Calculators MCP Server

by retirecrunch Your server? Claim it

answering

Calculators is answering right now. Last checked moments ago. It exposes 6 tools.

FIRE & retirement calculators + a multi-currency portfolio rebalancer (exact buy/sell trades).

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 51 days of history · worst day 99%

51 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

177 ms

Response time

average over 24h

open, no key

Access

streamable-http

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add calculators --transport http https://mcp.retirecrunch.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "calculators": {
      "url": "https://mcp.retirecrunch.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.calculators]
url = "https://mcp.retirecrunch.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "calculators": {
      "url": "https://mcp.retirecrunch.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "calculators": {
      "url": "https://mcp.retirecrunch.com/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

calculate

calculate_coast_fire

Compute the Coast FIRE milestone — the capital required today such that, with no further contributions, a portfolio compounds to the user's retirement target by their target age.

calculate_fire_target

Estimate the savings target needed for Financial Independence / Early Retirement. Runs Monte Carlo simulation and returns the probability the portfolio survives the planning horizon.

compute

compute_swiss_property_tax

Estimate the Swiss cantonal real-estate capital gains tax (Grundstückgewinnsteuer) for a property sale. Covers all 26 cantons with holding-period adjustments and Ersatzbeschaffung (replacement-residence) deferral. Educational estimate; commune surcharges and value-enhancing-improvement deductions are not modeled.

portfolio

get_portfolio_returns

Return RetireCrunch's historical portfolio return profiles for a currency. Each profile is a (return %, volatility %) pair derived from real index data — useful for grounding the assumptions in calculate_fire_target / project_wealth_plan in something defensible rather than guessing.

project

project_wealth_plan

Run RetireCrunch's full year-by-year Wealth Plan projection for a household. Models earned income, pensions, expenses, portfolio growth, optional growth→income phase switch, mortgage amortization, optional property sale, and region-aware tax (US uses 2026 federal+state brackets; other regions use a flat rate). Returns a compact summary with 5-year milestones by default, or the full annual array when yearly_detail=true.

rebalance

rebalance_portfolio

Rebalance a multi-currency portfolio: given holdings, per-holding (or per-asset-class) target weights, cash and FX rates, return the exact BUY/SELL trades to reach the targets, the per-currency cash movements (flagging foreign-cash overdrafts), and a summary. Planning math only — no transaction costs or taxes.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.retirecrunch.com/mcp	streamable-http	answering	142 ms	0 min ago

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Calculators — questions

Answers built from our own checks of this server.

What can Calculators do?

It exposes 6 tools, read directly from the server on our last check. Among them: calculate_coast_fire, calculate_fire_target, compute_swiss_property_tax, get_portfolio_returns, project_wealth_plan, rebalance_portfolio. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Calculators working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 177 ms. The bar chart above shows every period we have measured.

Is Calculators still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect Calculators?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Calculators need an API key?

No. Calculators completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Calculators?

It answers our handshake in 177 ms on average, which is faster than 74% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.