FIRE and retirement calculators with portfolio rebalancing for multi-currency investments.
Retirement planning tools including FIRE target estimation, Coast FIRE milestones, Swiss property tax calculation, year-by-year wealth projections, and multi-currency portfolio rebalancing with exact buy/sell trades.
Try asking Muse: "Calculate how much I need to save to retire in 15 years with my current spending and investment returns."
Source: Found in the official MCP Registry (com.retirecrunch/calculators) · First listed September 24, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://mcp.retirecrunch.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
RetireCrunch Calculators is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://mcp.retirecrunch.com/mcpResponse time at the last check: 87ms. Worked in 100% of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
calculate_fire_targetEstimate the savings target needed for Financial Independence / Early Retirement. Runs Monte Carlo simulation and returns the probability the portfolio survives the planning horizon.calculate_coast_fireCompute 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.compute_swiss_property_taxEstimate 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-improproject_wealth_planRun RetireCrunch's full year-by-year Wealth Plan projection for a household. Models earned income, pensions, expenses, portfolio growth (accumulating, distributing, or accumulating until a switch year), mortgage amortization, optional property sale, and region-aware tax (US uses get_portfolio_returnsReturn 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 guessirebalance_portfolioRebalance 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. It is the same plan load_portfolioOpen the user's Interactive Brokers portfolio in the RetireCrunch Portfolio Rebalancer. First call the IBKR connector's get_account_positions, get_account_balances and get_account_summary, then pass their results here UNCHANGED (do not re-type or round numbers). Returns a privateget_rebalance_planFetch the rebalancing trades the user decided on in the RetireCrunch Rebalancer, from the plan code they copied ("Send plan to my AI"). Codes work once, for 15 minutes. Returns the trades with IBKR contract ids where known. To act on them, create one IBKR order instruction per trhttps://mcp.retirecrunch.com/mcpNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use RetireCrunch Calculators to help me. It is a free service with an MCP server at https://mcp.retirecrunch.com/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 13, 2026, 14:45 UTC) the endpoint was working, answering in 87ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 8 tools, including calculate_fire_target, calculate_coast_fire, compute_swiss_property_tax, project_wealth_plan. For example, you could ask Muse: "Calculate how much I need to save to retire in 15 years with my current spending and investment returns."
This listing was added from public sources (Found in the official MCP Registry (com.retirecrunch/calculators)). If you build RetireCrunch Calculators, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
<a href="https://musedirectory.ai/connector/retirecrunch-calculators"><img src="https://musedirectory.ai/badge/retirecrunch-calculators.svg" alt="RetireCrunch Calculators on musedirectory.ai" width="236" height="40"></a>