Calendar Age Calculator

Compute calendar-accurate years/months/days between a birth date and an as-of date, plus total days and days until the next birthday.

Free tier eligible — 500 calls/month with a free key from /pricing; x402 pay-per-call above quota.

Parameters

Parameter	Type	Required	Description
`birth_date`	string	required	Birth date, ISO 'YYYY-MM-DD'
`as_of_date`	string	required	Date to compute the age as of, ISO 'YYYY-MM-DD'

Call it over MCP (JSON-RPC 2.0)

curl -s https://wingmanprotocol.com/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": {"name": "age_calculator", "arguments": {"birth_date": "2026-07-06", "as_of_date": "2026-07-06"}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/age_calculator \
  -H 'Content-Type: application/json' \
  -d '{"birth_date": "2026-07-06", "as_of_date": "2026-07-06"}'

Try it live

Edit the JSON and run it — this POSTs to https://wingmanprotocol.com/tools/age_calculator from your browser.

This tool is x402-metered — agents pay per call with USDC on Base. The 402 response below is the standard x402 payment-requirements envelope: sign the EIP-3009 authorization and retry with the X-Payment header, or get a free key at /pricing (500 calls/month, no card, no crypto).