Tosca for API Testing: A Step-by-Step Tutorial
🔍 Tosca for API Testing: A Step-by-Step Tutorial
Tosca by Tricentis is a popular automation tool used for testing APIs, web, mobile, and more — all without writing code. It provides a low-code/no-code interface and supports SOAP and REST APIs.
🧱 Before You Begin
✅ Prerequisites:
Tosca Commander installed
Basic understanding of API (REST or SOAP)
A sample API to test (e.g., https://reqres.in/api/users)
🚀 Step-by-Step Guide
✅ Step 1: Create a New Tosca Workspace
Open Tosca Commander
Create a new workspace or open an existing one
Select a Project Root (like API_Testing_Tutorial)
✅ Step 2: Scan the API
Go to the API Scan tool (you can launch it from Tosca or standalone)
Click + Add API Connection
Choose REST or SOAP
Enter the base URL (e.g., https://reqres.in)
Browse available endpoints and select one to scan
Click Scan to import the API definition
Save and return to Tosca Commander
✅ Step 3: Create an API Test Case
In Tosca Commander, right-click on a Module folder
→ Select Create TestCase
Drag the scanned API module (like GET /api/users) into the TestCase
A test step will be created with request parameters and headers
✅ Step 4: Configure the API Request
In the test step, fill in the required values:
For GET requests: Add query parameters (like page=2)
For POST requests: Add JSON body under Request Payload
Set necessary headers like Content-Type: application/json
✅ Step 5: Add Validations (Verifications)
To validate the response:
Go to the Response section
Right-click on the response fields (like status, name, id)
→ Select Verify
Enter expected values (e.g., status = 200 or first_name = Janet)
✅ Step 6: Run the API Test Case
Right-click on the TestCase
→ Select Run
Tosca will execute the API call and show Pass/Fail status
View the Test Results for response time, actual data, and any errors
🧪 Example: Test a GET API Endpoint
Endpoint: GET https://reqres.in/api/users?page=2
Steps in Tosca:
Method: GET
Query Param: page = 2
Expected status: 200
Expected response field: data[0].first_name = Michael
✅ Run the test and validate that the data matches.
🧰 Bonus Features in Tosca API Testing
Feature What It Does
Chained Requests Use output of one API as input to another
Test Data Service Store reusable test data
Authentication Supports OAuth, Basic Auth, Bearer Tokens
Environment Management Easily switch between staging, QA, and prod URLs
📌 Best Practices
Use Templates for repeatable test steps
Organize tests by API type or module
Use Data-Driven Testing to test multiple inputs
Group tests into Test Case folders for clarity
✅ Summary
Step Action
1️⃣ Scan the API using Tosca API Scan
2️⃣ Create a TestCase
3️⃣ Add and configure API request
4️⃣ Add verifications
5️⃣ Run and validate results
Learn Tosca Training in Hyderabad
Read More
Automating Web Applications with Tosca
Tosca Test Data Management Basics
Tosca ScratchBook vs ExecutionList: What’s the Difference?
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