Fin3000 for ChatGPT

com.fin3000/fin3000

Accounting for German SMBs: invoices, clients, bank transactions, journal entries, VAT.

client:ChatGPT transport:streamable-http

Install Fin3000 in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://api.fin3000.com/mcp

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