Business-Day Calculator

Count workdays between two dates, or add N business days to a date — skipping weekends and holidays.

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

Parameters

Parameter	Type	Required	Description
`mode`	string	optional	Operation One of: count, add
`start`	string	required	Start date YYYY-MM-DD
`end`	string	optional	End date YYYY-MM-DD (count mode)
`days`	integer	optional	Business days to add, may be negative (add mode)
`holidays`	array	optional	Optional list of YYYY-MM-DD dates to exclude

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": "business_days", "arguments": {"start": "example"}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/business_days \
  -H 'Content-Type: application/json' \
  -d '{"start": "example"}'

Try it live

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