Aarven for ChatGPT

ch.aarven/aarven

Swiss accounting (CHF, VAT/MWST): balance sheet, P&L, VAT returns and draft bookings.

client:ChatGPT transport:streamable-http

Install Aarven in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://aarven.ch/mcp

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