Obsidian MCP Server

Model Context Protocol (MCP) server for accessing Obsidian vaults. This server enables AI assistants like Claude to read, search, and interact with your Obsidian notes.

Features

Core Operations

• Read Notes: Access individual notes with frontmatter and content

• Write Notes: Create, update, append, and delete notes

• Search: Search notes by content, title, tags, or frontmatter properties

• List Notes: Browse notes with filtering options

Link Analysis

• Backlinks: Find all notes that link to a specific note

• Outgoing Links: Get all links from a note to other notes

• Link Graph: Build a network graph of all note connections

• Related Notes: Discover notes related by shared links and tags

• Orphaned Notes: Find notes with no incoming or outgoing links

Tag Management

• List All Tags: Get all tags with usage counts

• Filter by Tag: Find all notes with a specific tag

• Tag Statistics: Analyze tag usage across the vault

Daily Notes

• Get Daily Note: Retrieve or create daily notes by date

• List Daily Notes: Browse recent daily notes

• Auto-creation: Automatically create daily notes with proper formatting

Templates

• List Templates: Browse available templates

• Create from Template: Generate new notes from templates

• Variable Replacement: Support for {{date}}, {{time}}, {{title}} placeholders

Google Calendar Integration (Optional)

• Create Calendar Events: Create Google Calendar events linked to notes

• List Events: Browse upcoming calendar events

• Delete Events: Remove calendar events and update note metadata

• Bidirectional Linking: Events link to notes via obsidian:// URLs

• Auto-metadata: Calendar event details stored in note frontmatter

Vault Statistics

• Vault Stats: Total notes, tags, size, and distribution

• Search by Property: Query notes by frontmatter fields

Security & Performance

• Path Traversal Protection: Prevent access outside vault

• Input Validation: Comprehensive validation of all inputs

• Optimized Search: Fast search with caching

• Safe Deletion: Trash folder support (reversible deletes)

Requirements

• Python 3.10 or higher

• An Obsidian vault

Installation

Using uv (Recommended)

Using pip

Configuration

Using .env File (Recommended)

Create a .env file in the project root:

Example .env:

Using Environment Variables

Alternatively, set environment variables directly:

Google Calendar Integration (Optional)

To enable Google Calendar integration:

1. Enable Google Calendar API

1. Go to Google Cloud Console

2. Create a new project or select an existing one

3. Enable the Google Calendar API

4. Go to Credentials → Create Credentials → OAuth client ID

5. Configure OAuth consent screen if prompted

6. Select Application type: Desktop app

7. Download the credentials as credentials.json

2. Configure Credentials

Important: Replace YourVaultName with your actual Obsidian vault name (found in Obsidian Settings → About).

3. Scope to a Specific Calendar (Optional)

By default, the integration uses your primary calendar (GOOGLE_CALENDAR_ID=primary). To scope operations to a specific calendar:

Get your Calendar ID:

1. Go to Google Calendar

2. Click settings gear → Settings

3. Select the calendar you want to use (left sidebar)

4. Scroll to Integrate calendar section

5. Copy the Calendar ID (e.g., work@group.calendar.google.com)

Configure it:

Important: While OAuth grants access to all your calendars, the MCP server will ONLY create, read, update, and delete events in the configured calendar. All calendar operations respect this setting for safety.

4. First-Time Authorization

When you first use a calendar tool, the server will:

1. Open your browser for Google OAuth authorization

2. Ask you to grant calendar access permissions

3. Save the token to .credentials/token.json for future use

Security Notes:

• The server uses scope https://www.googleapis.com/auth/calendar.events (events only, no calendar management)

• Token file is automatically protected with 600 permissions

• Both credentials.json and .credentials/ are gitignored

5. Event-Note Linking

Created calendar events include:

• Obsidian deep link in event description (clickable in Google Calendar)

• Event metadata in note frontmatter:

  --- calendar_event_id: "abc123..." calendar_event_link: "https://www.google.com/calendar/event?eid=..." calendar_event_date: "2025-01-15" calendar_event_time: "14:00" ---

Claude Desktop Integration

Add to your Claude Desktop configuration (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

Or using the installed script directly:

Usage

Available Tools

The server exposes 27 MCP tools organized by category:

Read Operations

read_note - Read the full content of a note

• path (string): Relative path to the note (e.g., "Projects/MCP.md")

search_notes - Search the vault by content, title, tags, or all

• query (string): Search query

• search_type (string): "content", "title", "tags", or "all" (default: "all")

• folder (string): Limit search to folder

• limit (number): Max results (default: 20)

list_notes - List notes in the vault with optional filters

• folder (string): Folder to list (empty for root)

• recursive (boolean): Include subfolders (default: true)

• limit (number): Max results (default: 100)

Link Analysis

get_backlinks - Get all notes that link to a specific note (incoming links)

• path (string): Relative path to the note

get_outgoing_links - Get all links from a note to other notes (outgoing links)

• path (string): Relative path to the note

get_related_notes - Find notes related to a specific note based on shared links and tags

• path (string): Relative path to the note

• limit (number): Maximum number of related notes (default: 10)

get_orphaned_notes - Find notes with no incoming or outgoing links

• limit (number): Maximum number of results (default: 50)

Tag Operations

list_all_tags - Get all tags in the vault with usage counts

• limit (number): Maximum number of tags to return (default: 100)

get_notes_by_tag - Find all notes with a specific tag

• tag (string): Tag to search for (with or without #)

• limit (number): Maximum number of results (default: 50)

Search & Query

search_by_property - Search for notes by frontmatter property (metadata field)

• property_name (string): Name of the frontmatter property to search

• property_value (string): Optional value to match (empty to find all notes with this property)

• limit (number): Maximum number of results (default: 50)

Statistics

get_vault_stats - Get statistics about the vault

• Returns total notes, tags, size, and top tags

Write Operations

create_note - Create a new note in the vault

• path (string): Relative path for the new note (e.g., "Projects/New Idea.md")

• content (string): Content of the note

• tags (list[string]): Optional list of tags to add to frontmatter

• overwrite (boolean): If true, overwrite existing note (default: false)

update_note - Update an existing note's content (preserves frontmatter)

• path (string): Relative path to the note

• content (string): New content for the note body

append_to_note - Append content to the end of an existing note

• path (string): Relative path to the note

• content (string): Content to append

delete_note - Delete a note (moves to .trash by default)

• path (string): Relative path to the note

• permanent (boolean): If true, permanently delete; otherwise move to .trash folder (default: false)

update_frontmatter - Update frontmatter fields in a note (preserves content)

• path (string): Relative path to the note

• property_name (string): Name of the frontmatter field

• property_value (string): Value to set

Batch Operations

batch_update_notes - Update multiple notes atomically with automatic backup/rollback

• updates (list): Array of objects with {path, content, frontmatter?} structure

• dry_run (boolean): Preview changes without applying (default: false)

• confirm (boolean): Must be true to apply changes (safety check)

batch_append_notes - Append content to multiple notes atomically

• appends (list): Array of objects with {path, content} structure

• confirm (boolean): Must be true to apply changes

restore_batch_backup - Restore notes from a batch backup (undo operation)

• backup_id (string): Backup timestamp ID (e.g., "20250115_143025")

list_batch_backups - List available batch backups

• limit (number): Maximum number of backups to list (default: 10)

See docs/BATCH_OPERATIONS.md for complete guide with examples.

Daily Notes

get_daily_note - Get or create a daily note for a specific date

• date_str (string): Date in YYYY-MM-DD format (empty for today)

• folder (string): Folder where daily notes are stored (default: "Daily Notes")

• create (boolean): If true, create the note if it doesn't exist (default: true)

list_daily_notes - List recent daily notes

• folder (string): Folder where daily notes are stored (default: "Daily Notes")

• limit (number): Maximum number of notes (default: 30)

Templates

list_templates - List available note templates

• folder (string): Folder where templates are stored (default: "Templates")

create_from_template - Create a new note from a template

• template_path (string): Path to the template note

• new_note_path (string): Path for the new note

• title (string): Optional title to replace {{title}} placeholder

Graph & Network

get_link_graph - Get the link graph for the vault (nodes and edges for visualization)

• max_notes (number): Maximum number of notes to include (default: 500)

Google Calendar (Optional)

create_calendar_event - Create a Google Calendar event linked to a note

• note_path (string): Path to the note to link (e.g., "Projects/Meeting.md")

• title (string): Event title

• date (string): Event date in YYYY-MM-DD format (e.g., "2025-01-15")

• time (string): Event time in HH:MM format (e.g., "14:00")

• duration_minutes (number): Event duration in minutes (default: 60)

• description (string): Optional event description

• confirm (boolean): Must be true to confirm creation (safety check)

list_calendar_events - List upcoming calendar events

• max_results (number): Maximum number of events (default: 10)

• days_ahead (number): Number of days to look ahead (default: 7)

get_calendar_event - Get details of a specific calendar event

• event_id (string): Calendar event ID

search_calendar_events - Search calendar events by text query or date range

• query (string): Text to search for in event title/description (optional)

• date_from (string): Start date YYYY-MM-DD (default: today)

• date_to (string): End date YYYY-MM-DD (default: 30 days from date_from)

• max_results (number): Maximum number of events (default: 20)

update_calendar_event - Update/move a calendar event

• event_id (string): Calendar event ID to update

• title (string): New event title (optional)

• date (string): New date YYYY-MM-DD (optional)

• time (string): New time HH:MM (optional)

• duration_minutes (number): New duration in minutes (optional)

• description (string): New description (optional)

• location (string): New location (optional)

• confirm (boolean): Must be true to confirm update (safety check)

delete_calendar_event - Delete a calendar event

• event_id (string): Calendar event ID

• update_note (boolean): If true, remove event info from linked note (default: true)

• confirm (boolean): Must be true to confirm deletion (safety check)

Development

Setup Development Environment

Code Quality

Testing

Project Structure

Security

Safe by Design

The server is designed to work safely within your Obsidian vault:

• Access is restricted to your configured vault directory only

• Cannot access files outside the vault (including through symbolic links)

• All file operations are validated before execution

• Batch operations create backups before making changes and restore them if any operation fails

Best Practices

1. Separate Vault: Consider using a separate vault for AI access

2. Exclude Sensitive Folders: Configure exclude_folders in your setup

3. Use Batch Operations: When editing multiple notes, use batch operations to get automatic backups before changes and automatic restore if anything fails

4. Regular Backups: Always maintain backups of your vault

Troubleshooting

Server Not Starting

Problem: "OBSIDIAN_VAULT_PATH environment variable must be set"

Solution: Set the vault path in your environment or Claude config.

No Notes Found

Problem: Search or list returns no results

Solution:

• Check that the vault path is correct

• Ensure notes have .md extension

• Check that folders aren't in the exclude list

Path Security Errors

Problem: "Path attempts to access files outside vault"

Solution: Use relative paths only (e.g., "folder/note.md" not "/absolute/path")

Unicode Errors

Problem: Errors reading notes with special characters

Solution: Ensure notes are saved as UTF-8 in Obsidian

Google Calendar Issues

Calendar Not Authorized

Problem: "Calendar credentials not found" or OAuth not starting

Solution:

• Verify GOOGLE_CALENDAR_CREDENTIALS_PATH points to valid credentials.json

• Delete .credentials/token.json and re-authorize

• Check file permissions on credentials

Wrong Calendar Modified

Problem: Events created in wrong calendar

Solution:

• Verify GOOGLE_CALENDAR_ID in .env matches your intended calendar

• Get correct Calendar ID from Google Calendar Settings → Integrate calendar

• Restart Claude Desktop after changing .env

• See Calendar Guide for detailed instructions

Permission Denied

Problem: "Insufficient permission" when creating/updating events

Solution:

• Re-authorize with correct scope: delete .credentials/token.json and retry

• Verify OAuth consent screen includes calendar.events scope

• Check you have edit permissions on the target calendar

Obsidian Links Not Working

Problem: Clicking event in Google Calendar doesn't open note

Solution:

• Verify OBSIDIAN_VAULT_URL_BASE exactly matches your vault name (Settings → About)

• Include proper format: obsidian://open?vault=VaultName&file=

• Check vault name capitalization and spaces

• Ensure Obsidian is installed and vault is open

For complete calendar documentation, see docs/CALENDAR.md and docs/EXAMPLES.md.

Limitations

• File Types: Only .md and .canvas files by default

• No Live Updates: Changes to vault require server restart to reflect in list operations

• Link Resolution: Basic wikilink resolution (no support for aliases yet)

• Batch Size: Batch operations limited to 50 notes per operation

Roadmap

• Write operations (create, update, delete notes)

• Backlinks and forward links support

• Daily notes integration

• Template system

• Graph data resources

• Google Calendar integration with bidirectional linking

• Batch operations with async I/O optimization

• Real-time vault monitoring

• Canvas file support improvements

• Attachment handling

• Advanced link resolution (aliases, headings)

• Caching for improved performance

Contributing

Contributions are welcome! Please:

1. Fork the repository

2. Create a feature branch

3. Write tests for new functionality

4. Ensure all tests pass (make test-all)

5. Run quality checks (make quality)

6. Submit a pull request

License

MIT License - see LICENSE file for details

Acknowledgments

• Built with Model Context Protocol

• Designed for Obsidian

• Inspired by the knowledge management community