baby-age — Claude Code MCP server: what it does, how to install
Calculates exact baby age, 25 developmental milestone dates, zodiac signs, and birthstones. The MCP server eliminates LLM errors with leap years and month lengths.
claude mcp add --transport http baby-age https://babyagecalculator.com/api/mcp/What baby-age does
Large language models often stumble when calculating calendar intervals. Leap years and irregular month lengths cause frequent mistakes. This hosted MCP server offloads the calendar math. It accepts a birth date and calculates the baby's exact age, next milestone, zodiac sign, and birthstone guide.
The server provides five tools: get_baby_age, get_milestone_dates, list_milestones, get_zodiac_sign, and get_birthstone. It can return calendar dates for all 25 milestone types. If an invalid date string is provided, the endpoint returns an HTTP 400 status code with an explanation.
The endpoint is hosted at https://babyagecalculator.com/api/mcp/. You do not need to register or manage API keys. All calls run directly over HTTP, so nothing needs to be compiled or run locally.
What it helps with
- calculate exact baby age from a birth date
- generate calendar dates for 25 milestones
- identify zodiac signs and birthstones without manual math
- prevent language model errors with leap years and month lengths
Example prompts for the agent
- Calculate the exact age of a baby born on 2024-06-15.
- List the calendar dates for all 25 milestones for birth date 2024-10-01.
- Find the zodiac sign and birthstone details for 2025-02-14.
How to install baby-age
Platform CLI: remote server
claude mcp add --transport http baby-age https://babyagecalculator.com/api/mcp/Platform CLI: remote server
codex mcp add baby-age --url https://babyagecalculator.com/api/mcp/Config file
{
"mcpServers": {
"baby-age": {
"url": "https://babyagecalculator.com/api/mcp/"
}
}
}Config file
{
"servers": {
"baby-age": {
"type": "http",
"url": "https://babyagecalculator.com/api/mcp/"
}
}
}Platform CLI: remote server
gemini mcp add -t http baby-age https://babyagecalculator.com/api/mcp/Step by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about baby-age
How do I install baby-age in Claude Code?
Run claude mcp add --transport http baby-age https://babyagecalculator.com/api/mcp/ in your terminal. This connects Claude Code directly to the hosted HTTP endpoint.
What does the baby-age MCP server do?
It handles date calculations for babies, preventing AI hallucination on month lengths and leap years. It returns exact ages, 25 developmental milestone dates, zodiac signs, and birthstones.
Do I need an API key or an account to use baby-age?
No API key or sign-up is required. The server is publicly hosted and communicates via HTTP.
