Body Mass Index (BMI)

BMI from weight and height, the WHO weight category, and the healthy-weight range for your height. Metric (kg/cm) or imperial (lb/in).

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

Parameters

Parameter	Type	Required	Description
`weight`	number	required	Body weight (kg if metric, lb if imperial)
`height`	number	required	Height (cm if metric, inches if imperial)
`unit`	string	optional	'metric' (kg/cm) or 'imperial' (lb/in); default metric

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": "bmi", "arguments": {"weight": 180, "height": 70}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/bmi \
  -H 'Content-Type: application/json' \
  -d '{"weight": 180, "height": 70}'

Try it live

Edit the JSON and run it — this POSTs to https://wingmanprotocol.com/tools/bmi 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).