{"servers":[{"server":{"$schema":"https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json","name":"dev.costheta/costheta","description":"Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions.","title":"costheta","repository":{"url":"https://github.com/costhetadev/costheta-verify","source":"github"},"version":"0.1.0","websiteUrl":"https://costheta.dev","remotes":[{"type":"streamable-http","url":"https://costheta.dev/mcp"}],"_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."}}}},"_meta":{"io.modelcontextprotocol.registry/official":{"status":"active","statusChangedAt":"2026-08-12T08:20:11.052457Z","publishedAt":"2026-08-12T08:20:11.052457Z","updatedAt":"2026-08-12T08:20:11.052457Z","isLatest":true}}}],"metadata":{"count":1}}