Vault Cortex MCP server

Vault Cortex is a helper that connects your AI assistant to your Obsidian vault. Once it is set up, your AI can search your notes, read them, and even add or change notes for you. It is handy if you keep your thoughts, projects, or research in Obsidian and want your AI to work with that same pile of notes.

What this MCP server does

You ask your AI a question about your notes, like what you wrote about a project. Your AI sends that request to Vault Cortex. Vault Cortex searches your vault using both exact words and meaning, so it finds notes even when you used different wording. It sends the matching notes back to your AI, which reads them and answers you. If you ask it to, it can also write new notes or update existing ones in your vault.

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What you can do with it

• Search your vault by keyword or by meaning
• Read a specific note or a whole folder of notes
• Create new notes and edit existing ones
• Look at your tasks and move them between statuses
• Complete a task, and let a repeating task create its next copy
• See which notes link to each other and find notes nothing links to
• Read non-note files like images, PDFs, and canvases
• Keep a dated memory of your views on a topic over time

Try asking your AI

• “What did I write about the Q3 launch plan?”
• “Add a note called Meeting notes for today with these bullet points”
• “Show me all my open tasks that are due this week”
• “What do I think about switching to a four day work week, and how has my view changed?”

What it gives back to you

You get answers in plain chat, built from your own notes. For searches, your AI shows the matching notes and often quotes the relevant lines. For tasks, you get a list grouped by status, date, or priority. When it writes or changes something, it tells you which note it touched so you can check it in Obsidian.

Before you start

Who it's for

People who keep notes, projects, or research in Obsidian and want their AI assistant to read and update that vault for them.