Tally by Backspin Labs for ChatGPT

com.backspinlabs/tally

Ask about a Lightspeed Retail (R-Series) shop's sales, stock, customers, and work orders.

client:ChatGPT transport:streamable-http

Install Tally by Backspin Labs in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://tally.backspinlabs.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs