One-Rep Max (1RM) Estimator

Estimate one-rep max from a weight x reps set (Epley + Brzycki) plus a percentage-of-1RM training table with load and rep targets.

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	Weight lifted
`reps`	integer	required	Reps performed at that weight
`unit`	string	optional	Weight unit label, e.g. 'lb' or 'kg' (default 'lb')

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": "one_rep_max", "arguments": {"weight": 180, "reps": 10}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/one_rep_max \
  -H 'Content-Type: application/json' \
  -d '{"weight": 180, "reps": 10}'

Try it live

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