Számlázz.hu MCP Server and API by Cotlet for ChatGPT

dev.cotlet/szamlazz-hu

Számlázz.hu hungarian business invoicing MCP server: issue invoice, cancel invoice, issue receipt.

client:ChatGPT transport:streamable-http

Install Számlázz.hu MCP Server and API by Cotlet in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://cotlet.dev/mcp/v1/szamlazz-hu/connect

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