Return the projected value of an investment with compound growth and monthly contributions: final balance, total contributions, total interest, an effective yearly growth rate, and a year-by-year table. Return is a yearly percentage; contributions are added at the start or the end of each month.
This page documents the HTTP endpoint POST /api/tools/investment-calculator/execute. See the MCP reference →
Call it over REST
POST https://api.findutils.com/api/tools/investment-calculator/execute · no API keys · 60 requests/min per IP
Execute — verified arguments
curl -X POST https://api.findutils.com/api/tools/investment-calculator/execute \
-H "Content-Type: application/json" \
-d '{
"initial_investment": 10000,
"monthly_contribution": 500,
"annual_return": 7,
"years": 20,
"compound_frequency": "monthly",
"contribution_timing": "end"
}'Parameter schema for this endpoint
curl https://api.findutils.com/api/tools/investment-calculatorInput schema
| Argument | Type | Required | Description |
|---|---|---|---|
| initial_investment | number | no | Starting amount. Default: 0. |
| monthly_contribution | number | no | Amount added every month. Default: 0. |
| annual_return | number | yes | Expected yearly return in percent (7 = 7%). |
| years | integer | yes | Investment length in years. |
| compound_frequency | string (annually | semiannually | quarterly | monthly | daily) | no | How often returns compound. Default: monthly. |
| contribution_timing | string (beginning | end) | no | Add the contribution at the beginning or the end of each month. Default: end. |
Example arguments (verified)
{
"initial_investment": 10000,
"monthly_contribution": 500,
"annual_return": 7,
"years": 20,
"compound_frequency": "monthly",
"contribution_timing": "end"
}Also an MCP tool
Claude, Cursor, and any MCP client can call this tool as
findutils:investment_calculator after one connect command.
Connect once
claude mcp add findutils --transport http https://mcp.findutils.com/More Finance tools
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