Invoices to Spreadsheets for ChatGPT

com.invoicestospreadsheets/invoice-spreadsheets

Put invoices into a checked Excel workbook: arithmetic, missing fields and duplicates flagged.

client:ChatGPT transport:streamable-http tools:3

Install Invoices to Spreadsheets in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://invoicestospreadsheets.com/api/mcp

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