For AI agents & power users

Use RetireCrunch from your AI assistant

RetireCrunch's calculators are exposed as Model Context Protocol (MCP) tools. Connect them to Claude, ChatGPT, Cursor or any MCP-compatible client and ask retirement-planning questions in plain language.

Endpoint

https://mcp.retirecrunch.com/mcp

Transport: Streamable HTTP
Auth: None — rate-limited per IP

Available tools

calculate_fire_target
Estimate the savings target you need for Financial Independence / Early Retirement, with a Monte Carlo run across the planning horizon.
calculate_coast_fire
Capital required today such that, with no further contributions, your portfolio compounds to your retirement target.
compute_swiss_property_tax
Swiss cantonal real-estate capital gains tax (Grundstückgewinnsteuer) for all 26 cantons, with holding-period adjustments and Ersatzbeschaffung deferral.
project_wealth_plan
Full year-by-year household projection — income, expenses, portfolio, mortgage, optional property sale, region-aware tax.
get_portfolio_returns
Historical (return %, volatility %) profiles by currency, useful for grounding your assumptions in real data.
rebalance_portfolio
Rebalance a multi-currency portfolio — set target weights per asset class (or holding) and get the exact buy/sell trades to reach them. Holds positions in any currency, nets cash per currency, and funds foreign buys from your base-currency cash.

Connect it to your assistant

Claude.ai (web)

Settings → Connectors → Add custom connector → paste the URL above.

ChatGPT (web)

Settings → Connectors → Add MCP server → paste the URL above.

Cursor, Cline, Continue & other editors

Most MCP-aware editors accept a remote URL in their MCP settings — paste it there.

Claude Desktop (config file)

Edit your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json) and add this entry:

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

Example prompts

Once it's connected, just ask in plain language. A few to try:

“Am I on track to retire at 55 with CHF 1.2M saved and CHF 60k a year of spending?”
“I'm 40, earn $180k and save $40k a year — project my net worth to 90 if I retire at 60.”
“I'm 30 with $150k invested. Have I hit Coast FIRE for a $2M target at 65?”
“I'm selling a Zurich flat I bought for CHF 800k at CHF 1.1M after 6 years — what's the capital-gains tax?”
“Rebalance my USD/EUR/CHF portfolio to 60% stocks / 30% bonds / 10% cash and show the exact buy/sell trades.”
“What historical return and volatility should I assume for a CHF portfolio?”

Sanity check

List the tool catalog from any terminal:

curl -sN -X POST \
  -H 'content-type: application/json' \
  -H 'accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' \
  https://mcp.retirecrunch.com/mcp

Outputs are educational estimates, not financial advice.