MCP server for LogSeq

Connect Claude to your LogSeq knowledge base. Read, create, and manage pages — with optional semantic vector search and DB-mode graph support.

✨ What You Can Do

Transform your LogSeq knowledge base into an AI-powered workspace! This MCP server enables Claude to seamlessly interact with your LogSeq graphs.

🎯 Real-World Examples

📊 Intelligent Knowledge Management

"Analyze all my project notes from the past month and create a status summary"
"Find pages mentioning 'machine learning' and create a study roadmap"
"Search for incomplete tasks across all my pages"

📝 Automated Content Creation

"Create a new page called 'Today's Standup' with my meeting notes"
"Add today's progress update to my existing project timeline page"  
"Create a weekly review page from my recent notes"

🔍 Smart Research & Analysis

"Compare my notes on React vs Vue and highlight key differences"
"Find all references to 'customer feedback' and summarize themes"
"Create a knowledge map connecting related topics across pages"

🧠 Semantic Search (optional, requires vector setup)

"Find everything I wrote about burnout, even if I didn't use that word"
"What notes relate to my thoughts on deep work?"
"Search across my Dutch and English notes for ideas about productivity"

🤝 Meeting & Documentation Workflow

"Read my meeting notes and create individual task pages for each action item"
"Get my journal entries from this week and create a summary page"
"Search for 'Q4 planning' and organize all related content into a new overview page"

💡 Key Benefits

• Zero Context Switching: Claude works directly with your LogSeq data
• Preserve Your Workflow: No need to export or copy content manually
• Intelligent Organization: AI-powered page creation, linking, and search
• Enhanced Productivity: Automate repetitive knowledge work
• Semantic Vector Search (optional): Find notes by meaning using local Ollama embeddings — no data leaves your machine
• DB-mode Support (opt-in): Read and write class properties on Logseq DB-mode graphs

🚀 Quick Start

Step 1: Enable LogSeq API

1. Settings → Features → Check "Enable HTTP APIs server"
2. Click the API button (🔌) in LogSeq → "Start server"
3. Generate API token: API panel → "Authorization tokens" → Create new

Step 2: Add to Claude (No Installation Required!)

Claude Code

claude mcp add mcp-logseq \
  --env LOGSEQ_API_TOKEN=your_token_here \
  --env LOGSEQ_API_URL=http://localhost:12315 \
  -- uv run --with mcp-logseq mcp-logseq

Claude Desktop

Add to your config file (Settings → Developer → Edit Config):

{
  "mcpServers": {
    "mcp-logseq": {
      "command": "uv",
      "args": ["run", "--with", "mcp-logseq", "mcp-logseq"],
      "env": {
        "LOGSEQ_API_TOKEN": "your_token_here",
        "LOGSEQ_API_URL": "http://localhost:12315"
      }
    }
  }
}

Step 3: Start Using!

"Please help me organize my LogSeq notes. Show me what pages I have."

🔬 Vector Search (Optional)

Semantic search over your Logseq graph using local AI embeddings — find notes by meaning, not just keywords. Searches across all your pages using vector similarity and full-text search combined, with cross-language support.

Powered by Ollama (local embeddings) and LanceDB (embedded vector DB). No data leaves your machine.

→ Full setup guide: VECTOR_SEARCH.md

🛠️ Available Tools

The server provides 16 tools with intelligent markdown parsing, plus 3 optional vector search tools:

⚗️ Requires vector search setup — see VECTOR_SEARCH.md

🎨 Smart Markdown Parsing (v1.1.0+)

The create_page and update_page tools now automatically convert markdown into Logseq's native block structure:

Markdown Input:

---
tags: [project, active]
priority: high
---

# Project Overview
Introduction paragraph here.

## Tasks
- Task 1
  - Subtask A
  - Subtask B
- Task 2

## Code Example
```python
def hello():
    print("Hello Logseq!")
```

Result: Creates properly nested blocks with:

• ✅ Page properties from YAML frontmatter (tags, priority)
• ✅ Hierarchical sections from headings (#, ##, ###)
• ✅ Nested bullet lists with proper indentation
• ✅ Code blocks preserved as single blocks
• ✅ Checkbox support (- [ ] → TODO, - [x] → DONE)

Update Modes:

• append (default): Add new content after existing blocks
• replace: Clear page and replace with new content

🔁 Safe Retries & Large Writes

create_page fails with a clear error if a page with the same title already exists, instead of letting Logseq silently create numbered duplicates (Page(1), Page 2, ...). This makes retries after a timeout safe: if a previous create_page call timed out but actually committed, the retry tells you the page exists rather than fragmenting your content across ghost pages.

For large writes, prefer this pattern over one giant create_page call:

1. Create the page with little or no content (create_page with just the title and properties)
2. Append content in smaller chunks with update_page (mode: append)
3. Read back with get_page_content to verify the result

If you hit the "already exists" error mid-ingest, use get_page_content to see what landed, then continue with update_page instead of re-creating.

⚙️ Prerequisites

LogSeq Setup

• LogSeq installed and running
• HTTP APIs server enabled (Settings → Features)
• API server started (🔌 button → "Start server")
• API token generated (API panel → Authorization tokens)

System Requirements

• uv Python package manager
• MCP-compatible client (Claude Code, Claude Desktop, etc.)

🔧 Configuration

Environment Variables

• LOGSEQ_API_TOKEN (required): Your LogSeq API token
• LOGSEQ_API_URL (optional): Server URL (default: http://localhost:12315)
• LOGSEQ_API_CONNECT_TIMEOUT (optional): HTTP connect timeout in seconds (default: 3)
• LOGSEQ_API_READ_TIMEOUT (optional): HTTP read timeout in seconds (default: 6)
• LOGSEQ_DB_MODE (optional): Set to true to enable DB-mode property support. Only for Logseq DB-mode graphs (beta). Markdown/file-based graph users should leave this unset.
• LOGSEQ_EXCLUDE_TAGS (optional): Comma-separated tags — pages with these tags are hidden from all tools. See Privacy & Access Control below.
• LOGSEQ_INCLUDE_NAMESPACES (optional): Comma-separated namespace allow-list (e.g. work,projects). When set, only pages in these namespaces and their sub-pages are accessible — everything else, including top-level pages without a namespace, is hidden from listings/search and denied on direct access. See Privacy & Access Control below.
• LOGSEQ_EXCLUDE_NAMESPACES (optional): Comma-separated namespace deny-list (e.g. finance,work/secret). These namespaces are always blocked, taking priority over the include list. See Privacy & Access Control below.
• LOGSEQ_CONFIG_FILE (optional): Path to a shared JSON config file holding the graph path, ACL defaults, and the vector block. Env vars (LOGSEQ_EXCLUDE_TAGS, LOGSEQ_INCLUDE_NAMESPACES, LOGSEQ_EXCLUDE_NAMESPACES) override the matching keys in this file.
• MCP_HTTP_AUTH_TOKEN (required for --transport http): Bearer token clients must send as Authorization: Bearer <token>. The server refuses to start in HTTP mode without it. See Serving over HTTP.

Privacy & Access Control

Pages tagged with excluded tags are completely hidden from AI — they won't appear in listings, searches, or queries, and attempting to read them directly returns an access-denied error.

Quick setup via env var:

LOGSEQ_EXCLUDE_TAGS=private,secret

Via config file (also used for vector search):

{
  "logseq_graph_path": "/path/to/your/logseq/pages",
  "exclude_tags": ["private", "secret"]
}

Point to it with LOGSEQ_CONFIG_FILE=/path/to/config.json.

In your Logseq pages, tag any page you want to protect:

tags:: private

The exclusion applies to all tools: list_pages, get_page_content, search, query, and the optional vector search. If you also use vector search, exclude_tags at the root is automatically merged into the vector index exclusion list — private pages are never embedded.

Namespace access control

You can restrict access to specific namespaces using LOGSEQ_INCLUDE_NAMESPACES and LOGSEQ_EXCLUDE_NAMESPACES.

Include list (strict allow-list): Only the listed namespaces and their sub-pages are visible; everything else is hidden.

LOGSEQ_INCLUDE_NAMESPACES=work,projects

Exclude list (deny-list): The listed namespaces are always blocked, even if they appear in the include list.

LOGSEQ_EXCLUDE_NAMESPACES=work/secret,finance

Via config file:

{
  "include_namespaces": ["work", "projects"],
  "exclude_namespaces": ["work/secret", "finance"]
}

Matching is segment-based and case-insensitive: work matches work and work/projects but not workshop. The behavior mirrors LOGSEQ_EXCLUDE_TAGS: list/search results silently omit blocked pages; direct read, write, delete, and block operations return an access-denied error.

Access control is enforced at the page level and applied across every tool: list/search/query results omit blocked pages, direct page/block access and backlinks are denied, and vector search is filtered. Block-level results from search and query are resolved back to their owning page, so a block belonging to a restricted page is filtered out of those results too.

🌐 Serving over HTTP, multi-profile & TLS

By default the server speaks stdio — your client spawns it as a subprocess, and most users need nothing more. To serve sandboxed or remote clients over the network, mcp-logseq can run as a long-lived HTTP service with bearer auth, per-profile isolation, and TLS:

mcp-logseq --transport http --host 127.0.0.1 --port 12320   # requires MCP_HTTP_AUTH_TOKEN

The full deployment guide — the server-side security model, the per-profile multi-instance pattern, the separate logseq-sync writer, and native TLS / reverse-proxy setup — lives in docs/SERVING.md. Non-loopback binds over plain HTTP are refused unless you supply TLS or pass --insecure.

Alternative Setup Methods

Using .env file

# .env
LOGSEQ_API_TOKEN=your_token_here
LOGSEQ_API_URL=http://localhost:12315

System environment variables

export LOGSEQ_API_TOKEN=your_token_here
export LOGSEQ_API_URL=http://localhost:12315

🔍 Verification & Testing

Test LogSeq Connection

uv run --with mcp-logseq python -c "
from mcp_logseq.logseq import LogSeq
api = LogSeq(api_key='your_token')
print(f'Connected! Found {len(api.list_pages())} pages')
"

Verify MCP Registration

claude mcp list  # Should show mcp-logseq

Debug with MCP Inspector

npx @modelcontextprotocol/inspector uv run --with mcp-logseq mcp-logseq

🐛 Troubleshooting

Common Issues

"LOGSEQ_API_TOKEN environment variable required"

• ✅ Enable HTTP APIs in Settings → Features
• ✅ Click 🔌 button → "Start server" in LogSeq
• ✅ Generate token in API panel → Authorization tokens
• ✅ Verify token in your configuration

"spawn uv ENOENT" (Claude Desktop)

Claude Desktop can't find uv. Use the full path:

which uv  # Find your uv location

Update config with full path:

{
  "mcpServers": {
    "mcp-logseq": {
      "command": "/Users/username/.local/bin/uv",
      "args": ["run", "--with", "mcp-logseq", "mcp-logseq"],
      "env": { "LOGSEQ_API_TOKEN": "your_token_here" }
    }
  }
}

Common uv locations:

• Curl install: ~/.local/bin/uv
• Homebrew: /opt/homebrew/bin/uv
• Pip install: Check with which uv

Connection Issues

• ✅ Confirm LogSeq is running
• ✅ Verify API server is started (not just enabled)
• ✅ Check port 12315 is accessible
• ✅ Test with verification command above

👩‍💻 Development

For local development, testing, and contributing, see DEVELOPMENT.md.