Rebar Calculator

Total rebar length, bar count and cost for a grid from slab dimensions and spacing.

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

Parameters

Parameter	Type	Required	Description
`length`	number	required	Slab length in feet
`width`	number	required	Slab width in feet
`spacing_in`	number	optional	Grid spacing in inches
`bar_size`	string	optional	Rebar size designation (e.g. #4, #5)
`lap_pct`	number	optional	Lap/overlap allowance percent
`cost_per_lf`	number	optional	Cost per linear foot in USD

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": "rebar", "arguments": {"length": 20, "width": 12}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/rebar \
  -H 'Content-Type: application/json' \
  -d '{"length": 20, "width": 12}'

Try it live

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