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Directory / Raziel Calculators

Raziel Calculators

Q: Is Raziel Calculators MCP server safe?

QAmcp's test on 1 Nov 2026: None of the hidden-instruction wordings we know were found in its tool descriptions. Its error messages showed no secrets or internal details. All 28 of its tools are labeled read-only. Overall it scored 95/100 on 1 Nov 2026. A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

by raziel.co · https://raziel.co/mcp

Free investment and startup math, guide search and prompts: IRR, MOIC, SAFE, QSBS, burn multiple.

28 tools✓ all read-only✓ no account neededPricing: on their site

See pricing →Visit website

95 /100

PASS · WITH NOTES

12 of 12 checks · 1 Nov 2026

Is Raziel Calculators MCP server safe?

None of the hidden-instruction wordings we know were found in its tool descriptions.
Its error messages showed no secrets or internal details.
All 28 of its tools are labeled read-only.
Overall it scored 95/100 on 1 Nov 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What it can do

28 tools, in the server's own words.

irrread-only

Internal rate of return for evenly spaced yearly cash flows after an initial investment.

xirrread-only

Annualized return (XIRR) for cash flows on specific dates, like Excel XIRR.

moicread-only

Multiple on invested capital: total value returned (distributions plus current value) divided by the amount invested, with the implied annualized return when a…

cagrread-only

Compound annual growth rate between a start value and an end value over a number of years.

tvpi_dpiread-only

Fund performance multiples for an LP or a fund: TVPI (total value to paid-in), DPI (distributions to paid-in, realized) and RVPI (NAV to paid-in, unrealized).

carried_interestread-only

European (whole-fund) distribution waterfall: management fees, return of capital, preferred return (hurdle), GP catch-up and carried interest split, with LP ne…

safe_conversionread-only

How a YC-style SAFE (post-money or pre-money) converts in a priced equity round: conversion price, whether the cap or discount applies, shares issued and owner…

convertible_noteread-only

How a convertible note converts in a priced round: accrued interest, conversion price (cap vs discount), shares received and effective discount.

startup_valuationread-only

Pre-money to post-money for a single priced round: post-money valuation, price per share, new shares issued, investor ownership (investment / post-money) and f…

dilutionread-only

Founder and investor ownership across several future funding rounds, including option pool top-ups before each round.

option_poolread-only

The "option pool shuffle" for one round: how much the pool must grow to hit a post-money target, the effective pre-money valuation, and how much founder owners…

pro_rataread-only

For an existing investor in a new round: the check needed to keep the same ownership (pro rata), ownership after the round if they skip or write a planned chec…

liquidation_preferenceread-only

Exit waterfall: how sale proceeds split between preferred series and common, with preference multiples, non-participating, participating or capped participatio…

secondary_saleread-only

Proceeds from selling private company shares on the secondary market: sale price after a discount (or premium) to the last round price or a valuation, fees, ne…

qsbsread-only

Estimates the US federal capital gains exclusion for qualified small business stock under IRC Section 1202, including the July 2025 changes (tiered 3, 4 and 5 …

tax_deadlinesread-only

Key US equity tax dates.

runwayread-only

Months of cash runway for a startup, either from a monthly net burn ("burn" mode) or from monthly revenue and expenses with growth rates ("pl" mode), including…

cap_rateread-only

Capitalization rate of an income property (net operating income / property value), plus gross rent multiplier and price per unit.

cash_on_cashread-only

Leveraged rental property returns: mortgage payment, NOI, annual cash flow, cash on cash return, DSCR and break-even occupancy.

portfolio_allocationread-only

Allocation of a portfolio across asset classes (stocks, bonds, real estate, crypto, venture capital, private equity, cash, other), with a simple diversificatio…

burn_multipleread-only

Capital efficiency: net burn divided by net new ARR over the same period (a quarter or a year).

rule_of_40read-only

Adds revenue growth rate and profit margin (usually EBITDA or free cash flow margin, both in percent).

ltv_cacread-only

Customer lifetime value (monthly revenue per account x gross margin / monthly churn) compared with customer acquisition cost.

cac_paybackread-only

Months of gross profit needed to earn back the cost of acquiring a customer: CAC / (monthly revenue per account x gross margin).

and 4 more

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-06-18). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
✓
ConnectsConnected in 281 ms
pass
✓
Lists its toolsFound 28 tools
pass
✓
Every tool is describedAll 28 tools and their inputs are described
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
pass
✓
Tools work with good inputs
All good
- ✓irr: Answered with an error, probably because of our sample input: Error: "initial_investment_usd" must be greater than 0.
- ✓xirr: Answered with an error, probably because of our sample input: Error: "cash_flows" needs at least 2 items.
- ✓moic: Answered with an error, probably because of our sample input: Error: "invested_usd" must be greater than 0.
- ✓cagr: Answered with an error, probably because of our sample input: Error: "start_value_usd" must be greater than 0.
- ✓tvpi_dpi: Answered with an error, probably because of our sample input: Error: "paid_in_usd" must be greater than 0.
- ✓carried_interest: Answered with an error, probably because of our sample input: Error: "fund_size_usd" must be greater than 0.
- ✓safe_conversion: Answered with an error, probably because of our sample input: Error: "investment_usd" must be greater than 0.
- ✓convertible_note: Answered with an error, probably because of our sample input: Error: "principal_usd" must be greater than 0.
- and 20 more
pass
✓
Bad inputs give a clean error
All good
- ✓irr: Refused missing required input "initial_investment_usd" with a clear error
- ✓irr: Refused wrong type for "initial_investment_usd" with a clear error
- ✓xirr: Refused missing required input "cash_flows" with a clear error
- ✓xirr: Refused wrong type for "cash_flows" with a clear error
- ✓moic: Refused missing required input "invested_usd" with a clear error
- ✓moic: Refused wrong type for "invested_usd" with a clear error
- ✓cagr: Refused missing required input "start_value_usd" with a clear error
- ✓cagr: Refused wrong type for "start_value_usd" with a clear error
- and 32 more
pass
✓
Fast enough
All good
- ✓Connecting took 281 ms
- ✓Listing tools took 34 ms
- ✓Average tool answer: 23 ms
- ✓tvpi_dpi: Slowest tool: tvpi_dpi (43 ms)
pass
✓
No secrets leakedChecked 81 error messages: no secrets or internal details
pass
✓
Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guide
pass
✓
Resources and prompts workCould not list prompts: the server limited our requests (HTTP 429)
pass
–
Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://raziel.co/mcp

Show this score on GitHub

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Score over time

1 Nov 202695

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Raziel Calculators, signed in with GitHub, one per person. Reviews never change the score.

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