Entropy MCP Server

Verifiable commit-reveal. operation selects the step: commit -- hash a seed, bind it to draw_spec {operation, params}, attest via Stamp. The seed is returned to the caller and never stored. reveal -- verify a seed against commitment_id, re-execute the draw deterministically, attest the outcome. draw -- commit + execute + reveal in one call. Pass draw_spec, or operation + params directly. verify -- pure third-party verification of commitment_record + reveal_record. No local state. list -- read-only view of the local commitment log (limit, since).

Bandit arm selection: epsilon_greedy, thompson, or ucb1. Stateless -- caller passes state in as {arm: {pulls, successes, total_reward}} and gets a selection back. params: {epsilon} for epsilon_greedy.

Direct randomness. operation selects the primitive: bytes -- raw CSPRNG bytes. params: {count<=4096, encoding: hex|base64} int -- unbiased integers in [min,max] via rejection sampling. params: {min, max, count<=10000} shuffle -- Fisher-Yates; permutation[i] is the original index now at position i. params: {items, return_permutation} choose -- k items, weighted or not, with/without replacement. params: {items, k, weights, replacement} sample -- named distributions: uniform, normal, lognormal, exponential, triangular, beta. params: {distribution, params, n<=10000} constrained -- records with independently sampled attributes + chi-squared conformance proof. params: {attributes: {attr: {value: prop}}, n} seed (top level) makes any operation reproducible.

Statistical battery over a sequence: frequency, chi-squared, runs, longest run, serial correlation, Shannon entropy, KS, gap test. Informed by NIST SP 800-22; no certification claimed. sequence is a list of numbers, list of strings, or a hex/base64 byte string.