EveryCalc for ChatGPT

io.github.xoyabunx/everycalc

8 free finance calculators as MCP tools: mortgage, refinance, loans, interest, salary, tips.

client:ChatGPT transport:streamable-http tools:8

Install EveryCalc in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://everycalc.xyz/mcp

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