# Services from math-stats.x402tookit.com on Zero

> math-stats.x402tookit.com serves 10 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/math-stats.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/math-stats.x402tookit.com/health.json

## Services

- [Prime Factorization and Number Theory Analysis](https://www.zero.xyz/c/prime-factorization-and-number-theory-analysis-24870f29/llms.txt): $0.02/call via x402. Performs primality testing and prime factorization of integers up to 10^19, returning factors, divisor count, divisor sum, Euler totient, and number type classification.
- [Math and Statistics – Descriptive Statistics](https://www.zero.xyz/c/math-and-statistics-descriptive-statistics-d182fe01/llms.txt): $0.02/call via x402. Computes descriptive statistics for a list of numbers: mean, median, mode, spread, quartiles, outliers, skewness, and kurtosis.
- [Sample Size Calculator (Survey & A/B Test)](https://www.zero.xyz/c/sample-size-calculator-survey-a-b-test-e1ea39e0/llms.txt): $0.02/call via x402. Calculates the required sample size for a survey (given margin of error) or an A/B test (given baseline conversion rate, target lift, and statistical power).
- [Math and Statistics – Combinatorics Calculator](https://www.zero.xyz/c/math-and-statistics-combinatorics-calculator-36dcd26b/llms.txt): $0.02/call via x402. Computes exact combinatorial counts—factorial, combinations, permutations, repetition variants, derangements, and Catalan numbers—as arbitrary-precision big integers.
- [GCD, LCM, Bézout Coefficients & Modular Inverse](https://www.zero.xyz/c/gcd-lcm-b-zout-coefficients-modular-inverse-deb354aa/llms.txt): $0.02/call via x402. Computes greatest common divisor, least common multiple, Bézout coefficients, and modular inverse for a list of 2–20 integers of arbitrary size.
- [Correlation & Regression Analysis](https://www.zero.xyz/c/correlation-regression-analysis-c4e9bb2e/llms.txt): $0.02/call via x402. Computes Pearson and Spearman correlations with p-values, fits a least-squares regression line, returns R-squared, and optionally predicts a y-value for a given x.
- [Welch T-Test (Two-Sample & One-Sample)](https://www.zero.xyz/c/welch-t-test-two-sample-one-sample-dd037c4c/llms.txt): $0.02/call via x402. Performs a Welch two-sample or one-sample t-test, returning t statistic, degrees of freedom, p-value, confidence interval, and Cohen's d effect size.
- [Statistical Distribution Calculator (PDF, CDF, Quantile)](https://www.zero.xyz/c/statistical-distribution-calculator-pdf-cdf-quantile-6ad1dbf3/llms.txt): $0.02/call via x402. Computes probability density/mass, cumulative probability, survival probability, and quantiles for normal, binomial, Poisson, and Student t distributions.
- [Confidence Interval Calculator (Mean & Proportion)](https://www.zero.xyz/c/confidence-interval-calculator-mean-proportion-68b1f35b/llms.txt): $0.02/call via x402. Computes confidence intervals for a mean (t-interval from a data list) or a proportion (Wilson and Wald methods from successes and trials count).
- [A/B Test Statistical Significance Calculator](https://www.zero.xyz/c/a-b-test-statistical-significance-calculator-1d4da3c8/llms.txt): $0.02/call via x402. Computes conversion rates, relative lift, two-proportion z-test p-value, confidence interval, and a significance verdict for an A/B experiment.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)