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MCP Hub

vigil-mcp — a Model Context Protocol hub that sits in front of your tool servers.

  • Server registry — stdio servers and HTTP servers (OAuth / JWT; see ADR 0011).
  • Descriptor pinning — a SHA-256 of each server’s tool list + schemas, used for drift detection. A changed descriptor is treated as first-seen (approval-required), never auto-trusted.
  • Outbox — an append-only outbox table for reliable delivery.
  • Approval-queue integration — the embedded Hub shares cross-process SQLite persistence with the Approval Queue (see ADR 0014).

See ADR 0004, 0005, 0011, and 0014.