I needed a way to move data from NetSuite to Magento. Here is a simple example that creates an attribute set in Magento. This example runs in a NetSuite debugger session. It is written in SuiteScript 2.1.
To create your token in Magento. Login in as admin. Go to
System >> Integrations >> Add New Integration
Once you’ve added your integration, Magento will create an Access Token. This is your Bearer Token.

Use the Bearer Token in your header. Refer to the Magento 2 Admin REST endpoint’s documentation to correctly build the body. Here is example code.
require(['N/https'],
(https) => {
var header = {
'Authorization': 'Bearer [your token here]',
'Accept': 'application/json',
'Content-Type': 'application/json; charset=utf-8'
};
var body = JSON.stringify(
{
"attributeSet": {
"attribute_set_name": "[Your attribute set name here]"
},
"skeletonId": 4
}
);
https.post.promise({
url: encodeURI('https://[Your Magento base domain here]/rest/default/V1/products/attribute-sets'),
body: body,
headers: header
})
.then(function (response) {
log.debug({
title: 'Response',
details: response
});
})
.catch(function onRejected(reason) {
log.debug({
title: 'Invalid Request: ',
details: reason
});
})
}
)