ChatGPT

Numeral MCP by usefulapi for ChatGPT

io.usefulapi/numeral

Calculate sales tax & VAT, record transactions and refunds, manage products and customers.

client:ChatGPT transport:streamable-http tools:11

Install Numeral MCP by usefulapi in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://numeral.usefulapi.io/mcp

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

What ChatGPT can do once it is connected

Numeral MCP by usefulapi in other clients

Numeral MCP by usefulapi MCP server