Using Postman to access OAuth 2.0 Google APIs

postman oauth2 google
how to get access token google api
google.oauth2 python
google oauth scopes
google oauth playground
postman cloud api
google authenticator api
google login api

I am trying to access Proximity Google API using Postman chrome app. I have followed tutorials on postman and google dev website but I'm still getting 401 error message.

What am I doing?

  • Step 1 - Enable Proximity API:

In order to use Proximity API, it has to be first enabled in Google Dev console. Using this tutorial I have enabled support for Proximity API for my project

  • Step 2 - Get the credentials:

According to this tutorial, I need to get client ID and secret. This is where I am confused. Credentials->Add credentials->OAuth2.0 client ID->select Chrome App radio button (since I am using Postman)->enter last part of Postman's Chrome Web store URL [which is fhbjgbiflinjbdggehcddcbncdddomop]->hit create button These steps will only generate a client ID, not a I doing something wrong?

From the Google Dev console, one can download an JSON file which has client id, auth URI and Token URI

I downloaded this but this is of little help if I am using Postman. I am guessing this JSON file is something that can be included in a JS application.

  • Step 3 - Use Postman to test the API

What am I getting?

And, once I click on the debug URL, I see the following screen

Using Postman to access OAuth 2.0 Google APIs, Any application that uses OAuth 2.0 to access Google APIs must have If you are using Google APIs client library for JavaScript to handle the OAuth 2.0 flow,  oauth-2.0, google-api, google-api-client, postman asked by Sai on 03:24PM - 18 Aug 15 UTC I was able to get to the point where it authenticated me (using OAUTH2.0), but then I got the message:

The best way I found so far is to go to the Oauth playground here:

  1. Select the relevant google api category, and then select the scope inside that category in the UI.
  2. Get the authorization code by clicking "authorize API" blue button. Exchange authorization code for token by clicking the blue button.
  3. Store the OAuth2 token and use it as shown below.

In the HTTP header for the REST API request, add: "Authorization: Bearer ". Here, Authorization is the key, and "Bearer ". For example: "Authorization: Bearer za29.KluqA3vRtZChWfJDabcdefghijklmnopqrstuvwxyz6nAZ0y6ElzDT3yH3MT5"

Make your first API calls, Using Postman to access OAuth 2.0 Google APIs. oauth-2.0, google-api, google-​api-client, postman. asked by Sai on 03:24PM - 18 Aug 15  Since Google APIs use OAuth2 for Authentication, we cannot simply use Email and Password to access the API using Postman. Therefore, Postman requires a secure Authentication token to access the

OAuth 2.0 for Client-side Web Applications, For reasons if you are not using the Google API-Explorer and if you are using POSTMAN client to access Google Cloud API's then you would face with an an OAuth 2.0 client ID; Authorize the redirect URL; Login to Postman  OAuth 2.0 Authorization with Postman . OAuth 2.0 Authorization with Postman? In this tutorial we will be using Postman to see the workflow of OAuth 2.0. For this, we will use imgur website API which is an online image sharing community. You can also use any other company’s API which uses OAuth 2 flow.

I figured out that I was not generating Credentials for the right app type. If you're using Postman to test Google oAuth 2 APIs, select Credentials -> Add credentials -> OAuth2.0 client ID -> Web Application.

Calling Google APIs using OAUTH2.0 - Help, Postman is a Google Chrome application for testing API calls. Finally, we need to set up OAuth 2.0 authorization to use API calls. Click Get access token. If you're using Postman to test Google oAuth 2 APIs, select Credentials -> Add credentials -> OAuth2.0 client ID -> Web Application. This is an old question, but it has no chosen answer, and I just solved this problem myself.

This is an old question, but it has no chosen answer, and I just solved this problem myself. Here's my solution:

  1. Make sure you are set up to work with your Google API in the first place. See Google's list of prerequisites. I was working with Google My Business, so I also went through it's Get Started process.

  2. In the OAuth 2.0 playground, Step 1 requires you to select which API you want to authenticate. Select or input as applicable for your case (in my case for Google My Business, I had to input into the "Input your own scopes" input field). Note: this is the same as what's described in step 6 of the "Make a simple HTTP request" section of the Get Started guide.

  3. Assuming successful authentication, you should get an "Access token" returned in the "Step 1's result" step in the OAuth playground. Copy this token to your clipboard.

  4. Open Postman and open whichever collection you want as necessary.

  5. In Postman, make sure "GET" is selected as the request type, and click on the "Authorization" tab below the request type drop-down.

  6. In the Authorization "TYPE" dropdown menu, select "Bearer Token"

  7. Paste your previously copied "Access Token" which you copied from the OAuth playground into the "Token" field which displays in Postman.

  8. Almost there! To test if things work, put into the main URL input bar in Postman and click the send button. You should get a JSON list of accounts back in the response that looks something like the following:

        "accounts": [
                "name": "accounts/REDACTED",
                "accountName": "REDACTED",
                "type": "PERSONAL",
                "state": {
                    "status": "UNVERIFIED"
                "name": "accounts/REDACTED",
                "accountName": "REDACTED",
                "type": "LOCATION_GROUP",
                "role": "OWNER",
                "state": {
                    "status": "UNVERIFIED"
                "permissionLevel": "OWNER_LEVEL"

Google Cloud API with POSTMAN - Nataraj P, Google Says Postman is unsecure and there for will not allow API Access Token URL: Client ID:  Note: Use of Google's implementation of OAuth 2.0 is governed by the OAuth 2.0 Policies. Google APIs use the OAuth 2.0 protocol for authentication and authorization. Google supports common OAuth 2.0 scenarios such as those for web server, client-side, installed, and limited-input device applications.

Use Postman to test API calls, If you are using the Firebase Admin SDK to send messages, the library An API key will only work to authorize requests to the legacy API. A service account JSON file; A short-lived OAuth 2.0 access token derived from a service account. This document explains how to implement OAuth 2.0 authorization to access Google APIs from a JavaScript web application. OAuth 2.0 allows users to share specific data with an application while keeping their usernames, passwords, and other information private.

Google Says Postman is unsecure and there for will not allow API , Working with Google Identity OAuth 2.0 tokens. You can generate an access token by using a service account with a Google API Client Library or  With OAuth 2.0, you first retrieve an access token for the API, then use that token to authenticate future requests. Accessing data via the OAuth 2.0 flow varies greatly between API service providers, but typically involves a few requests back and forth between client application, user, and API. An example OAuth 2.0 flow could run as follows:

Authorize send requests - Firebase, Google gives us an access to lots of welfare with the Google API. The API enable to use Google services from our own applications. For example our apps can exchange data with google drive, use