SnelStart MCP Server and API by Cotlet for ChatGPT

dev.cotlet/snelstart

SnelStart small business bookkeeping MCP server: create sales invoice, add relation, book entry.

client:ChatGPT transport:streamable-http

Install SnelStart MCP Server and API by Cotlet in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://cotlet.dev/mcp/v1/snelstart/connect

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