Netto for ChatGPT

so.netto/netto

Accounting and invoicing for freelancers (ZZP) in the Netherlands: invoices, expenses, VAT (BTW).

client:ChatGPT transport:streamable-http

Install Netto in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://netto.so/api/mcp

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