OAuth 2.0 flow in Postman - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is OAuth 2.0 used for?

OAuth 2.0 is a way to let apps access your information on other services without sharing your password. It acts like a permission slip.

beginner

Name the four main OAuth 2.0 roles.

1. Resource Owner (user)<br>2. Client (app)<br>3. Authorization Server (gives tokens)<br>4. Resource Server (holds data)

beginner

What is an access token in OAuth 2.0?

An access token is like a temporary key that lets the client app access the user's data on the resource server.

intermediate

Describe the Authorization Code flow in OAuth 2.0.

The client app asks the user to log in and get an authorization code. Then the app exchanges this code for an access token to access data securely.

beginner

Why use Postman for testing OAuth 2.0 flows?

Postman helps you simulate OAuth 2.0 steps easily, like getting tokens and calling APIs, without writing code.

Which OAuth 2.0 role is the user who owns the data?

A Resource Owner

B Client

C Authorization Server

D Resource Server

The Resource Owner is the user who owns the data and grants permission.

In OAuth 2.0, what does the client receive after exchanging the authorization code?

A Refresh token

B Access token

C Authorization code again

D User password

The client exchanges the authorization code for an access token to access resources.

Which OAuth 2.0 flow is best for server-side applications?

A Implicit flow

B Authorization Code flow

C Client Credentials flow

D Resource Owner Password Credentials flow

Authorization Code flow is secure and suitable for server-side apps.

What is the main purpose of the Authorization Server?

A Store user data

B Issue tokens

C Run the client app

D Display user interface

The Authorization Server issues access tokens after user approval.

In Postman, which tab helps you set up OAuth 2.0 authentication?

A Headers

B Body

C Authorization

D Pre-request Script

The Authorization tab in Postman lets you configure OAuth 2.0 easily.

Explain the OAuth 2.0 Authorization Code flow step-by-step as if teaching a friend.

Think of it like getting a ticket first, then exchanging it for a key.

Describe how you would test an OAuth 2.0 flow using Postman.

Postman helps you do all OAuth steps without coding.