day 5– API Testing Tools and Automation (ISTQB CTAL-TAE Standards)
What's Included in Your Training
Every enrollment comes packed with resources to maximise your learning and exam success
Official Courseware
Hands-On Lab Environment (30 days)
Exam Preparation Materials
Practice Test Questions (200+)
Certificate of Completion
Post-Training Support (30 days)
Session Recording Access
Free Rescheduling (7+ days notice)
Hands-On Lab
Live Lab Sandbox
Real EnvironmentPractice in a real lab environment with full access to the tools and services covered in the course.
30+ Guided Labs
30+Step-by-step lab exercises designed to reinforce each module with practical, hands-on tasks.
Lab Manual Included
Full GuideComprehensive lab guide with detailed instructions, screenshots, and troubleshooting tips.
Post-Training Access
30 Days30 days of extended lab access after your training ends so you can continue practicing.
Meet Your Instructor
I am Simmi Anand, a Microsoft Certified Trainer, and UiPath Certified Advanced RPA Developer with over 12 years of rich experience in corporate training and the IT sector. I have been working with Koenig Solutions for the past 8+ years, providing quality training on technologies related to Development, Automation and Testing using various Languages (e.g., Python, Java) and Tools e.g., Robotic Process Automation using UiPath and Automation Anywhere. In addition, I also deliver training on Microsoft and Google technologies, including Mobile Application Development for Android, iOS with Swift, Hybrid Mobile Application using PhoneGap, Microsoft SQL Server, Microsoft PowerApps & Flow, Power Platform and PostgreSQL to global and corporate clients. One reason I enjoy this field and the challenges that come with it is the opportunity to connect with people and solve their IT needs. I am also passionate about learning technologies and gaining solid knowledge about them. I have conducted various onsite training assignments globally with esteemed clients such as Microsoft - India, KPMG, Raw Bank - DRC, FRCI - Mauritius, Google Train the Trainer Project, Infosys, TCS, Wipro, and many others. Associated with Koenig since February-2016.
Course Student Reviews
Real results from IT professionals who trained with Koenig — rated 4.9/5 from 18,400+ verified reviews.
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★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
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“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
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“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
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“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified -
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified
-
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified -
★★★★★
“Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”
AZ-104 Certified ✓ Verified -
★★★★★
“I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”
Enterprise Client ✓ Verified -
★★★★★
“The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”
PL-300 Certified ✓ Verified
-
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified -
★★★★★
“From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”
AZ-305 Expert ✓ Verified -
★★★★★
“As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”
100+ Learners Trained ✓ Verified -
★★★★★
“SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”
SC-300 Certified ✓ Verified
-
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified -
★★★★★
“AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”
AI-102 Certified ✓ Verified -
★★★★★
“DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”
DP-600 Certified ✓ Verified -
★★★★★
“Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”
AZ-400 Team Training ✓ Verified
Resources
Learn more about API Testing before you enroll
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Read ArticleHappiness Guarantee
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