Postman Mini-Project - Token-based Authentication Flow in Postman

Learn to implement a complete token-based authentication workflow in this hands-on tutorial that demonstrates how to extract values from API responses, store them in environment variables, and reuse them in subsequent requests. Master the process of creating a POST login request that retrieves an authentication token, automatically storing it in an environment variable using post-response scripts, and then utilizing that token in a GET request to access protected data. Discover how to set up Postman environments and variables, write test scripts to extract tokens from JSON responses, implement request chaining by using extracted values in headers, and add pre-request scripts for additional functionality. Follow along as you simulate a real-world enterprise API authentication scenario using the reqres.in API, creating a login request with email and password credentials, capturing the returned token dynamically, and using it as a Bearer token for authorized API calls. Explore essential debugging techniques using console.log statements and the Postman Console, learn to run complete authentication flows using Collection Runner, and understand common pitfalls like forgetting to select environments or hardcoding sensitive values. Gain practical experience with JSON response parsing, environment variable management, header configuration for authenticated requests, and automated token handling that mirrors real-world enterprise API security patterns used with JWT, Bearer, and OAuth tokens.