NL Tax Calculator for ChatGPT

nl.nltaxcalculator/dutch-tax

Dutch tax calculators: net salary, 30% ruling, Box 3, visa salary norms, job loss, US-Dutch tax.

client:ChatGPT transport:streamable-http tools:7

Install NL Tax Calculator in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://nltaxcalculator.nl/dutch-tax/api/mcp

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