How do I Identify client machines

Hi ThingWorx Community,

I'm working on a ThingWorx Mashup and need to uniquely identify the client machine that is accessing the mashup. The goal is to know which specific PC/workstation is running the mashup at any given time.

I've explored a few approaches but hit limitations due to the browser sandbox and the separation between client-side (mashup) and server-side (JavaScript services). I'm hoping someone has solved this or can suggest a better approach.

What I've Tried

• Client IP Address (CurrentSessionInfo.GetCurrentUserSessionInfo()) — This works, but the IP address can change due to DHCP, VPN, or NAT/proxy, so it's not a reliable unique identifier.
• URLSearchParams / window.location in a server-side service — This doesn't work because ThingWorx JavaScript services run on the Rhino engine (server-side), which has no access to browser APIs.

What I'd Like to Do (Any of These Would Work)

1. Read an environment variable from the client machine (e.g., %COMPUTERNAME% on Windows) directly from the mashup or a service.

2. Read a local file on the client machine (e.g., C:\config\machine-id.txt) that contains a unique machine identifier.

3. Read the computer name / hostname of the client machine .

My Environment

• ThingWorx version: 9.6.0
• Client machines: Windows 10/11 PCs on a corporate network

Questions for the Community

1. Is there any way for a ThingWorx Mashup (or a custom widget/extension) to read the client machine's hostname or environment variables?

2. Is there a custom mashup extension or widget that can access local system information (hostname, environment variables, etc.)?

What I'm Considering as Workarounds

• A local HTTP service on each client that exposes the hostname on http://localhost:5111/, which the mashup calls on load.

Any guidance, examples, or pointers to extensions/documentation would be greatly appreciated.

Thank you!