Real-Time POS Inventory Sync

I need a small middleware service that can pull live inventory levels from a third-party POS platform (it’s not Shopify, Square, or Lightspeed—so please be comfortable discovering or reverse-engineering a different API or database schema). The single purpose is to keep my own server in sync with whatever is on the POS in real time.

Here’s what the job looks like from my side:

• Goal
Every sale or stock adjustment in the store should trigger, or at least very quickly reflect, a quantity update on my server so the numbers stay accurate across all of my channels.

• Flow I’m picturing
1. Authenticate to the POS (REST, GraphQL, WebSocket, direct DB—whatever the platform offers).
2. Detect inventory changes continuously—ideally through a webhook or streaming endpoint; polling is acceptable if you can keep the lag minimal.
3. Transform the payload into a clean JSON object.
4. POST that JSON to a simple endpoint I’ll provide.

• Deliverable : Script which identify the available inventory after each sale - create a pull with live stock - give me that in excel or push that to my server.

POS SETUP FILE: https://limewire.com/d/n5qcA#LdEToAnLhY