Construction Draw Schedule Calculator

Milestone draw schedule (deposit, draws, retainage) for a fixed-price construction contract.

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

Parameters

Parameter	Type	Required	Description
`contract_amount`	number	required	Total contract amount in USD
`num_draws`	integer	optional	Number of progress draws
`deposit_pct`	number	optional	Up-front deposit percent
`retainage_pct`	number	optional	Retainage percent held until completion

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": "draw_schedule", "arguments": {"contract_amount": 1000}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/draw_schedule \
  -H 'Content-Type: application/json' \
  -d '{"contract_amount": 1000}'

Try it live

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