Postman Pre-Request: How to get Auth Token at Collection level?

Prerequisite:

You need latest Postman application installed.

You can download Postman application from here.

Steps:

• Create a new collection.
• Open the collection and click on Pre-request Script.
• Paste below code there:

pm.sendRequest({

url: [AUTH_TOKEN_URL],

method: 'POST',

header: {

'Content-Type': 'application/x-www-form-urlencoded',

},

body: {

mode: 'urlencoded',

urlencoded: [

{ key: "client_id", value: [CLIENT_ID_VALUE] },

{ key: "client_secret", value: [CLIENT_SECRET_VALUE] },

{ key: "resource", value: [RESOURCE_VALUE] },

{ key: "grant_type", value: [GRANT_TYPE_VALUE] }

]

}

}, function (err, response) {

if (null != err) {

const jsonResponse = response.json();

// Save token to env variable.

pm.environment.set('env_auth_token', jsonResponse.token);

} else {

console.log("Cannot fetch Auth token");

pm.environment.set('env_auth_token', '');

}

});

• Replace all values as per your requirements.