compoundsim
REMOTE · COMPOUNDSIM.APP
Compound interest and Monte Carlo simulators for investing, retirement and past asset returns.
Available components
Last scanned (8 hours ago)
Scores higher than 54% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability54
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1792 tokens (~358/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management13
- Stability observed for 4 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
Checks we ran (13)
- TLS certificate
- Authorization
- HTTPS
- HSTS header
- DNSSEC
- Transport
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 0
- Stability: unverified → 0.03 ▲ functional
- “simulate_fixed_rate” reworded the description of “annual_return_pct” cosmetic
- 1 Nov 26 68
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://compoundsim.app/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=compoundsim.app | CN=WE1,O=Google Trust Services,C=US | 14 Oct 2026 | 12 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 3af8526fb71deac80e317ff07da9a22a |
| SANs: compoundsim.app, *.compoundsim.app | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of compoundsim.app. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| app. | DS published | 23684 | 8 | Verified |
| compoundsim.app. | No DS | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://compoundsim.app/mcp | Verified | 200 | |
| http (plaintext) | http://compoundsim.app/mcp | HTTPS enforced | 301 | https://compoundsim.app/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
compare_portfolios Compare portfolios side by side ~293
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?'.
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | 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. |
| history | string | – | 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. |
| history_from | integer | – | First calendar year of a custom span (with history_to); replaces history. |
| history_to | integer | – | Last calendar year of a custom span. |
| inflation_percent | number | – | Annual inflation. When given, every amount out is in today's money at this rate; omitted, amounts are nominal. |
| initial | number | – | Starting sum invested at once. |
| language | string | – | Language of the page the returned url opens; match the user's language. |
| monthly | number | yes | Amount invested at the end of every month. |
| portfolios | array | yes | The portfolios to compare. |
| years | integer | – | Years of investing. |
No output schema declared.
No examples provided.
get_asset_returns Past annualised returns of assets ~243
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).
| Name | Type | Req | Description |
|---|---|---|---|
| assets | array | – | Assets to include; all of them when omitted. |
| currency | string | – | 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 | string | – | Language of the page the returned url opens; match the user's language. |
| period | string | – | 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. |
| period_from | integer | – | First calendar year of a custom span (with period_to); replaces period. |
| period_to | integer | – | Last calendar year of a custom span. |
No output schema declared.
No examples provided.
simulate_fixed_rate Compound interest at a fixed rate ~210
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.
| Name | Type | Req | Description |
|---|---|---|---|
| annual_return_pct | number | – | Effective annual return (CAGR), applied as the equivalent monthly rate. |
| currency | string | – | 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. |
| inflation_percent | number | – | Annual inflation. When given, every amount out is in today's money at this rate; omitted, amounts are nominal. |
| initial | number | – | Starting sum invested at once. |
| language | string | – | Language of the page the returned url opens; match the user's language. |
| monthly | number | yes | Amount invested at the end of every month. |
| years | integer | – | Years of investing. |
No output schema declared.
No examples provided.
simulate_portfolio Simulate monthly investing in a portfolio ~471
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.
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | 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. |
| history | string | – | 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. |
| history_from | integer | – | First calendar year of a custom span (with history_to); replaces history. |
| history_to | integer | – | Last calendar year of a custom span. |
| inflation_percent | number | – | Annual inflation. When given, every amount out is in today's money at this rate; omitted, amounts are nominal. |
| initial | number | – | Starting sum invested at once. |
| language | string | – | Language of the page the returned url opens; match the user's language. |
| monthly | number | yes | Amount invested at the end of every month. |
| portfolio | – | yes | 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 = MS… |
| years | integer | – | Years of investing. |
No output schema declared.
No examples provided.
simulate_withdrawal Simulate spending down a portfolio in retirement ~479
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.
| Name | Type | Req | Description |
|---|---|---|---|
| balance | number | yes | Starting balance. |
| currency | string | – | 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. |
| history | string | – | 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. |
| history_from | integer | – | First calendar year of a custom span (with history_to); replaces history. |
| history_to | integer | – | Last calendar year of a custom span. |
| inflation_percent | number | – | Annual inflation the withdrawals rise with; balances are in today's money. |
| language | string | – | Language of the page the returned url opens; match the user's language. |
| portfolio | – | yes | 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 = MS… |
| withdrawal_rate_pct | number | – | First year's withdrawal as a percentage of the starting balance. |
| years | integer | – | Years the money has to last. |
No output schema declared.
No examples provided.
How do I install the compoundsim MCP server?
compoundsim is a hosted endpoint at https://compoundsim.app/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · compoundsim.app
claude mcp add --transport http app-compoundsim-compoundsim 'https://compoundsim.app/mcp'
What is the compoundsim MCP server?
compoundsim is an MCP server listed in the public MCP registry as app.compoundsim/compoundsim. Compound interest and Monte Carlo simulators for investing, retirement and past asset returns. This page covers its hosted endpoint (https://compoundsim.app/mcp).
Is the compoundsim MCP server safe to use?
compoundsim scores 69 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the compoundsim MCP server expose?
compoundsim exposes 5 tools: simulate_portfolio, compare_portfolios, simulate_withdrawal, simulate_fixed_rate, get_asset_returns. Their descriptions and schemas cost roughly 1,696 tokens of context every time the server is loaded.
Does the compoundsim MCP server require authentication?
No. We connected to compoundsim without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the compoundsim MCP server still maintained?
compoundsim is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What did VerifyMCP test on the compoundsim MCP server?
VerifyMCP ran 13 checks on compoundsim, covering TLS certificate, Authorization, HTTPS, HSTS header and 9 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.