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 MCP tool findutils:investment_calculator. See the REST reference →
Call it over MCP
Tool name findutils:investment_calculator
· no API keys · 120 requests/min per IP
Claude Code
claude mcp add findutils --transport http https://mcp.findutils.com/Claude Desktop — claude_desktop_config.json
{
"mcpServers": {
"findutils": {
"url": "https://mcp.findutils.com/"
}
}
}Raw JSON-RPC (any MCP client) — verified example
curl -X POST https://mcp.findutils.com/ \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "investment_calculator",
"arguments": {
"initial_investment": 10000,
"monthly_contribution": 500,
"annual_return": 7,
"years": 20,
"compound_frequency": "monthly",
"contribution_timing": "end"
}
}
}'Input 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 a REST endpoint
The same tool answers plain HTTP at
POST /api/tools/investment-calculator/execute — no key, 60 requests/min.
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