Change Order Calculator

Priced change order with overhead, profit and revised contract total.

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

Parameters

Parameter	Type	Required	Description
`original_contract`	number	required	Original contract amount in USD
`material_cost`	number	optional	Added material cost in USD
`labor_hours`	number	optional	Added labor hours
`labor_rate`	number	optional	Labor rate per hour in USD
`overhead_pct`	number	optional	Overhead percent on the change
`profit_pct`	number	optional	Profit percent on the change
`schedule_impact_days`	number	optional	Added days to the schedule

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": "change_order", "arguments": {"original_contract": 100}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/change_order \
  -H 'Content-Type: application/json' \
  -d '{"original_contract": 100}'

Try it live

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