I will test your rest API using postman and create automated API tests with feedback
QA Tester, Website, Mobile App, API and Performance Testing
About this Gig
Are your REST APIs working correctly? Do you need reliable API testing before launching your application?
I will professionally test your REST API using Postman to identify errors, validate responses, and help ensure your backend services work as expected.
My API testing services include:
- REST API functional testing
- API testing using Postman
- GET, POST, PUT, PATCH and DELETE testing
- HTTP status code validation
- JSON response and data validation
- API authentication and authorization checks
- Positive and negative testing
- Request headers and parameter validation
- Postman collection creation
- Automated API testing scripts
- API regression testing
- Bug reports with steps to reproduce issues
What you will receive:
- Tested API endpoints
- Clear test results
- Postman collections where included in your package
- Screenshots and error details where applicable
- Detailed API testing report
- Practical recommendations
Whether you are developing a new backend, debugging an existing API, or preparing your application for launch, I will help you identify API issues and improve reliability.
Please contact me before ordering if you have a large API, complex authentication setup, or custom testing requirements.
Testing application:
API
Development technology:
.NET
•
C/C++
•
HTML & CSS
•
Java
•
JavaScript
Device:
PC
•
Mac
•
iPhone
•
iPad
•
Android mobile phone
FAQ
What types of APIs can you test?
I can test REST APIs and JSON-based web services using Postman. I can test endpoints, HTTP methods, response data, status codes, headers, parameters, and authentication workflows.
Do I need to provide API documentation?
API documentation such as Swagger, OpenAPI, or a Postman collection is helpful. If you do not have documentation, please provide the API base URL, endpoints, and expected behavior.
Can you test APIs that require authentication?
Yes. I can test APIs that use supported authentication methods such as API keys, Bearer tokens, and Basic Auth, provided you supply authorized test credentials.
Will I receive the Postman collection?
Yes, when included in your selected package. I can provide an organized Postman collection containing the tested requests and, where applicable, automated test scripts.
Can you automate API testing?
Yes. I can create reusable Postman test scripts for response validation, status codes, response data, and other agreed test conditions. Newman can also be used to run collections from the command line where applicable.

