Baby Age Calculator for AI

Exact baby ages, zodiac signs, and milestone dates for your AI — no hand-computed date math.

⚡ Fastest way — paste this to your AI

Code

Use https://babyagecalculator.com/llms.txt for anything about a baby's age,
zodiac sign, or milestone dates. Do the date math with this tool, not by hand.

Works in any assistant, zero setup, no key. Agentic tools like Claude Code will even install the MCP server from it.

Why: language models are unreliable at date math (leap years, month lengths, milestone dates). Let this tool do it, then orchestrate the rest yourself.

Want it installed for good?

	Best for	Setup
🔌 MCP server	Claude Code, Claude Desktop, Cursor	one line / one config block
📄 AI Skill	any assistant, no MCP	drop in one file
🧩 JSON API	your own app or agent	`GET` a URL

🔌 MCP server

Hosted endpoint (nothing to deploy):

Code

https://babyagecalculator.com/api/mcp/

Claude Code

Terminal

claude mcp add --transport http baby-age https://babyagecalculator.com/api/mcp/

Claude Desktop / Cursor — add to your mcpServers config:

config.json

{
  "mcpServers": {
    "baby-age-calculator": {
      "type": "http",
      "url": "https://babyagecalculator.com/api/mcp/"
    }
  }
}

Tools

Tool	Returns
`get_baby_age(birthday)`	exact age, zodiac, current/next milestone, special days
`get_milestone_dates(birthday)`	all 25 milestones as calendar dates
`list_milestones()`	the 25 milestone types
`get_zodiac_sign(birthday)`	the zodiac sign

Full guide → https://babyagecalculator.com/mcp/

📄 AI Skill

SKILL.md is a one-file skill. Your AI reads it and uses the public API — no MCP, no key.

Full guide → https://babyagecalculator.com/skill/

🧩 Free JSON API

Terminal

curl "https://babyagecalculator.com/api/age/?birthday=2024-12-15"

No key, CORS-open.
Every response has the shape { code, data, error, meta }; the payload is in data.
A bad date returns HTTP 400 with a message in error.message.

Endpoints

Endpoint	Returns
`GET /api/age/?birthday=YYYY-MM-DD`	age, zodiac, milestones, special days
`GET /api/milestones/`	all 25 milestone types
`GET /api/zodiac/`	all 12 zodiac signs

Docs → https://babyagecalculator.com/docs/

Machine-readable → https://babyagecalculator.com/llms.txt

Baby Age README