compoundsim
Registry code: 365d154687314186
compoundsim simulates long-term investing: fixed-rate compound interest, Monte Carlo paths of monthly investing in 13 assets and their mixes, retirement withdrawals, and past asset returns, in 19 currencies. Amounts go in and come out in the chosen currency. Pass the user's language so the url opens in it, and share the url with the figures so the user can adjust the scenario. Say the figures come from a simulation of past data, not a forecast.
- endpoint
- https://compoundsim.app/mcp
- protocol
- http-sse ·2025-06-18
- authentication
- none observed
- public key
- none — nobody has proven they own this listing · is it yours? claim it
- karma
- 0 · newcomer
- Is compoundsim live?
- Yes — it answered the hub's last check (checked 56m ago). It answered 100% of checks over the last 30 days.
- Is compoundsim free to use?
- Yes — the hub reached it with no key and no payment.
- What tools does compoundsim have?
- 5 tools: simulate_withdrawal, get_asset_returns, compare_portfolios, simulate_fixed_rate, simulate_portfolio.
- Is compoundsim safe to connect?
- The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
90 days 100%· all time 100%
last good check
of 5 tools
- unknown → live
Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.
through this hub
successful
what callers paid
Access was read off the card rather than seen on the wire: inferred: the handshake, the tool list and a call without arguments went through with no key and no payment asked; no tool was run
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simulate_withdrawal unknown never probed
Monte Carlo simulation of withdrawing a yearly percentage of a starting balance, raised with inflation every month, from a portfolio (the 4% rule and its variants). Returns the share of paths that still had money at the end, when the others ran out, the remaining balance range in today's money, the success rate at withdrawal rates from 2% to 8%, and a compoundsim.app url.
{ "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "portfolio", "balance" ], "properties": { "years": { "type": "integer", "default": 30, "maximum": 60, "minimum": 1, "description": "Years the money has to last." }, "balance": { "type": "number", "maximum": 1000000000000, "minimum": 0, "description": "Starting balance." }, "history": { "enum": [ "5", "10", "20", "all" ], "type": "string", "default": "all", "description": "The span of past monthly returns the model is fitted to: the last 5, 10 or 20 years, or all the data. An asset with less data than the span asked for uses all of its own." }, "currency": { "enum": [ "USD", "EUR", "JPY", "GBP", "CNY", "CHF", "AUD", "CAD", "HKD", "SGD", "KRW", "INR", "TWD", "BRL", "THB", "IDR", "PHP", "MYR", "VND" ], "type": "string", "description": "Currency of every amount, in and out. In a currency other than USD the paths carry its exchange-rate swings against the dollar (trend removed). Defaults to the language's currency." }, "language": { "enum": [ "de", "en", "es", "fr", "id", "ja", "ko", "pt-BR", "th", "vi", "zh-Hans", "zh-Hant" ], "type": "string", "default": "en", "description": "Language of the page the returned url opens; match the user's language." }, "portfolio": { "anyOf": [ { "enum": [ "sixtyForty", "allCountry", "allWeather" ], "type": "string" }, { "type": "object", "properties": { "agg": { "type": "number", "maximum": 100, "minimum": 0 }, "btc": { "type": "number", "maximum": 100, "minimum": 0 }, "eem": { "type": "number", "maximum": 100, "minimum": 0 }, "efa": { "type": "number", "maximum": 100, "minimum": 0 }, "gld": { "type": "number", "maximum": 100, "minimum": 0 }, "shy": { "type": "number", "maximum": 100, "minimum": 0 }, "sox": { "type": "number", "maximum": 100, "minimum": 0 }, "tlt": { "type": "number", "maximum": 100, "minimum": 0 }, "vnq": { "type": "number", "maximum": 100, "minimum": 0 }, "acwi": { "type": "number", "maximum": 100, "minimum": 0 }, "schd": { "type": "number", "maximum": 100, "minimum": 0 }, "sp500": { "type": "number", "maximum": 100, "minimum": 0 }, "ndx100": { "type": "number", "maximum": 100, "minimum": 0 } }, "additionalProperties": false } ], "description": "A preset name or weights in percent by asset (any total; they are scaled to 100). Assets: sp500 = S&P 500, ndx100 = Nasdaq 100, sox = SOX (Semiconductors), schd = US dividend stocks (SCHD), acwi = MSCI ACWI, efa = Developed ex-US stocks, eem = Emerging market stocks, vnq = US REITs, gld = Gold, shy = US 1–3 year Treasuries, agg = US aggregate bonds, tlt = US long-term Treasuries, btc = Bitcoin. Presets: sixtyForty = sp500 60% + agg 40%; allCountry = acwi 100%; allWeather = sp500 30% + tlt 40% + shy 15% + gld 15%." }, "history_to": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "Last calendar year of a custom span." }, "history_from": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "First calendar year of a custom span (with history_to); replaces history." }, "inflation_percent": { "type": "number", "default": 2, "maximum": 20, "minimum": 0, "description": "Annual inflation the withdrawals rise with; balances are in today's money." }, "withdrawal_rate_pct": { "type": "number", "default": 4, "maximum": 20, "minimum": 0, "description": "First year's withdrawal as a percentage of the starting balance." } } }arguments 188 linesget_asset_returns unknown never probed
Annualised past returns of the assets compoundsim simulates, over the last 5, 10 or 20 years, all the data, or a calendar span: total return with dividends reinvested, price return, the dividends' share, volatility, and the return after US inflation (in USD) or the exchange rate's share of the return (in another currency).
{ "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "assets": { "type": "array", "items": { "enum": [ "sp500", "ndx100", "sox", "schd", "acwi", "efa", "eem", "vnq", "gld", "shy", "agg", "tlt", "btc" ], "type": "string" }, "minItems": 1, "description": "Assets to include; all of them when omitted." }, "period": { "enum": [ "5", "10", "20", "all" ], "type": "string", "default": "10", "description": "The span measured: the last 5, 10 or 20 years, or all the data. An asset with less data than the span asked for uses all of its own." }, "currency": { "enum": [ "USD", "EUR", "JPY", "GBP", "CNY", "CHF", "AUD", "CAD", "HKD", "SGD", "KRW", "INR", "TWD", "BRL", "THB", "IDR", "PHP", "MYR", "VND" ], "type": "string", "description": "Currency of every amount, in and out. In a currency other than USD the paths carry its exchange-rate swings against the dollar (trend removed). Defaults to the language's currency." }, "language": { "enum": [ "de", "en", "es", "fr", "id", "ja", "ko", "pt-BR", "th", "vi", "zh-Hans", "zh-Hant" ], "type": "string", "default": "en", "description": "Language of the page the returned url opens; match the user's language." }, "period_to": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "Last calendar year of a custom span." }, "period_from": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "First calendar year of a custom span (with period_to); replaces period." } } }arguments 96 linescompare_portfolios unknown 56m ago
Runs the same monthly-investing plan through 2 to 4 portfolios (the same simulation as simulate_portfolio) and returns each one's final outcome range, deepest fall, past return and volatility, and url, for questions like 'S&P 500 or all-country stocks?'.
{ "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "portfolios", "monthly" ], "properties": { "years": { "type": "integer", "default": 20, "maximum": 40, "minimum": 1, "description": "Years of investing." }, "history": { "enum": [ "5", "10", "20", "all" ], "type": "string", "default": "all", "description": "The span of past monthly returns the model is fitted to: the last 5, 10 or 20 years, or all the data. An asset with less data than the span asked for uses all of its own." }, "initial": { "type": "number", "default": 0, "maximum": 1000000000000, "minimum": 0, "description": "Starting sum invested at once." }, "monthly": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "Amount invested at the end of every month." }, "currency": { "enum": [ "USD", "EUR", "JPY", "GBP", "CNY", "CHF", "AUD", "CAD", "HKD", "SGD", "KRW", "INR", "TWD", "BRL", "THB", "IDR", "PHP", "MYR", "VND" ], "type": "string", "description": "Currency of every amount, in and out. In a currency other than USD the paths carry its exchange-rate swings against the dollar (trend removed). Defaults to the language's currency." }, "language": { "enum": [ "de", "en", "es", "fr", "id", "ja", "ko", "pt-BR", "th", "vi", "zh-Hans", "zh-Hant" ], "type": "string", "default": "en", "description": "Language of the page the returned url opens; match the user's language." }, "history_to": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "Last calendar year of a custom span." }, "portfolios": { "type": "array", "items": { "type": "object", "required": [ "portfolio" ], "properties": { "label": { "type": "string", "description": "Name to show for this portfolio." }, "portfolio": { "anyOf": [ { "enum": [ "sixtyForty", "allCountry", "allWeather" ], "type": "string" }, { "type": "object", "properties": { "agg": { "type": "number", "maximum": 100, "minimum": 0 }, "btc": { "type": "number", "maximum": 100, "minimum": 0 }, "eem": { "type": "number", "maximum": 100, "minimum": 0 }, "efa": { "type": "number", "maximum": 100, "minimum": 0 }, "gld": { "type": "number", "maximum": 100, "minimum": 0 }, "shy": { "type": "number", "maximum": 100, "minimum": 0 }, "sox": { "type": "number", "maximum": 100, "minimum": 0 }, "tlt": { "type": "number", "maximum": 100, "minimum": 0 }, "vnq": { "type": "number", "maximum": 100, "minimum": 0 }, "acwi": { "type": "number", "maximum": 100, "minimum": 0 }, "schd": { "type": "number", "maximum": 100, "minimum": 0 }, "sp500": { "type": "number", "maximum": 100, "minimum": 0 }, "ndx100": { "type": "number", "maximum": 100, "minimum": 0 } }, "additionalProperties": false } ], "description": "A preset name or weights in percent by asset (any total; they are scaled to 100). Assets: sp500 = S&P 500, ndx100 = Nasdaq 100, sox = SOX (Semiconductors), schd = US dividend stocks (SCHD), acwi = MSCI ACWI, efa = Developed ex-US stocks, eem = Emerging market stocks, vnq = US REITs, gld = Gold, shy = US 1–3 year Treasuries, agg = US aggregate bonds, tlt = US long-term Treasuries, btc = Bitcoin. Presets: sixtyForty = sp500 60% + agg 40%; allCountry = acwi 100%; allWeather = sp500 30% + tlt 40% + shy 15% + gld 15%." } } }, "maxItems": 4, "minItems": 2, "description": "The portfolios to compare." }, "history_from": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "First calendar year of a custom span (with history_to); replaces history." }, "inflation_percent": { "type": "number", "maximum": 20, "minimum": 0, "description": "Annual inflation. When given, every amount out is in today's money at this rate; omitted, amounts are nominal." } } }arguments 205 linessimulate_fixed_rate unknown 56m ago
Deterministic compound growth of monthly contributions (plus an optional starting sum) at a fixed annual return. Returns contributions, gains and total by year, and a compoundsim.app url. Use simulate_portfolio for the range of outcomes of real assets.
{ "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "monthly" ], "properties": { "years": { "type": "integer", "default": 20, "maximum": 60, "minimum": 1, "description": "Years of investing." }, "initial": { "type": "number", "default": 0, "maximum": 1000000000000, "minimum": 0, "description": "Starting sum invested at once." }, "monthly": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "Amount invested at the end of every month." }, "currency": { "enum": [ "USD", "EUR", "JPY", "GBP", "CNY", "CHF", "AUD", "CAD", "HKD", "SGD", "KRW", "INR", "TWD", "BRL", "THB", "IDR", "PHP", "MYR", "VND" ], "type": "string", "description": "Currency of every amount, in and out. In a currency other than USD the paths carry its exchange-rate swings against the dollar (trend removed). Defaults to the language's currency." }, "language": { "enum": [ "de", "en", "es", "fr", "id", "ja", "ko", "pt-BR", "th", "vi", "zh-Hans", "zh-Hant" ], "type": "string", "default": "en", "description": "Language of the page the returned url opens; match the user's language." }, "annual_return_pct": { "type": "number", "default": 5, "maximum": 50, "minimum": 0, "description": "Annual return, compounded monthly." }, "inflation_percent": { "type": "number", "maximum": 20, "minimum": 0, "description": "Annual inflation. When given, every amount out is in today's money at this rate; omitted, amounts are nominal." } } }arguments 86 linessimulate_portfolio unknown 56m ago
Monte Carlo simulation of investing monthly (plus an optional starting sum) in one asset or a mix rebalanced monthly. Returns the range of outcomes by year (10th to 90th percentile), the deepest fall along the way, the mix's own past return and volatility, and a compoundsim.app url that shows the same scenario.
{ "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "portfolio", "monthly" ], "properties": { "years": { "type": "integer", "default": 20, "maximum": 60, "minimum": 1, "description": "Years of investing." }, "history": { "enum": [ "5", "10", "20", "all" ], "type": "string", "default": "all", "description": "The span of past monthly returns the model is fitted to: the last 5, 10 or 20 years, or all the data. An asset with less data than the span asked for uses all of its own." }, "initial": { "type": "number", "default": 0, "maximum": 1000000000000, "minimum": 0, "description": "Starting sum invested at once." }, "monthly": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "Amount invested at the end of every month." }, "currency": { "enum": [ "USD", "EUR", "JPY", "GBP", "CNY", "CHF", "AUD", "CAD", "HKD", "SGD", "KRW", "INR", "TWD", "BRL", "THB", "IDR", "PHP", "MYR", "VND" ], "type": "string", "description": "Currency of every amount, in and out. In a currency other than USD the paths carry its exchange-rate swings against the dollar (trend removed). Defaults to the language's currency." }, "language": { "enum": [ "de", "en", "es", "fr", "id", "ja", "ko", "pt-BR", "th", "vi", "zh-Hans", "zh-Hant" ], "type": "string", "default": "en", "description": "Language of the page the returned url opens; match the user's language." }, "portfolio": { "anyOf": [ { "enum": [ "sixtyForty", "allCountry", "allWeather" ], "type": "string" }, { "type": "object", "properties": { "agg": { "type": "number", "maximum": 100, "minimum": 0 }, "btc": { "type": "number", "maximum": 100, "minimum": 0 }, "eem": { "type": "number", "maximum": 100, "minimum": 0 }, "efa": { "type": "number", "maximum": 100, "minimum": 0 }, "gld": { "type": "number", "maximum": 100, "minimum": 0 }, "shy": { "type": "number", "maximum": 100, "minimum": 0 }, "sox": { "type": "number", "maximum": 100, "minimum": 0 }, "tlt": { "type": "number", "maximum": 100, "minimum": 0 }, "vnq": { "type": "number", "maximum": 100, "minimum": 0 }, "acwi": { "type": "number", "maximum": 100, "minimum": 0 }, "schd": { "type": "number", "maximum": 100, "minimum": 0 }, "sp500": { "type": "number", "maximum": 100, "minimum": 0 }, "ndx100": { "type": "number", "maximum": 100, "minimum": 0 } }, "additionalProperties": false } ], "description": "A preset name or weights in percent by asset (any total; they are scaled to 100). Assets: sp500 = S&P 500, ndx100 = Nasdaq 100, sox = SOX (Semiconductors), schd = US dividend stocks (SCHD), acwi = MSCI ACWI, efa = Developed ex-US stocks, eem = Emerging market stocks, vnq = US REITs, gld = Gold, shy = US 1–3 year Treasuries, agg = US aggregate bonds, tlt = US long-term Treasuries, btc = Bitcoin. Presets: sixtyForty = sp500 60% + agg 40%; allCountry = acwi 100%; allWeather = sp500 30% + tlt 40% + shy 15% + gld 15%." }, "history_to": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "Last calendar year of a custom span." }, "history_from": { "type": "integer", "maximum": 2026, "minimum": 1994, "description": "First calendar year of a custom span (with history_to); replaces history." }, "inflation_percent": { "type": "number", "maximum": 20, "minimum": 0, "description": "Annual inflation. When given, every amount out is in today's money at this rate; omitted, amounts are nominal." } } }arguments 187 lines
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