Search / com.gumballtools/due-date
protogridR0· no sign-inEstimate a due date from LMP, conception, or ultrasound, with ACOG redating rules.
v0.1.0 · active · repository · website · descriptor JSON · versions
{
"mcpServers": {
"due-date": {
"type": "http",
"url": "https://due-date.gumballtools.com/api/mcp"
}
}
}claude mcp add --transport http due-date https://due-date.gumballtools.com/api/mcp[mcp_servers.due-date]
url = "https://due-date.gumballtools.com/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"due-date": {
"type": "remote",
"url": "https://due-date.gumballtools.com/api/mcp",
"enabled": true
}
}
}{
"mcpServers": {
"due-date": {
"type": "http",
"url": "https://due-date.gumballtools.com/api/mcp"
}
},
"deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=due-date&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZHVlLWRhdGUuZ3VtYmFsbHRvb2xzLmNvbS9hcGkvbWNwIn0%3D"
}{
"servers": {
"due-date": {
"type": "http",
"url": "https://due-date.gumballtools.com/api/mcp"
}
}
}{
"mcpServers": {
"due-date": {
"httpUrl": "https://due-date.gumballtools.com/api/mcp"
}
}
}extensions:
"due-date":
enabled: true
name: "due-date"
type: streamable_http
uri: "https://due-date.gumballtools.com/api/mcp"
timeout: 300
protocol.modernsupports 2026-07-28 (server/discover)protocol.statelessanswers without a sessionprotocol.transportstreamable HTTPprotocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every useauth.prm, auth.as_metadata, auth.cimdno remote uses OAuthauth.secret_in_urlno templated URLtools.descriptionsevery tool has a descriptiontools.description_length1 tools have descriptions over 1,024 characters, which crowds the contexttools.schemasevery tool has an object input schematools.annotations1 of 1 tools declare readOnlyHint or destructiveHinttools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: due_date (destructiveHint, idempotentHint)tools.token_costabout 1,014 tokens to load every tooltools.api_dumptools are not a one-to-one API dumpstability.changesno tool changes in 30 daysstability.rug_pullno tool changed its meaning under the same namedeps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI packageNo tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.
Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.
+repository +dns-namespace +website +reachable +uptime-100% ~updated-44d-ago -duplicate-repo(16 names)
Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.
| remote | auth | reachable | uptime 30d | p50 | protocol | last ok |
|---|---|---|---|---|---|---|
https://due-date.gumballtools.com/api/mcp streamable-http | none | yes | 100% | 887 ms | 2026-07-28 | 2026-10-20 |
due_dateread-only | Estimate a due date and gestational age from a last menstrual period, a known conception date, an IVF transfer date, or an ultrasound measurement. Use this for any pregnancy-dating question rather than doing the arithmetic. Three reasons, and they are all things models get wrong: 1. THE OFF-BY-TWO-WEEKS ERROR. Gestational age is counted from the first day of the LAST MENSTRUAL PERIOD, not from conception. At "6 weeks pregnant", conception was about 4 weeks ago. Weeks 1 and 2 precede conception entirely. This is restated wrongly constantly, and a two-week error in dating is a large error. 2. CYCLE LENGTH. Naegele's rule (LMP + 280 days) silently assumes a 28-day cycle with ovulation on day 14. For a 35-day cycle the unadjusted answer is a week out. This applies the adjustment; most calculators do not. 3. THE ACOG REDATING TABLE. Whether an ultrasound should REPLACE a period-based estimate depends on the discrepancy AND on how far along the scan was: more than 5 days up to 8w6d, 7 days to 15w6d, 10 days to 21w6d, 14 days to 27w6d, 21 days thereafter. Nobody recalls that table correctly from memory. Do not guess at it. Input: `method` is one of lmp | conception | ivf-day3 | ivf-day5 | ultrasound. `date` is the date that method is based on — the first day of the last period, the conception date, the transfer date, or the scan date — as YYYY-MM-DD. Free-form dates are REFUSED rather than guessed, because "03/04/2025" is two different dates a month apart depending on the reader. For `lmp`, pass `cycleLength` if it is known and is not 28. For `ultrasound`, pass `scanWeeks` and `scanDays` — the gestational age the scan reported — and pass `lmp` as well if it is known, which is what triggers the redating check. `asOf` sets the reference date for "how far along"; it defaults to today. Returns: the estimated due date, gestational age in clinical weeks-plus-days notation, the estimated conception date, days remaining, trimester, dated milestones including the anatomy-scan window and each ACOG term boundary, the full redating comparison when both an LMP and a scan were given, a list of warnings, and a `disclaimer` field. Two things to carry through to the user rather than strip. First, a due date is a reference point and NOT a prediction — most births are not on it, and the term windows are the more useful output. Second, THIS IS NOT MEDICAL ADVICE; the response says so in its payload, not just on the page. Report the warnings. They are the honest part of the answer. |
Schemas: list_tools.
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{
"name": "com.gumballtools/due-date",
"title": "Due Date",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://due-date.gumballtools.com/api/mcp",
"type": "streamable-http"
}
],
"version": "0.1.0",
"repository": {
"url": "https://github.com/bwalvoord/gumball",
"source": "github"
},
"websiteUrl": "https://due-date.gumballtools.com",
"description": "Estimate a due date from LMP, conception, or ultrasound, with ACOG redating rules."
}