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The real catalog of tools for AI agents

Google tells you what exists. Faceabot tells you what holds up.

44,737real tools
29,284callable over HTTPS
19,887measured
6,168proven reliable
MonsiTools Calculators Reliable (measured) · 100% over 43 checks Does the job (tested) · 43/43

Find and run exact business, finance and SaaS calculators instead of guessing the math.

MCP endpoint : https://monsitools.com/mcp · website · measurements and details
Uncertainty Calculator Being measured · 50% over 2 checks

Evaluate mathematical expressions and propagate measurement uncertainty.

MCP endpoint : https://uncertaintycalculator.com/api/mcp · website · measurements and details
SparkQuote NEC calculators Reliable (measured) · 100% over 15 checks Fails real tasks · 0/15

NEC 2023 electrical calculators: wire size, ampacity, voltage drop, conduit fill, box fill, load.

MCP endpoint : https://sparkquote.ai/mcp · website · measurements and details
databutler-stats Reliable (measured) · 100% over 17 checks Does the job (tested) · 17/17

Exact statistics & probability: distributions, hypothesis tests, CIs, Bayesian updates, regression.

MCP endpoint : https://databutler.dev/api/mcp/stats · website · measurements and details
Kalkulo.eu calculators Flaky · 86% over 7 checks Does the job (tested) · 6/6

Read-only European tax, salary and benefit calculators with official sources and unknowns.

MCP endpoint : https://kalkulo.eu/mcp · website · measurements and details
530A Model calculator Flaky · 89% over 9 checks Does the job (tested) · 8/8

Free, deterministic 530A (Trump Account) projections, verified rules, and searchable guides.

MCP endpoint : https://mcp.530amodel.com · website · measurements and details
Jackpot Calculator Reliable (measured) · 100% over 19 checks Does the job (tested) · 19/19

Estimate US lottery taxes, compare cash and annuity, split pool prizes and calculate jackpot odds.

MCP endpoint : https://jackpot-calculator-mcp.jiankn.workers.dev/mcp · website · measurements and details
Hacé Cuentas — Free Calculators Flaky · 75% over 4 checks

Free calculators as MCP tools: finance, taxes, health, units, dates. Search, fetch & compute.

MCP endpoint : https://hacecuentas.com/mcp · website · measurements and details
HomeCalc — Canadian Mortgage & Tax Calculators Reliable (measured) · 100% over 12 checks Does the job (tested) · 12/12

Canadian mortgage, tax & land transfer calculators: 12 read-only tools, LTT for all 13 provinces.

MCP endpoint : https://homecalc.ca/api/mcp · website · measurements and details
SavingsLast retirement calculators Flaky · 96% over 22 checks Does the job (tested) · 21/21

Retirement drawdown, 72(t) SEPP, RMD, Roth conversion, Social Security and state-tax calculators.

MCP endpoint : https://savingslast.com/mcp · website · measurements and details
CalcBright Calculators Being measured · 0% over 1 checks

160+ calculators: take-home pay for 166 countries, mortgage, loan, VAT, BMI, dates, units, currency.

MCP endpoint : https://calcbright.com/mcp · website · measurements and details
Klar Calculators Private (key required)

Jordan & GCC labour-law, tax and finance calculators for AI agents — 36 deterministic tools.

MCP endpoint : https://mcp.worldly.pro/mcp · website · measurements and details
FinFam Financial Calculators Being measured · 0% over 2 checks

Free financial calculators (rent vs buy, mortgage, retirement) plus the FinFam Pulse money digest.

MCP endpoint : https://ff-api.finfam.app/mcp/mcp · website · measurements and details
Home Repairs Estimator — Cost Calculators Reliable (measured) · 100% over 43 checks Does the job (tested) · 42/42

Deterministic cost calculators for HVAC, roofing, plumbing, electrical, solar, water heater.

MCP endpoint : https://homerepairsestimator.com/mcp · website · measurements and details
agiscorecard-web3-evidence Reliable (measured) · 100% over 31 checks Does the job (tested) · 31/31

Review agent task evidence with sample deduplication, version filters and uncertainty intervals.

MCP endpoint : https://evidence.agiscorecard.com/mcp · website · measurements and details
crosstabs-mcp Not measured yet

Statistical crosstab analysis: chi-square, Fisher's exact, odds ratio, effect sizes

Package pypi : crosstabs-mcp · website · measurements and details
Scientific Math Calculator MCP Private (key required)

Safe scientific calculator MCP for numeric expressions

MCP endpoint : https://mcp.nexlab.net/mcp/scientific-math-calculator · website · measurements and details
Artvinci's frame calculator Flaky · 86% over 7 checks Does the job (tested) · 6/6

Artvinci's frame and estimated price calculator

MCP endpoint : https://mcp.archstone.dev/d/kz63hcokp5djyhkedjrlt72dvm/mcp · website · measurements and details
0s and 1s CIS calculators Reliable (measured) · 100% over 3 checks Does the job (tested) · 3/3

Free UK CIS calculators: deductions, deadlines, late penalties, gross payment test, verification.

MCP endpoint : https://0sand1s.co.uk/mcp · website · measurements and details
Totally Tarot Calculators Being measured · 100% over 2 checks Real task being tested · 0/2

Astrology charts, Maya calendar and tarot maths, computed on real engines, cited in every answer.

MCP endpoint : https://totallytarot.net/mcp · website · measurements and details

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

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