Volta Notes MCP server

@voltanotes/mcp

MCP server for Volta Notes — create and read burn-after-read encrypted notes from any AI agent.

Notes are end-to-end encrypted using AES-256-GCM. The decryption key lives only in the URL fragment — it is never sent to any server. Notes are stored on the Internet Computer and permanently destroyed after a single read.

Why

AI agents regularly need sensitive information at runtime — API keys, passwords, credentials. Today, users paste these into chat where they're stored permanently in conversation history.

With this MCP server, the pattern becomes:

1. User creates a note at voltanotes.com and sends the one-time URL
2. Agent calls readvoltanote — secret returned, note permanently destroyed
3. Nothing sensitive ever appears in chat history

Or in reverse — an agent can use createvoltanote to send credentials to a user via a self-destructing link.

Quick Start

Claude Code (CLI & Desktop App)

Step 1 — Install globally:

npm install -g @voltanotes/mcp

Step 2 — Register the server:

claude mcp add -s user volta -- node $(npm root -g)/@voltanotes/mcp/dist/index.js

That's it. Restart Claude Code and the createvoltanote and readvoltanote tools will be available.

Why claude mcp add instead of editing config files? Claude Code reads MCP servers from its own registry, not from ~/.claude/mcp.json. Using the CLI ensures the server is registered correctly. The -s user flag makes it available across all projects.

node not found? Use the full path: replace node with the output of which node (e.g. /usr/local/bin/node).

Claude Desktop (Standalone)

Add to your claudedesktopconfig.json:

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

Other MCP-compatible clients

The npx config above works with any client that supports the standard command/args MCP format — including Cursor, Windsurf, Cline, Continue.dev, and others. Check your client's MCP documentation for where to add server config.

Hermes Agent (Nous Research)

Volta MCP works with Hermes Agent via its MCP integration. Add the server to your Hermes config (~/.hermes/config.yaml):

mcp:
  servers:
    - name: volta
      command: npx
      args:
        - "-y"
        - "@voltanotes/mcp"

Restart Hermes and the createvoltanote and readvoltanote tools will be available to your agent.

Agent-to-agent use case: Hermes agents running autonomously often need to pass credentials between workflows without exposing them in logs or memory. Volta Notes is purpose-built for this — one agent creates a note, passes the one-time URL to the next, and the secret is destroyed on read. Nothing persists in conversation history or tool output logs.

See Hermes MCP documentation for full configuration options.

Windows (Claude Code CLI)

The $(npm root -g) syntax doesn't work in PowerShell or CMD. Use this instead:

claude mcp add -s user volta -- node "%APPDATA%\npm\node_modules\@voltanotes\mcp\dist\index.js"

Or use the Claude Desktop / npx method above, which works cross-platform.

Tools

createvoltanote

Creates an encrypted note and returns a one-time URL.

Shortened. The full README is on GitHub.