Calcfi Mcp
mcp.so submission — calcfi-mcp
Source page: https://mcp.so/my/servers/8b20fd0e-1cfc-4181-9913-594f31313295/edit Last updated: 2026-06-01
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Name
calcfi-mcp
Title
CalcFi MCP
Description
24 free personal-finance + macro tools (mortgage, paycheck, tax, FRED, BLS) for LLM agents. Zero API keys, stdio transport.
Status
created — leave default
Type
server — leave default
Tags
finance,fintech,calculators,mortgage,tax,fred,bls,irs,personal-finance,stdio,claude,cursor
Avatar URL
Primary: https://calcfi.app/icon-512.png
Fallback if 404: https://calcfi.app/favicon.ico
Author Name
jeresalmisto
GitHub URL
https://github.com/jeresalmisto/calcfi-mcp
Server Config
{
"mcpServers": {
"calcfi": {
"command": "npx",
"args": ["-y", "calcfi-mcp-server"]
}
}
}
Content
(Below is raw markdown. Links render clickable in this document so you can verify each URL works before submitting. Copy from ## What it does to the last MCP Registry entry line and paste into the mcp.so Content editor.)
What it does
CalcFi MCP exposes 24 tools to LLM agents covering personal finance and live US macroeconomic data. All calculations are deterministic and source-cited from IRS, Federal Reserve, BLS, Treasury, Census, HUD, and Freddie Mac.
Personal-finance tools
- Mortgage payment + amortization — Freddie Mac PMMS + HUD FMR + Census ACS
- Take-home pay calculator — federal + state withholding (IRS Pub 15-T + state DOR tables)
- Federal + state tax brackets
- Retirement savings projection with Monte Carlo confidence bands
- Debt payoff comparison — snowball + avalanche
- Compound interest visualizer
- 401(k) contribution optimizer — current-year IRS limits
- Self-employed tax estimator — 15.3% SE rate + quarterly estimates
Live macro data tools
- FRED series lookup — Federal Reserve Economic Data
- BLS labor data — unemployment, wages, CPI
- Freddie Mac PMMS weekly mortgage rates
- IRS Rev. Proc. table queries
- Treasury yield curve
- Census ACS demographics + income
- HUD FMR rent + Zillow ZHVI home values by state
Install
Claude Desktop / Cursor / Cline / any MCP client:
{
"mcpServers": {
"calcfi": {
"command": "npx",
"args": ["-y", "calcfi-mcp-server"]
}
}
}
Python: pip install calcfi-mcp
{
"mcpServers": {
"calcfi": {
"command": "python",
"args": ["-m", "calcfi_mcp"]
}
}
}
Full developer docs + API reference →
Why use it
- Deterministic. Math runs in code, not predicted by the LLM. No hallucinated tax brackets, no drifted mortgage rates.
- Source-cited. Every tool output includes the IRS publication, Fed series ID, BLS table number, or other primary-source reference. See the methodology page.
- Free + open. No API key, no signup, MIT license. Backed by free public financial data updated daily.
- Already on the official Model Context Protocol Registry as
io.github.jeresalmisto/calcfi-mcpv0.1.6.
Built by
Jere Salmisto, solo founder in Helsinki — building free personal-finance tools for LLM agents and consumers.
Links
- calcfi.app — Free financial calculators
- GitHub source
- npm calcfi-mcp-server
- PyPI calcfi-mcp
- MCP Registry entry
Server Config
{
"mcpServers": {
"calcfi": {
"command": "npx",
"args": [
"-y",
"calcfi-mcp-server"
]
}
}
}