Apple Notes Webhooks & Events

Overview

Apple Notes has no webhook, pub/sub, or event streaming API. To detect changes, you must build your own event system using one of three approaches: (1) JXA polling that compares note snapshots at intervals, (2) file system events (FSEvents) on the NoteStore.sqlite database file for near-real-time change detection, or (3) Apple Shortcuts automations that trigger scripts when specific conditions are met. Each approach has different latency, reliability, and resource consumption tradeoffs.

Prerequisites

• An approved automation identity with read-only access to the intended account and folders.
• Durable event storage and deduplication before any downstream side effect.
• A scoped data policy: event records should use opaque note identifiers or salted hashes, not titles or note bodies.

Instructions

1. Use polling as the authoritative signal and regard FSEvents and Shortcuts as hints that trigger a new scoped poll.
2. Persist a cursor or snapshot only after a complete successful poll; retain the prior cursor on failure.
3. Deduplicate events by note identifier, change version, and handler before invoking exports, notifications, or other mutations.
4. Debounce file-system activity and never read, modify, or write Apple Notes' private SQLite files directly.

Approach 1: JXA Polling (Recommended)

// src/events/notes-watcher.ts
import { execSync } from "child_process";

interface NoteSnapshot { id: string; title: string; modified: string; }

let lastSnapshot: Map<string, string> = new Map();

function detectChanges(): { added: string[]; modified: string[]; deleted: string[] } {
  const current = JSON.parse(execSync(
    `osascript -l JavaScript -e 'JSON.stringify(Application("Notes").defaultAccount.notes().map(n => ({id: n.id(), title: n.name(), modified: n.modificationDate().toISOString()})))'`,
    { encoding: "utf8", timeout: 30000 }
  )) as NoteSnapshot[];

  const currentMap = new Map(current.map(n => [n.id, n.modified]));
  const added = current.filter(n => !lastSnapshot.has(n.id)).map(n => n.title);
  const modified = current.filter(n =>
    lastSnapshot.has(n.id) && lastSnapshot.get(n.id) !== n.modified
  ).map(n => n.title);
  const deleted = [...lastSnapshot.keys()].filter(id => !currentMap.has(id));

  lastSnapshot = currentMap;
  return { added, modified, deleted };
}

// Poll every 60 seconds
setInterval(() => {
  const changes = detectChanges();
  if (changes.added.length || changes.modified.length || changes.deleted.length) {
    console.log("Changes detected:", JSON.stringify(changes));
    // Trigger downstream actions: export, sync, notify
  }
}, 60000);

Approach 2: FSEvents on Notes Database

#!/bin/bash
# Watch the Notes database directory for changes (near real-time)
# This detects ANY change to the local Notes SQLite database
NOTES_DB_DIR="$HOME/Library/Group Containers/group.com.apple.notes"

# Using fswatch (install via: brew install fswatch)
fswatch -r "$NOTES_DB_DIR" | while read -r changed_file; do
  # Filter for actual database changes (ignore WAL/SHM churn)
  case "$changed_file" in
    *.sqlite)
      echo "$(date -Iseconds) Notes database changed: $changed_file"
      # Trigger your handler — but throttle to avoid rapid-fire
      # The DB changes frequently during sync; debounce by 5 seconds
      ;;
  esac
done

# Alternative: use macOS built-in log stream for Notes events
# log stream --predicate 'subsystem == "com.apple.notes"' --style compact

Approach 3: Shortcuts Automation Triggers

# Apple Shortcuts can trigger automations based on:
# - Time of day (run export at midnight)
# - App opens/closes (Notes.app launched)
# - Focus mode changes (work mode → sync work notes)

# Create a Shortcut that runs your script when Notes.app opens:
# 1. Shortcuts > Automations > App > Notes > "Is Opened"
# 2. Add "Run Shell Script" action:
#    osascript -l JavaScript /Users/you/scripts/on-notes-open.js

# Trigger a Shortcut from your scripts (for cross-app events):
shortcuts run "Notes Changed" --input-type text --input "$(date -Iseconds)"

Event Handler Pattern

// src/events/handler.ts
type NoteEvent = "added" | "modified" | "deleted";
type EventHandler = (event: NoteEvent, noteTitle: string) => void;

const handlers: EventHandler[] = [];

function onNoteChange(handler: EventHandler): void {
  handlers.push(handler);
}

function emitEvent(event: NoteEvent, title: string): void {
  handlers.forEach(h => h(event, title));
}

// Register handlers
onNoteChange((event, title) => {
  console.log(`[${event.toUpperCase()}] ${title}`);
});

onNoteChange((event, title) => {
  if (event === "added") {
    // Auto-export new notes to backup directory
    execSync(`shortcuts run "Export Note" --input-type text --input "${title}"`);
  }
});

Error Handling

Issue	Cause	Solution
Polling misses rapid changes	60s interval too slow for burst edits	Reduce interval to 15-30s; accept higher CPU usage
FSEvents fires too frequently	WAL/SHM file writes during normal sync	Debounce: ignore events within 5s of each other
False "deleted" events	Note moved between folders, not deleted	Track folder changes separately; verify deletion before acting
Polling timeout on large vaults	>10,000 notes exceeds osascript timeout	Use incremental approach: only check modificationDate
Shortcut automation unreliable	macOS may delay or skip automations	Use polling as primary; Shortcuts as supplementary trigger

Output

The watcher emits normalized added, modified, or deleted events with an opaque scoped identifier, observed timestamp, source, and deduplication result. It records handler failures separately and leaves the event pending for safe retry; no event payload should include a note body or title by default.

Examples

When a filesystem notification arrives, wait for the debounce interval, perform a read-only poll of the configured folder, persist any normalized changes, then let an idempotent worker process them. If the poll times out, retain the prior cursor and retry later rather than emitting inferred deletions.

Resources

• FSEvents Programming Guide
• Apple Shortcuts Automation
• Mac Automation Scripting Guide

Next Steps

For monitoring the health of your event system, see apple-notes-observability. For handling the events your watcher detects, see apple-notes-data-handling.