How to call azure graph api using postman - azure

Question

I am trying to call graph api to get user information. I am using postman to get the token first and then using that token trying to make a request to graph api
I get the token with below post request and with 4 key values for grant_type, client_id, client_secret and resource.
https://login.microsoftonline.com/{{tenantid}}/oauth2/token
The response is
{
"token_type": "Bearer",
"expires_in": "3600",
"ext_expires_in": "3600",
"expires_on": "1555583717",
"not_before": "1555579817",
"resource": "https://management.azure.com/",
"access_token": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxNiIsIng1dCI6IkhCeGw5bUFlNmd4YXZDa2NvT1UyVEhzRE5hMCIsImtpZCI6IkhCeGw5bUFlNmd4YXZDa2NvT1UyVEhzRE5hMCJ9.yyyyyyyLTBjYjZmZDNiM2UwNCIsInRpZCI6IjM3NGY4MDI2LTdiNTQtNGEzYS1iODdkLTMyOGZhMjZlYzEwZCIsInV0aSI6ImVWTWdDbkU4QWtPVXY3bFQ2QlRSQUEiLCJ2ZXIiOiIxLjAifQ.kxHCm2oGsuUvlXbncXQe7Wb0l-ZENqqG9_P_co0SPdYA3GkhFKDi6sQ7OaaHeDs4S6kN0-Diw5qBOzmFipSA5EUorA7UDbJfiSVVlaEzLY3IX_4WSV4Exc-kLOaX0j7KgvsEQbc5TEk8e4dPfokG98gGPmhy19xLyV84lX1v6DzgXINzP8gPkGmqR_J7iVFQ3m-Y18dHlxDpqQMTKxvQGnrsa7rflyxGUwEwwFZJH8t5NRv_mjQOIQBuosfhMAH88l-J8zEmXWLFqEzFBBWrz9UxT6X-XxRQZW4WBSoHTKd3vuBcEo6kUclfe4G7COOvI4zG0-j10mmGziKlzjNVMw"
}
Then I use the token to make GET request
https://graph.windows.net/{{company}}/users/{{email}}?api-version=1.6
and header
Key Value
Authorization Bearer {{token}}
but it fails with this error
{
"odata.error": {
"code": "Authentication_MissingOrMalformed",
"message": {
"lang": "en",
"value": "Access Token missing or malformed."
}
}
}
What is the correct way to make a request to graph api ?

Answer 1

Updated answer according to your case
Okay I am showing the step from the beginning. Make sure you have complete following step exactly.
Step:1 : Application Registration
Go to your azure portal and click on azure active directory. Now click on App registrations and Enter a name for your app. Make sure you have select Web app / API as application type. Put any Sign on URL it does not have any impact though.
See the screen shot below:
Step:2 Application Configuration
Configure your application setting by clicking on settings option. Copy the Application Id which is your client ID. Generate your client_secret on Key menu. Now click on Required permission option and click on Add at new window. Choose Select an API choose Microsoft Graph Then Select it.
See the below screen shot
So your azure portal configuration is all set.
Step:3 Token Access Flow
For getting token I am using OAuth 2.0 Client Credentials Grant Flow. Let fire up POSTMAN Enter your token endpoint your like below:
https://login.microsoftonline.com/`YourTenantNameOrID`.onmicrosoft.com/oauth2/token
Enter following data in right format:
grant_type:client_credentials
client_id:Your Portal Application ID
client_secret:Your application Key
resource:https://graph.microsoft.com/
Note: I am using Microsoft Graph API so resource has chosen
//graph.microsoft.com/
See the screen shot for more details
Step: 4 Check Claims Of your Token
You can make sure your token contains required information by validating it claims on JWT. You can use https://jwt.io/ to validate your token.
See the picture of claims below:
Step:5 Access Your Microsoft Graph API Resource
Define your Microsoft Graph API resource URL
For example : https://graph.microsoft.com/v1.0/users
Select your API http verb
Select Your Token Type to Bearer Token
Enter your token on left token text box
You are done click send and check your response as expected. See the screen shot for details.
Request Format:
Response From API:
Note: Make sure you have resource access permission unless you would get access denied error.
For more information you could take a look here
If you have any more confusion feel free to ask in comment line. Thank you and Happy coding!