# BabyData pregnancy calculators

> UK due date, ovulation, pregnancy weeks and maternity pay calculators. Not medical advice.

- name: uk.co.babydata/pregnancy-calculators
- version: 1.0.1
- connection class: R0 (autonomous)
- trust: 82/100 flags: no-repository
- quality: 91/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/uk.co.babydata%2Fpregnancy-calculators
- tools: https://api.protogrid.dev/v1/servers/uk.co.babydata%2Fpregnancy-calculators/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "pregnancy-calculators": {
      "type": "http",
      "url": "https://babydata.co.uk/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 98
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-95% +updated-4d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 91/100 (strong)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 710 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 4 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 4, about 710 tokens to load them all
- tool set hash: 217500d35c69ad09934e9ed73becac7f
- tools last changed: 2026-11-05T13:42:23.885Z
- badge: [![protogrid quality](https://protogrid.dev/badge/uk.co.babydata/pregnancy-calculators.svg)](https://protogrid.dev/servers/uk.co.babydata/pregnancy-calculators)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-11-05 `maternity_pay` changed (title, annotations)
- 2026-11-05 `pregnancy_weeks` changed (title, annotations)
- 2026-11-05 `calculate_ovulation` changed (title, annotations)
- 2026-11-05 `calculate_due_date` changed (title, annotations)

Full history: https://api.protogrid.dev/v1/servers/uk.co.babydata%2Fpregnancy-calculators/changes

## Remotes

- https://babydata.co.uk/mcp (streamable-http, auth none, reachable true, uptime30d 0.95454544)

## Packages

_none_

## Tools (4)

- `calculate_due_date`: Estimate a pregnancy due date and current stage using Naegele's rule, from the last menstrual period (LMP), conception date, or an IVF embryo-transfer date. Returns the estimated due date, weeks pregnant now, trimester and weeks remaining. Informational only, not medical advice.
- `calculate_ovulation`: Estimate the likely ovulation day, the fertile window and the next period from the first day of the last period and the average cycle length. Informational only.
- `maternity_pay`: Estimate UK Statutory Maternity Pay over the 39 weeks under gov.uk rules: 90% of average weekly earnings for 6 weeks, then the lower of the statutory flat rate or 90%. Uses the 2026-27 gov.uk flat rate of £194.32 a week, which changes each April. Estimate only, not advice.
- `pregnancy_weeks`: Work out how many weeks and days pregnant someone is, the trimester and progress through the 40 weeks, from either the LMP or the due date. Informational only, not medical advice.