Docs

Set up Hjarni by talking to your LLM

Paste one URL into ChatGPT or Claude and let your AI handle the MCP connection, the folder structure, and the first notes.

Use Hjarni with ChatGPT

Set up Hjarni as a connector in ChatGPT and verify the connection.

Use Hjarni with Claude

Connect via Claude.ai, Claude iOS, Claude Desktop, or Claude Code.

Auto-capture Claude Code sessions

Wire a Claude Code Stop hook to the Hjarni API so every session becomes a note.

Auto-capture Codex CLI sessions

Same pattern for Codex: a Stop hook writes every session to Hjarni as a growing note.

Use Hjarni with OpenClaw

Give your OpenClaw agent access to your notes via MCP.

Use Hjarni with Zapier

Automate note creation from 9,000+ apps through Zapier.

Notes in Markdown

The storage model: body, summary, source URL, tags, links, files, and version history.

Containers and tags

Use containers for structure and tags for cross-cutting labels.

Wiki-links between notes

Bidirectional links so your AI can follow relationships, not just folders.

Custom AI instructions

Set global, personal, container, or team rules for how assistants should work.

Templates

Bootstrap a workspace structure through your connected assistant.

Teams and sharing

Team spaces, collaborators, and who can access what.

Single sign-on (Enterprise)

SAML 2.0 for login, SCIM 2.0 for provisioning. Works with Okta, Microsoft Entra, Auth0, and any SAML IdP.

Share a folder publicly

Turn any folder into a read-only public page. Sub-folders, notes, and attachments come with it.

Team audit log (Enterprise)

Per-team log of every view, edit, and access change across web, API, MCP, and public links. Available on request.

Privacy, permissions, and AI boundaries

What Hjarni does, what ChatGPT or Claude does, and what a connection grants.

Export and data ownership

What you can export, what format it uses, and what stays portable.

Import from Obsidian or Markdown

Bring your vault in with folders, wiki-links, and attachments intact.

Open Knowledge Format (OKF)

Export your knowledge as an OKF bundle: Markdown, YAML front-matter, folders, links, and a change log any AI agent can read. How OKF maps to Hjarni.

What is MCP?

Model Context Protocol explained: what it is, how it works, who supports it.

MCP vs API

APIs are for your code. MCP is for your AI. When to use each.

MCP vs Custom GPTs

Uploaded files go stale. MCP gives your AI a live connection to the source.

Connect any MCP server to ChatGPT

General guide for adding any MCP server to ChatGPT.

Connect any MCP server to Claude

General guide for adding any MCP server to Claude.ai, Desktop, or Code.

Connect GitHub Copilot to MCP

Add an MCP server to Copilot Chat in VS Code via mcp.json. Mind the servers key.

Connect Copilot Studio to MCP

Add a server to a Microsoft Copilot Studio agent through the MCP onboarding wizard, plus the streaming-timeout fixes.

Connect Perplexity to MCP

Add a custom MCP connector so Perplexity can read your own notes.

MCP reference

Transport, OAuth, tools, prompts, limits, and troubleshooting.

REST API reference

Authentication, pagination, endpoints, request shapes, and response examples.

MCP Config Validator

Paste a claude_desktop_config.json and catch JSON errors, missing fields, and typos in your browser.

MCP fixes

The configuration errors that show up the first time you wire an MCP server into Cursor, Claude Desktop, Claude Code, ChatGPT, or VS Code. Each page is a focused, copy-paste fix.

AI Glossary

Plain-language definitions for MCP, RAG, AI agents, second brains, and the terms that show up around them.

What is a second brain?

The concept, how AI changes it, and what to look for in a second brain app.

What is RAG?

Retrieval-Augmented Generation: how AI models look up your data before they answer, and where MCP fits.

What is an AI agent?

Models that pick tools, call them, and run in a loop. How agents differ from chatbots, and how memory keeps them useful between runs.

How to give your AI long-term memory

Stop re-explaining yourself. Connect your AI to an external knowledge base.