AltoIndex Claude Desktop Extension

Connect Claude to your Apple Notes, Mail, Calendar, Reminders, and Messages through AltoIndex.

Privacy Policy

https://altoindex.com/privacy

Prerequisites

  1. AltoIndex app installed and running on macOS
  2. MCP server started from within the app (Integrations tab)
  3. Claude Desktop application

Installation

From Claude Desktop (when available in directory)

  1. Open Claude Desktop Settings > Extensions
  2. Search for "AltoIndex"
  3. Click Install

Manual Installation

  1. Download the extension from https://altoindex.com/extension
  2. Open Claude Desktop Settings > Extensions
  3. Click "Install Extension" and select the downloaded file

Usage Examples

Example 1: Find meeting notes

Ask Claude: "Search my notes for anything about the Q4 planning meeting"

Claude will use the search tool to find relevant notes:

Using search tool with source="notes" query="Q4 planning meeting"

Result: Claude returns matching notes with previews and can read full content on request.

Example 2: Check recent activity across all apps

Ask Claude: "What have I been working on in the last few days?"

Claude will use the get_recent tool:

Using get_recent tool with limit=20

Result: Claude shows your most recently modified notes, reminders, calendar events, and messages.

Example 3: Read a specific note

Ask Claude: "Read my note called Project Ideas"

Claude will use the read tool:

Using read tool with source="notes" id="Project_Ideas"

Result: Claude returns the full content of the note including any metadata.

Available Tools

Tool Description
list List items from notes, reminders, messages, or events
search Search for content within a specific source
read Read the full content of a specific item
get_metadata Get counts and last sync times for each source
get_recent Get recently modified items across all sources

All tools are read-only and do not modify your data.

Architecture

Claude Desktop <--(stdio)--> bridge.js <--(HTTP)--> AltoIndex MCP Server (localhost:8743)

The extension bridges Claude Desktop's stdio protocol to AltoIndex's local HTTP server.

Troubleshooting

"Cannot connect to AltoIndex"

  • Make sure AltoIndex app is running
  • Check that MCP server is started (green indicator in the Integrations tab)
  • Verify port 8743 is not blocked

No data returned

  • Ensure you've synced your data sources in AltoIndex
  • Check that export folder is configured in AltoIndex settings

Support

Version 3 · Created Jan 26, 2026 · Modified Aug 27, 2026
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