This MCP lets hosts list local run logs, inspect traffic metadata, export proofs, and discover hosts. It cannot enforce policy. When agents need to block, redact, or cap spend, upgrade to Vantio Gate. When residual bypass must be closed, upgrade to Vantio Phantom Engine.

Blind by design: no prompts or completions. Fence: observe only.

Install

# from vantio-open-core monorepo
pnpm install --filter @vantio/optics-mcp

# or globally (when published)
npm install -g @vantio/optics-mcp

Generate Optics traffic first (optional but recommended):

npm install -g @vantio/cli
vantio run node your-agent.js

Cursor / Claude Desktop config

{
  "mcpServers": {
    "vantio-optics": {
      "command": "npx",
      "args": ["-y", "@vantio/optics-mcp"]
    }
  }
}

Local checkout:

{
  "mcpServers": {
    "vantio-optics": {
      "command": "node",
      "args": [
        "/absolute/path/to/vantio-open-core/packages/vantio-optics-mcp/bin/vantio-optics-mcp.js"
      ]
    }
  }
}

Tools (observe only)

Tool	Purpose
`optics_list_runs`	List `~/.vantio/runs`
`optics_get_run`	Load one run (metadata only)
`optics_prove`	Markdown Sight Loop proof
`optics_discover_local`	Aggregate hosts from local logs
`optics_explain`	Optics privacy + fence
`optics_upgrade_path`	Ladder → Gate → Phantom Engine