About Due Date
Estimate a due date from LMP, conception, or ultrasound, with ACOG redating rules
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://due-date.gumballtools.com/api/mcpclaude mcp add --transport http com-gumballtools-due-date https://due-date.gumballtools.com/api/mcp{"mcpServers":{"com-gumballtools-due-date":{"type":"http","url":"https://due-date.gumballtools.com/api/mcp"}}}Open in Cursor{"servers":{"com-gumballtools-due-date":{"type":"http","url":"https://due-date.gumballtools.com/api/mcp"}}}Open in VS Code{"mcpServers":{"com-gumballtools-due-date":{"type":"http","url":"https://due-date.gumballtools.com/api/mcp"}}}{"mcpServers":{"com-gumballtools-due-date":{"serverUrl":"https://due-date.gumballtools.com/api/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
1| Parameter | Type | Required | Description |
|---|---|---|---|
| lmp | string | No | For `ultrasound`: the last menstrual period, YYYY-MM-DD. Supplying it is what runs the ACOG Committee Opinion 700 redating check — without it the two estimates cannot be compared and the tool says so. |
| asOf | string | No | YYYY-MM-DD reference date for "how far along", default today. Set it when the user is asking about a date other than now. |
| date | string | Yes | YYYY-MM-DD. The date the method is based on: the FIRST DAY of the last menstrual period, the conception date, the IVF transfer date, or the date of the scan. Free-form dates are REFUSED, not guessed. |
| method | enum | Yes | How the pregnancy is being dated. Use `lmp` unless the user has given you a conception date, a transfer date, or a scan measurement — `lmp` is what people usually know.lmp | conception | ivf-day3 | ivf-day5 | ultrasound |
| scanDays | number | No | For `ultrasound`: the DAYS part, 0-6. Scan reports use a "12w3d" format. |
| scanWeeks | number | No | For `ultrasound`: the WEEKS part of the gestational age the scan reported. |
| cycleLength | number | No | Cycle length in days, 20-45, default 28. Only affects `lmp`. Worth asking the user for: Naegele's rule assumes 28 days, and a 35-day cycle moves the estimate a week later. |
Details
The maintainer has not added details yet. Check the README in the repository.
Comments
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