API Testing with Postman, REST Assured and SOAP UI Intermediate
The Koenig Original course "API Testing with Postman, REST Assured and SOAP UI" equips QA engineers and test automation professionals with advanced skills to overcome the industry-wide gap in API test automation proficiency, where 42% of testers lack confidence in writing scripts. It delivers hands-on mastery of Postman for request scripting, REST Assured for Java-based test automation, and SOAP UI for functional and regression testing, enabling learners to design, execute, and validate robust API test suites for modern microservices architectures.
This course prepares professionals for real-world API testing challenges with Koenig’s Guaranteed-to-Run live training and 30-day lab access, building career-advancing expertise in high-demand tools used by 77% of testing teams, leading to roles in test automation, SDET, and quality engineering with enhanced earning potential.
Training Formats & Pricing
100% Happiness Guarantee · Free Rescheduling · Secure Payment
Course Overview
The API Testing with Postman, REST Assured and SOAP UI course by Koenig Original is designed for QA engineers, automation testers, and software developers seeking to validate and secure modern API-driven applications. While no official certification exam is tied directly to this Koenig Original program, the curriculum aligns with industry-recognized API testing competencies required by employers adopting microservices and DevOps practices. With over 80% of modern web and mobile applications relying on APIs for backend communication, expertise in tools like Postman, REST Assured, and SOAP UI has become essential for roles such as API Test Engineer, Automation QA, and SDET. This course equips professionals with the foundational and advanced skills needed to design, execute, and automate API test cases across REST and SOAP protocols.
Participants gain hands-on experience with key technologies including Postman for manual and automated API testing, REST Assured for Java-based test automation, and SOAP UI for functional and load testing of SOAP and REST services. The course includes dedicated hands-on labs where students build complete test suites, configure environments with dynamic variables, write validation scripts, and integrate tests into CI/CD pipelines using tools like Jenkins and Maven. Learners work within real-world scenarios such as validating JSON and XML responses, implementing OAuth 2.0 authentication, and performing data-driven testing across multiple endpoints. These labs are delivered through Koenig’s cloud-based lab environment, ensuring immediate access to tools and systems without local setup, allowing students to focus on mastering practical testing workflows.
By completing the API Testing with Postman, REST Assured and SOAP UI training, professionals enhance their readiness for high-demand roles in software quality assurance, with certified API testers earning between $80,000 and $110,000 annually according to industry benchmarks. Koenig Original differentiates this offering with Guaranteed-to-Run live sessions, 1-on-1 training options, and official courseware developed by expert instructors with real-world testing experience. Graduates gain not only technical proficiency but also the confidence to contribute immediately in agile and DevOps environments, positioning themselves for career advancement into automation leadership, performance testing, or security-focused QA roles.
What You'll Learn
Prerequisites
- Basic understanding of API testing concepts and client-server architecture is essential for mastering 'API Testing with Postman, REST Assured and SOAP UI' by Koenig Original.
- Familiarity with HTTP protocols, including methods like GET, POST, PUT, DELETE, and response status codes, is crucial for effective API testing with Koenig's course.
- Working knowledge of JSON and XML data formats, along with skills in parsing their structures, helps learners excel in API testing using Postman, REST Assured, and SOAP UI.
- Basic Java programming skills are necessary to implement automated tests in REST Assured, as covered in the Koenig API testing course.
- Experience with web services testing concepts and tools enables you to leverage the comprehensive training provided by Koenig Original.
- Understanding authentication mechanisms such as Basic Auth, Bearer Tokens, and OAuth is vital for secure API testing, a key focus of the Koenig API Testing with Postman, REST Assured and SOAP UI course.
Certification Exam
Everything you need to know about the API Testing with Postman, REST Assured and SOAP UI certification exam
Course Curriculum
Structured learning with hands-on labs and real-world scenarios
1
Day 1– Master API Testing Fundamentals
2
Day 2– Postman API Testing Mastery
3
Day 3– REST Assured Automation Skills
4
Day 4– SOAP UI Testing Expertise
5
Day 5– Advanced API Testing Practices
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.
Career Outcomes
of API Testing with Postman, REST Assured and SOAP UI certified professionals report career advancement within 6 months
Salary Impact
Average salary increase reported after obtaining the API Testing with Postman, REST Assured and SOAP UI certification
*Source: Glassdoor / LinkedIn 2025
Job Roles
- API Tester
- QA Automation Engineer
- Test Automation Specialist
- Software Quality Engineer
- API Test Lead
Companies Hiring
and 5,000+ organizations worldwide seeking API Testing with Postman, REST Assured and SOAP UI certified professionals
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.”
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 -
★★★★★
“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 with Postman, REST Assured and SOAP UI before you enroll
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Read ArticleHappiness Guarantee
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