Nexus MCP for Obsidian

Nexus gives AI agents and built-in chat access to your Obsidian vault so you can read, write, search, organize, and automate notes in natural language while keeping storage local to the vault.

Nexus can be used in two ways:

• Inside Obsidian with native chat (hook up to your favorite provider or agentic platform!)

• From external agents like Claude Desktop, Claude Code, Codex CLI, Gemini CLI, Cursor, Cline, and other MCP clients

Nexus is the successor to Claudesidian. Legacy installs in .obsidian/plugins/claudesidian-mcp/ still work.

Setup

• Install the latest release from GitHub Releases: manifest.json, styles.css, and main.js

• Put them in .obsidian/plugins/nexus/ and enable Nexus in Obsidian

• Native chat in Obsidian: Provider setup and Native chat guide for chat, live voice, read-aloud, and built-in audio/video generation

• External agent over MCP: use Nexus settings -> Get started -> External agents to create connector.js and update Claude Desktop, then see MCP setup guide and Recommended system prompt

• External agent over CLI (no MCP config): install the nexus command from Get started -> External agents -> Local CLI so shell agents (Claude Code, Cursor, Codex) can drive your vault directly — see the Nexus CLI guide. Installation is user-triggered, writes only outside the vault, and on Windows adds the Nexus directory to the current user's PATH without administrator rights; uninstall removes only entries Nexus recorded as its own.

• Optional desktop features: Semantic search, Adaptive search, and Apps and integrations

Native chat works on desktop and mobile. MCP clients, local desktop providers, and semantic search are desktop-only.

Related MCP server: second-brain-mcp

Mobile Support (Experimental)

Native chat works on mobile (iOS and Android). Desktop-only features gracefully skip loading on mobile -- they will not appear or cause errors.

Mobile support is new and may have bugs. Please report issues on GitHub.

Use Cases

Prompt For Your Agent

If you want another agent to walk you through setup, paste this:

Help me set up Nexus for Obsidian and guide me step by step.

Use these docs as the source of truth:
- README: https://github.com/ProfSynapse/claudesidian-mcp/blob/main/README.md
- Provider setup: https://github.com/ProfSynapse/claudesidian-mcp/blob/main/guide/provider-setup.md
- MCP setup: https://github.com/ProfSynapse/claudesidian-mcp/blob/main/guide/mcp-setup.md
- Recommended system prompt: https://github.com/ProfSynapse/claudesidian-mcp/blob/main/guide/recommended-system-prompt.md
- Native chat guide: https://github.com/ProfSynapse/claudesidian-mcp/blob/main/guide/native-chat.md

Start by figuring out whether I want native chat inside Obsidian, an external MCP agent, or both. Ask for my OS and the agent I want to use if that matters. Then walk me through the exact setup path, one step at a time.

When a config file needs to be edited, show the exact snippet with my vault path inserted. Do not invent config formats or skip restart/reload steps. If multiple setup paths are possible, recommend the simplest one first.

More Guides

• Workspace memory

• Task management

• Semantic search

• Adaptive search

• Native chat

• Inline editing

• Apps

• Workflow examples

• Two-tool architecture

• Nexus CLI

Development

npm install
npm run dev
npm run build
npm run test
npm run lint

License

MIT. See LICENSE.