Savings Goal Calculator

Months to reach a savings target at a given monthly amount, or the monthly amount needed for a fixed horizon.

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

Parameters

Parameter	Type	Required	Description
`target_amount`	number	required	Savings target in USD
`current_savings`	number	optional	Amount already saved in USD
`monthly_contribution`	number	optional	Monthly contribution in USD (time-to-goal mode)
`target_months`	integer	optional	Months to reach the goal (solve-contribution mode)
`annual_return`	number	optional	Expected annual return as a PERCENT (default 0)

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": "savings_goal", "arguments": {"target_amount": 1000}}}'

Or plain HTTP

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

Try it live

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