Official MCP RegistryListed

io.github.physics-star-cat/databutler-stats

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

First seen 2 Oct 2026. Evidence as of 4 Oct 2026.

Tools

From an anonymous probe

Source listings

Each with its own history

Recorded changes

Since first seen

Tools

Tool	Description	Behaviour
bayes_update	Discrete Bayesian update: given competing hypotheses each with a prior and the likelihood of the observed evidence, return normalised posteriors. Priors are renormalised to sum to 1.	Read-only
confidence_interval	Confidence interval for a mean (t-based; from data, or n/mean/sd) or a proportion (Wilson; successes/n). kind = mean \| proportion; confidence default 0.95.	Read-only
descriptive_stats	Summary statistics for a numeric array: mean, median, sd, variance, quartiles, IQR, skewness, min/max.	Read-only
distribution	Evaluate a probability distribution (normal, t, chi2, binomial, poisson): pdf/pmf and cdf at a value, and/or the quantile at a probability, plus mean & variance. Params per dist: normal {mean,sd}, t {df}, chi2 {df}, binomial {n,p}, poisson {lambda}.	Read-only
hypothesis_test	Run a significance test and get the statistic, p-value, and a plain-language interpretation with assumptions. test = one-sample-t {data, mu0}, two-sample-t {data1, data2}, one-proportion-z {successes, n, p0}, two-proportion-z {successes1,n1,successes2,n2}, chi2-gof {observed, expected?}, chi2-independence {table}. Optional tail: two-sided (default) \| greater \| less; alpha default 0.05.	Read-only
linear_regression	Simple linear regression of y on x: slope, intercept, r, r², slope std error and p-value, equation.	Read-only

Source listings
Source	Listing	First seen	Last seen	Versions
Official MCP Registry	io.github.physics-star-cat/databutler-stats	2 Oct 2026	3 Oct 2026	1

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