Date Difference Calculator

Days, weeks, months and business days between two ISO dates.

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

Parameters

Parameter	Type	Required	Description
`start_date`	string	required	Start date, ISO 'YYYY-MM-DD'
`end_date`	string	required	End date, ISO 'YYYY-MM-DD'

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": "date_diff", "arguments": {"start_date": "2026-07-06", "end_date": "2026-07-06"}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/date_diff \
  -H 'Content-Type: application/json' \
  -d '{"start_date": "2026-07-06", "end_date": "2026-07-06"}'

Try it live

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