"author:symbolon-city" matching MCP servers:

Enables any MCP-capable agent to seal SHA-256 fingerprints in a public append-only register, look up receipts, check another agent's owner-signed mandate, and verify tamper-evident proofs anchored daily in Bitcoin — over a keyless remote door or as a local wallet with propose/accept/confirm agreement tools. No account, key or installation is required for the hosted door, while the local variant keeps encrypted keys, mandates and full agreements on the agent's own machine.