Passage Protocol

Overview

Passage Protocol is a Model Context Protocol (MCP) server: Departure and admission records for AI agents with Ed25519/P-256 signatures. Because it speaks the Model Context Protocol, AI assistants can use Passage Protocol as a set of callable tools instead of you copy-pasting between apps.

It runs locally: the npm package @cellar-door/mcp-server speaks MCP over stdio on your machine. No credentials are required — it works out of the box. The current release is v0.1.7.

On mcp.site, Passage Protocol sits in the AI & Agents category. Any MCP client can use it — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed among them — via the install snippets below. If you maintain Passage Protocol for hawthornhollows, claim this listing to verify ownership, earn the Verified badge, and keep the details current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "passage_protocol": {
      "command": "npx",
      "args": [
        "-y",
        "@cellar-door/mcp-server"
      ]
    }
  }
}