Due Date for ChatGPT

com.gumballtools/due-date

Estimate a due date from LMP, conception, or ultrasound, with ACOG redating rules.

client:ChatGPT transport:streamable-http tools:1

Install Due Date in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://due-date.gumballtools.com/api/mcp

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