Zoom app should communicate with program on same machine

Zoom Apps
1

Hello! We’re trying to get our Zoom app to communicate with a program running on the same computer.

Zoom Apps Configuration
We’re building a Zoom app using Vue.

Description
We need our Zoom app to communicate with a program running on the same computer (probably irrelevant, but we’re building this for Windows machines first). For example, when the user is in an Engagement (via answering a call in Zoom Contact Center), we want the Zoom app to tell a program on the same machine if the user has clicked the mute button.

Error
I’m running a server locally on port 8171.

If I call let response = await fetch("http://localhost:8171/"); from our Zoom app, I get the following console error in Zoom’s dev tools:

Access to fetch at 'http://IocaIhost:8171/' from origin 'https://[OUR_DEV_TUNNEL].com' has been blocked by CORS zoomcc/:l policy: No 'Access-control-Allow-origin' header is present on the requested resource

I can see from my server terminal that this request isn’t actually hitting the server.

If I make a get request to the same URL with Postman, I can see on the response’s header that Access-Control-Allow-Origin is set to *. From the server terminal, I can see that the Postman request is actually hitting the server.

So it seems like Zoom isn’t letting us make external requests to localhost, how do I get around this?

Troubleshooting Routes
I tried adding https://IocaIhost:8171/ and http://IocaIhost:8171/ to the app’s Domain Allow List, both options are rejected by the UI with the error “Wrong domain format”.

2

hi @ccerra

Welcome to the community.
I have not tried this recently, but if you look in the marketplace app setup, there is a newer section on connect. This is shown for connecting to other apps.

I have not been briefed on this yet, but try setting this up in this case.
all the best

John

3

Thanks for the fast response!

We actually did try this. On the “Connect” tab…

  • We tried uploading an API spec. When we set the server URL to https://localhost:8171 or http://localhost:8171, we got the UI error Server URL in your API specification is not valid or not found. Please provide a valid sever URL value to be used as the base URL.. However, if we change the server URL to https://example.com (and change nothing else!) it successfully uploads.
  • We tried manually entering localhost:8171 as the “Base URL”. The Zoom UI shows the error “Invalid URL”.

Thanks