How to make calls to Twitter API using Postman client

I know this is old, but in case anyone is still facing this issue, the following steps worked for me:

1. In Authorization tab, select OAuth 1.0
2. Enter your consumer key, consumer secret, access token and access token secret
3. Enable “Add params to header” and “Auto add parameters”
4. Send the request

I hope that helps.

Postman creates 6 character nonce, Twitter needs 32-character Nonce. So you can use any random value, I used ABCDEFGHIJKLMNOPQRSTUVWXYZ123456 (length=32)

Juliana Chahoud's answer updated for 2018:

The add authorization data has been moved to the left column and requires you to select the drop down menu to change it to "Request Headers".