How to Use Postman’s Postbot for AI-Powered API Testing

Introduction

Postman’s Postbot, an AI-powered assistant, revolutionizes this process by automating and enhancing API testing using intelligent, context-aware suggestions.

Postbot AI assistant features:

1. Test Script Generation
2. Fixed Broken Tests
3. Expert Debugging
4. Intuitive Prompt Response
5. Smart Suggestions
6. Visualise Responses
7. Add More Tests
8. Save a field from response
9. API Documentation
10. Test Suite Collection
11. Get Help

1. Test Script Generation

Postbot is an intelligent assistant in Postman that helps you generate automated test scripts for your API endpoints with ease.

Steps to generate Test Scripts with Postbot:

• Open Postman
• Navigate to Script Tab > Click on "Ask PostBot" icon
• Type a natural language prompt like: "Test if the response status is 200"; "Verify whether the response body has the attribute "token"; "Validate that the array length is 10"; "Ensure the response time is under 500ms"      
• Postbot automatically generates the relevant JavaScript code for your test case and inserts it directly into your test script area, ready for review and execution.
• Click “Save” and Run the Request: Postbot’s script will run automatically each time you send the request. 

2. Fixed Broken Tests

Postbot AI is a smart assistant in Postman that not only helps generate test scripts—but also diagnoses and fixes broken or incorrect syntax. When test assertions fail, Postbot steps in to identify syntax or logic issues and suggest corrections, saving valuable debugging time.

Steps to Auto-Fix Script Errors with Postbot:

• Open Postman
• Navigate to "Script" tab and write any script (intentionally include a syntax error to test).
• Run the request by clicking Send. If there's a syntax or runtime error, Postman will highlight it in the test results area.
• Observe the “Fix Script” Icon. You’ll see a “Fix Script” button/icon next to the error message. This appears when Postbot detects issues it can resolve.
• Click on “Fix Script". Postbot will analyze the error and automatically suggest or apply a fix. You can review and accept the changes or modify them as needed.

3. Expert Debugging

Postbot is available to assist when unexpected errors occur during request execution. We can select 'What's wrong?' in the error message. Any issues that Postbot detects will be reported to you, along with potential fixes.

Expert Debugging by Postbot empowers developers and testers to:

• Diagnose failing test scripts
• Identify syntax errors and runtime issues
• Automatically fix broken test logic
• Understand what went wrong and why
• Receive step-by-step guidance on resolving complex issues

4. Intuitive Prompt Response

An intuitive prompt response refers to a system (like Postbot or any AI assistant) that can understand natural, user-friendly input and respond in a way that feels clear, relevant, and context-aware, even if the input is informal or non-technical.

An intuitive prompt response means you can type and get the output:

“Check if the response includes an email field and status is 200”

pm.test("Status is 200", () => {

  pm.response.to.have.status(200);

});

pm.test("Response has email", () => {

  const jsonData = pm.response.json();

  pm.expect(jsonData).to.have.property("email");

});

5. Smart Suggestions

Postman's Postbot uses a sophisticated artificial intelligence language model to provide intelligent, context-aware code recommendations right in the test editor,  

helping developers write effective API tests faster and with greater accuracy.

How Postbot Enhances Test Writing?

• Real- Time Code Suggestions: As developers begin typing test scripts in the Tests tab, Postbot proactively suggests common test behaviors, helping avoid boilerplate repetition and syntax errors.
• Response-Aware Completions: Postbot analyzes the live API response or any saved response examples to generate customized test suggestions that are tailored to the structure and content of the response.
• Function Name-Based Proposals
• Data-Driven Test Recommendations
• Boosts Productivity

6. Visualise Responses

We have option to see the results in more intuitive way which is more clear to understand.

• Visualise response as a table : Can see the response result in tabular form
• Visualise response as line chart : Can see the response result as line chart
• Visualise response as a bar chart : Can see the response result as bar chart

7. Add More Tests

Add more Test features helps users with some new testcases which would be relevant to current testing.

• Open any request in Postman.
• Navigate to the “Script” tab.
• Click on the “Add More Tests” button (usually found below the test editor).
• Choose from common test templates or use Postbot to generate custom tests
• You can ask in plain language (e.g., "Add a test to check if the response time is under 500ms").
• Click Insert to add the suggested test to your script area.

8. Save a Field From Response

You're calling an API, and you want to save a field from the response (e.g., token, userId, orderId) for reuse in:

• Another request
• Headers or body
• Conditional logic in tests

Steps to save a field from response:

• Send API request to get a valid response.
• Navigate to the “Script” tab under the request.
• Click “Ask Postbot”.
• Type a prompt like: "Save the Token field from the response to an environment variable"; "Extract userId and store it as a collection variable"
• Postbot will generate a script for you

9. API Documentation

Steps to create API documents:

• Open Postman and go to your Collection or a specific Request.
• Navigate to the Documentation section (either in the request pane or via the collection sidebar).
• Click “Ask Postbot” in the documentation field.
• Use natural prompts like:  “Write a detailed description of this GET request”; “List the headers and body of this API call in brief.”;  “Add usage examples with response format”; “Generate markdown documentation for this API”

Postbot will populate or enhance the documentation accordingly. You can review and edit before publishing.

10. Test Suite Collection

Steps to create a Test Suit Collection:

• Open Postman and go to your Collections tab.
• Click on an existing collection or create a new one.
• Click on the three-dot menu, next to the collection or folder name and then click on “Generate Tests with Postbot”.
• In the Postbot sidebar, type a prompt like: “Generate basic tests for all requests in this collection”; “Create a test suite to validate response status, body fields, and response time”; “Add error response validation for each request”

Postbot will:

• Add relevant tests to the Tests tab of each mentioned request
• Suggest test case names and logic
• Optionally handle parameterized test data (e.g., from CSV/JSON files) 

11. Get Help

When you're stuck, there's no need to leave Postman or search the web — Postbot is your in-app AI assistant, ready to help you with contextual, intelligent, and fast answers based on Postman's official Learning Center and trusted community sources.

• Expertly Curated Instructions: Postbot pulls relevant information from official documentation, tutorials, and FAQs to provide accurate and relevant support, right when you need it.
• No More Searching: Instead of jumping to external forums or search engines, simply ask Postbot your question directly inside Postman.
• Context-Aware Help: Whether you're writing tests, debugging scripts, or visualizing responses, Postbot understands your context and offers tailored help.

Conclusion

Postbot is more than just a code generator - it’s your AI test partner inside Postman. Whether you're building new APIs, maintaining old ones, or scaling test coverage across teams, Postbot transforms the way you approach API quality.

If you have any questions you can reach out our SharePoint Consulting team here.