Raziel Calculators is answering right now. Last checked 11 min ago. It exposes 28 tools.
Free investment and startup math, guide search and prompts: IRR, MOIC, SAFE, QSBS, burn multiple.
Uptime history
24 hours of history
24 hours agonow
100.0%
Uptime 24h
88 of 88 checks
28
Tools
read from the server
213 ms
Response time
average over 24h
open, no key
Access
streamable-http
Nothing serious here today
Today is the operative word: we check Raziel Calculators every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.
run in your terminal
claude mcp add calculators --transport http https://raziel.co/mcpSettings → Connectors → Add custom connector, then paste this address
https://raziel.co/mcp~/.codex/config.toml
[mcp_servers.calculators]
url = "https://raziel.co/mcp".cursor/mcp.json
{
"mcpServers": {
"calculators": {
"url": "https://raziel.co/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"calculators": {
"type": "http",
"url": "https://raziel.co/mcp"
}
}
}Available tools 28
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
burn
burn_multiple
Capital efficiency: net burn divided by net new ARR over the same period (a quarter or a year). Lower is better. Returns the multiple and a rough band (under 1 amazing, 1 to 1.5 great, 1.5 to 2 good, 2 to 3 suspect, over 3 bad, a rule of thumb popularized by David Sacks). Use rule_of_40 for growth versus profitability instead. Guide: https://raziel.co/learn/importance-startup-burn-rate
cac
cac_payback
Months of gross profit needed to earn back the cost of acquiring a customer: CAC / (monthly revenue per account x gross margin). Give cac_usd directly, or sales_marketing_spend_usd and new_customers for the same period. Many SaaS investors look for roughly 12 to 18 months or less, shorter for SMB. Use ltv_cac to also see lifetime value. Guide: https://raziel.co/learn/unit-economics-early-stage-startups
cagr
cagr
Compound annual growth rate between a start value and an end value over a number of years. Use for growth of a single value (revenue, an asset price); use irr or xirr when there are multiple cash flows. Interactive version: https://raziel.co/tools/cagr-calculator
cap
cap_rate
Capitalization rate of an income property (net operating income / property value), plus gross rent multiplier and price per unit. Give noi_usd directly or gross income and operating expenses. Use cash_on_cash when financing matters. Interactive version: https://raziel.co/tools/cap-rate-calculator
carried
carried_interest
European (whole-fund) distribution waterfall: management fees, return of capital, preferred return (hurdle), GP catch-up and carried interest split, with LP net multiple and the gross-to-net drag. Interactive version: https://raziel.co/tools/carried-interest-calculator
cash
cash_on_cash
Leveraged rental property returns: mortgage payment, NOI, annual cash flow, cash on cash return, DSCR and break-even occupancy. Use cap_rate for an unlevered view of the same property. Interactive version: https://raziel.co/tools/cash-on-cash-return-calculator
compare
compare_platforms
Researched, sourced comparison of Raziel with another investing or startup platform (Addepar, Allocations, AngelList, Cake Equity, Carta, Empower, Eqvista, Foundersuite, getquin, Juniper Square, Kubera, Ledgy, Masttro, Pulley, Seraf, Sharesight, spreadsheets, Sydecar, Visible, Vyzer): pricing, feature coverage, key differences, where the other platform is stronger, and sources. Pass "list" to see every platform. Facts are as of the research date in the result.
convertible
convertible_note
How a convertible note converts in a priced round: accrued interest, conversion price (cap vs discount), shares received and effective discount. Use safe_conversion for SAFEs, which have no interest. Interactive version: https://raziel.co/tools/convertible-note-calculator
define
define_term
Plain-English definition of a private-market, venture or fund term (pro rata, MFN, liquidation preference, valuation cap, DPI, TVPI, carried interest, hurdle, capital call, NAV, K-1, QSBS, 83(b), 409A, drag-along, ROFR and about 33 more), with a link to the Raziel guide or calculator. Pass "list" to get every term. Use search_guides for longer explanations.
dilution
dilution
Founder and investor ownership across several future funding rounds, including option pool top-ups before each round. Use option_pool for a single round when the question is how a pre-money pool shifts value, and startup_valuation for one simple round. Interactive version: https://raziel.co/tools/dilution-calculator
guides
search_guides
Searches Raziel's 550 Learn articles on private investing, startups, funds and founder topics (SAFEs, cap tables, K-1s, capital calls, QSBS, investor updates and more). Returns titles, URLs, summaries and matching section headings to cite. Use define_term for a one-line definition instead.
irr
irr
Internal rate of return for evenly spaced yearly cash flows after an initial investment. Use xirr instead when cash flows have specific dates or irregular timing. Interactive version: https://raziel.co/tools/irr-calculator
liquidation
liquidation_preference
Exit waterfall: how sale proceeds split between preferred series and common, with preference multiples, non-participating, participating or capped participation, and stacked or pari passu seniority. Each series converts to common when that pays more. Interactive version: https://raziel.co/tools/liquidation-preference-calculator
ltv
ltv_cac
Customer lifetime value (monthly revenue per account x gross margin / monthly churn) compared with customer acquisition cost. Returns LTV, the LTV:CAC ratio and CAC payback months. Around 3:1 or better is a commonly cited target. Use cac_payback when you only need the payback period. Guide: https://raziel.co/learn/unit-economics-early-stage-startups
moic
moic
Multiple on invested capital: total value returned (distributions plus current value) divided by the amount invested, with the implied annualized return when a holding period is given. Use tvpi_dpi for fund-level LP multiples. Interactive version: https://raziel.co/tools/moic-calculator
net
net_revenue_retention
Net revenue retention (NRR) and gross revenue retention (GRR) for a cohort of existing customers over a period, usually 12 months: (starting revenue + expansion - contraction - churn) / starting revenue. Above 100% NRR means existing customers grow on their own. Exclude revenue from new customers. Guide: https://raziel.co/learn/evaluating-startup-traction-metrics
option
option_pool
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 ownership the pre-money pool costs versus adding it after the round. Interactive version: https://raziel.co/tools/option-pool-calculator
portfolio
portfolio_allocation
Allocation of a portfolio across asset classes (stocks, bonds, real estate, crypto, venture capital, private equity, cash, other), with a simple diversification score and a concentration read. Holdings in the same class are summed. Interactive version: https://raziel.co/tools/portfolio-allocation
pro
pro_rata
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 check, and the value of the stake at the new post-money. Interactive version: https://raziel.co/tools/pro-rata-calculator
qsbs
qsbs
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 year exclusions and the $15M cap for stock acquired after July 4, 2025). Assumes the stock otherwise qualifies. Interactive version: https://raziel.co/tools/qsbs-calculator
rule
rule_of_40
Adds revenue growth rate and profit margin (usually EBITDA or free cash flow margin, both in percent). A score of 40 or more is the common rule of thumb for a healthy software company balancing growth and profitability. Use burn_multiple for capital efficiency instead. Guide: https://raziel.co/learn/startup-traction-analysis-metrics
runway
runway
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 the break-even month and whether the company is default alive within 10 years. Interactive version: https://raziel.co/tools/runway-calculator
safe
safe_conversion
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 ownership after the round, including an option pool top-up. Use convertible_note for notes that accrue interest. Interactive version: https://raziel.co/tools/safe-conversion-calculator
secondary
secondary_sale
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, net proceeds, gain over cost basis and the implied company valuation. Interactive version: https://raziel.co/tools/secondary-sale-calculator
startup
startup_valuation
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 founder dilution. Use dilution for several rounds and option_pool for pool math. Interactive version: https://raziel.co/tools/startup-valuation-calculator
tax
tax_deadlines
Key US equity tax dates. stock_grant_date: the 83(b) election deadline, 30 days after restricted stock is transferred (rolled to the next business day when the 30th day is a weekend or legal holiday). qsbs_acquired_date: the Section 1202 holding-period milestones (50%, 75% and 100% exclusion at 3, 4 and 5 years for stock acquired after July 4, 2025; 5 years before). Give either or both. Use qsbs for the dollar exclusion on a sale. Interactive version: https://raziel.co/tools/qsbs-calculator
tvpi
tvpi_dpi
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). Use moic for a single deal and xirr for time-weighted returns. Interactive version: https://raziel.co/tools/tvpi-dpi-calculator
xirr
xirr
Annualized return (XIRR) for cash flows on specific dates, like Excel XIRR. Use this for real investments with irregular timing (capital calls, distributions, follow-ons); use irr only for evenly spaced yearly flows. Interactive version: https://raziel.co/tools/xirr-calculator
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://raziel.co/mcp | streamable-http | answering | 204 ms | 11 min ago |
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Raziel Calculators — questions
Answers built from our own checks of this server.
What can Raziel Calculators do?
It exposes 28 tools, read directly from the server on our last check. Among them: burn_multiple, cac_payback, cagr, cap_rate, carried_interest, cash_on_cash and 22 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is Raziel Calculators working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 88 of 88 checks got a reply (100.0%), average response time 213 ms. The bar chart above shows every period we have measured.
How do I connect Raziel Calculators?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Raziel Calculators need an API key?
No. Raziel Calculators completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 28 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Raziel Calculators?
It answers our handshake in 213 ms on average, which is faster than 66% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.