Webhook + monitor + sendRequest to localhost failing

The goal

I want to save PagerDuty webhook data to file.

My setup

I followed the Webhook API tutorial Postman Webhooks | Postman Level Up
And it works

I wanted to have my webhook payload written to the file, so I followed Write Responses To File example
And it works in separation.

Then I combined both and wanted the monitor to call my http://localhost:3000/write, but found it’s impossible due to Postman Monitors Test Failed.

So I wanted to outsmart the system, and instead of calling http://localhost:3000/write directly, I’m calling https://postman-echo.com/post (which is publically accessible), and I wrote a test to make the request to my localhost.

const postRequest = {
  url: 'http://localhost:3000/write',
  method: 'POST',
  header: {
    'Content-Type': 'application/json'
  body: {
    "uniqueIdentifier": true,
    "requestName": "pagerduty-listaner",
    "responseData": webhookData

// Sending request
console.log("Sending request", postRequest)
pm.sendRequest(postRequest, (err, res) => {
    console.log(err ? err : res.json())

As you can guess, it did not work, and I’m receiving
Error: NETERR: getaddrinfo ENOTFOUND localhost

Any suggestions?

I’ll be trying AWS Gateway + Lambda + S3 tomorrow if no luck with Postman webhook. However, it’s a pretty heavy setup for a simple task I have :man_shrugging:t2:

Details (like screenshots)