Baby Age Calculator MCP server

• Registry namecom.babyagecalculator/baby-ageverified in the MCP registry

The registry name sits under babyagecalculator.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-17
• Tools5
• Server calls itselfbaby-age-calculator
• Server version1.1.0
• Protocol version2025-06-18

On 2026-10-17 the server answered initialize and tools/list without a sign-in. First answer in 67 ms.

• Whether its tools do the product's job has not been judged yet.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP score82 of 100answers 100 · definitions 83 · context 100 · use 0 · connects 100
• Answered100% of days17 of 17 daily checks
• Median first answer386 ms
• Space in an agent's context≈ 580 tokensthe definitions of all its tools (5), which an agent carries on every turn
• Tool definitionsB · 83 of 100
• Typed results0 of 5 toolsdeclared outputSchema: results come typed, read once

• Not saying whether it only reads or can destroy: 5 of 5

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• get_baby_age

  Get a baby's exact age from a birth date - years, months, weeks, days, totals, zodiac sign, birthstone, the current and next milestone, and special-day dates (100 days, first birthday, 1000 days). Use for any 'how old is the baby'…

• get_milestone_dates

  Get the exact calendar date of all 25 baby milestones for a given birth date (monthly, special days, and birthdays), each with days_left and whether it is reached. Use this to add baby milestones to a calendar.

• list_milestones

  List the 25 baby milestone types this tool knows (name, emoji, day offset from birth, group). No birth date needed. Use get_milestone_dates to turn these into real dates.

• get_zodiac_sign

  Get the zodiac sign (Western astrology) for a birth date, with element, nickname, date range, and a guide link.

• get_birthstone

  Get the full birthstone guide for a birth date's month: every stone (some months have three) with colors, hardness, sources and story, plus meaning for the baby, keepsake ideas, a safety note, the month's zodiac signs, quick answers, and…