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Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions.
costheta is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 73/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding costheta to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
mcp add dev.costheta/costheta https://costheta.dev/mcpReview the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-08-12T08:20:11.052457Z",
"publishedAt": "2026-08-12T08:20:11.052457Z",
"statusChangedAt": "2026-08-12T08:20:11.052457Z"
}
},
"server": {
"name": "dev.costheta/costheta",
"_meta": {
"io.modelcontextprotocol.registry/publisher-provided": {
"full_description": "Verifiable physical randomness from cosmic-ray muon detections. Seal your options as a hash, the next detected muon determines the outcome, receive a certificate dual-signed with Ed25519 and ML-DSA. Free public beacon; paid decisions settled per call via x402 in USDC, no account or API key. Throughput is bounded by physics: about one event every few seconds. Not for cryptographic key material. The certificate format supports multi-node attestation; the federation protocol is published as an open proposal. Today: one detector, one operator, one attestation per certificate.",
"tool_descriptions": {
"costheta_decide": "Paid commit-and-reveal decision. Send a hash of your options; the next detected muon selects one and you receive a publicly verifiable, dual-signed certificate binding your commitment to that physical event. Latency up to ~30 s. $0.02 via x402/USDC.",
"costheta_random": "Free public beacon. Random bits derived from muon arrival timestamps on the latest signed pulse. Shared by all callers until the next muon arrives; for private, request-bound outcomes use costheta_decide. Not for cryptographic keys.",
"costheta_witness": "Paid timestamp attestation. Binds any hash you send to the next detected muon and signs the pair: a timestamp anchored to a physical detection, not a server clock. $0.02 via x402/USDC."
}
}
},
"title": "costheta",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://costheta.dev/mcp",
"type": "streamable-http"
}
],
"version": "0.1.0",
"repository": {
"url": "https://github.com/costhetadev/costheta-verify",
"source": "github"
},
"websiteUrl": "https://costheta.dev",
"description": "Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions."
}
}