How to Set Token in Postman Automatically

Steps to Automate Login Token in Postman

TYPE 1

// Parse the response //TOKEN add global variable create let responseData = pm.response.json(); console.log(responseData); // Check if token exists in the response if (responseData.data.token) { // Set token as a Collection Variable pm.collectionVariables.set("TOKEN", responseData.data.token); // Set token as a Global Variable (if required) pm.globals.set("TOKEN", responseData.data.token); console.log("Token saved successfully!"); }

TYPE 2

1. Create a Collection and Add a Login Request

• Open Postman and create a new collection.

• Inside the collection, create a new request (e.g., POST /login).

• Add the required login credentials (e.g., email and password) in the Body (raw JSON format).
  
  

// Parse the response { "email": "your-email@example.com", "password": "your-secure-password" }

2. Write a Pre-request Script to Automate Token Retrieval

• Go to the Pre-request Script tab of your collection.

• Add the following script to send a login request and store the token.

pm.request({ url: 'https://api.example.com/login', method: 'POST', header: { 'Content-Type': 'application/json' }, body: JSON.stringify({ email: 'your-email@example.com', password: 'your-secure-password' }) }, function (err, response) { if (err) { console.error(err); } else { let responseData = JSON.parse(response.body); pm.environment.set("authToken", responseData.token); } });

3. Set Authorization Token Dynamically in Requests

Now that the token is stored, use it in your API requests by adding it in the Headers or Authorization tab.

Using Headers

Go to any request inside the collection and add a new header:

Key: Authorization Value: Bearer {{authToken}}

Using Tests Script (Alternative Method)

Instead of setting the token manually, you can use a Test script to ensure it’s updated dynamically:

pm.test("Set auth header dynamically", function () { pm.request.headers.add({ key: "Authorization", value: "Bearer " + pm.environment.get("authToken") }); });

4. Automate Headers for All Requests

Instead of manually adding headers for each request, automate this by:

• Navigating to Collection -> Authorization.

• Selecting Bearer Token and using {{authToken}}.

• This applies the token to all requests inside the collection.