IMW Invoice for ChatGPT

management.independent/imw-invoice

Invoicing, time tracking, and billing for freelancers and small firms, run in plain language.

client:ChatGPT transport:streamable-http

Install IMW Invoice in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://invoice.independent.management/mcp

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