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Postman pre-request script to automatically get a bearer token from Auth0 and save it for reuse
const echoPostRequest = {
url: 'https://<my url>',
method: 'POST',
header: 'Content-Type:application/json',
body: {
mode: 'application/json',
raw: JSON.stringify(
client_id:'<your client ID>',
client_secret:'<your client secret>',
audience:'<my audience>',
var getToken = true;
if (!pm.environment.get('accessTokenExpiry') ||
!pm.environment.get('currentAccessToken')) {
console.log('Token or expiry date are missing')
} else if (pm.environment.get('accessTokenExpiry') <= (new Date()).getTime()) {
console.log('Token is expired')
} else {
getToken = false;
console.log('Token and expiry date are all good');
if (getToken === true) {
pm.sendRequest(echoPostRequest, function (err, res) {
console.log(err ? err : res.json());
if (err === null) {
console.log('Saving the token and expiry date')
var responseJson = res.json();
pm.environment.set('currentAccessToken', responseJson.access_token)
var expiryDate = new Date();
expiryDate.setSeconds(expiryDate.getSeconds() + responseJson.expires_in);
pm.environment.set('accessTokenExpiry', expiryDate.getTime());
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