FoxyInvoice for ChatGPT

io.github.seolith-llc/foxyinvoice

Invoicing for AI assistants: clients, quotes, invoices with computed tax, email send, card payments.

client:ChatGPT transport:streamable-http

Install FoxyInvoice in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://foxyinvoice.com/api/v1/mcp

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