Your notes. Every conversation.
The AI-native knowledge base for Claude
Keep your plans, decisions, and project history in Hjarni. Ask Claude to check the saved notes whenever you pick up the work.
25 notes free, forever. No credit card required.
Hjarni has its own native apps. Free on every plan for iPhone, iPad and Mac and Android. Same account, same notes as the web. An internet connection is required.
Claude
Project context
You: Save this in Hjarni: our launch is October 22, with a €2,000 budget.
Hjarni · Create Note
Claude: Saved your launch plan in Hjarni. You can ask for it in a new chat.
New conversation
You: Check Hjarni. When is our launch?
Hjarni · Search
Claude: Your launch plan says October 22, with a €2,000 budget.
Connect once
Connect Claude in about two minutes
Use your existing Claude account. Check the directory listing for availability; Team and Enterprise workspaces may need an admin to enable the connector.
Nothing to paste and no config file: the listing opens in your browser, and Connect runs the OAuth sign-in. Prefer to add it by hand? The full Claude guide covers the custom-connector route.
Open Hjarni in Claude-
Open Hjarni in Claude and click Connect.
-
Sign in to Hjarni when prompted, or create a free account, then authorize the connection.
-
Start a chat, open + → Connectors, switch Hjarni on, and ask: ‘Help me save a note in Hjarni about the project I'm working on. Ask me what you need to know first.’
-
Open a new chat with Hjarni enabled and ask: ‘Check Hjarni and remind me what I'm working on.’ When something changes, ask Claude to update that note.
Put your notes to work
Workflows that actually use your context
Summarize a quarter of meeting notes in one prompt
Ask Claude to read every note in your Meetings folder from the last 90 days and write a one-page summary. No file uploads. No re-pasting.
Pick up Monday where Friday ended
Open a fresh chat and ask Claude to continue the project plan. It searches Hjarni for the latest plan note, reads it, and resumes from where you stopped writing.
Draft from your own customer interviews
Tell Claude to find your customer interview notes tagged 'pricing' and rewrite the positioning doc with quotes from those interviews, not from generic startup advice.
Save the decision the moment it's made
End a brainstorm with 'save this as a note in Hjarni under Strategy and tag it adr'. In the next chat, ask Claude to check that note for what you decided and why.
Why Hjarni instead of Claude Projects or a local folder
A Markdown folder on your laptop is invisible to Claude.ai in the browser and to Claude iOS on the train. Hjarni is hosted, so the same notes show up in every Claude client you sign into. One knowledge base, every Claude surface.
Claude Projects give Claude a workspace per project. Useful, but the context lives inside Claude and stays there. Hjarni keeps the knowledge on your side, so when ChatGPT or Cursor joins the workflow they read the same notes through MCP.
Folder-level AI instructions in Hjarni let you tell Claude how to behave per project: 'in the Customers folder, quote interviews verbatim; in the Strategy folder, never invent metrics.' That is the part a vector database cannot do.
Common questions
Questions before you connect Claude
Does Hjarni store my notes locally on Claude?
No. Claude does not store your notes. Hjarni stores them. Claude retrieves them through MCP when it uses Hjarni, prompted by your request or its instructions, and the OAuth connection can be revoked at any time.
Which Claude clients support the Hjarni MCP server?
Claude.ai, Claude iOS, Claude Desktop, and Claude Code all support remote MCP servers. Claude.ai and the iOS app use OAuth. Claude Code uses the CLI. Hjarni works with all of them.
What does Claude see compared to what Hjarni sees?
Hjarni sees every note in your account. Claude only sees what it explicitly requests during a conversation. Most messages pull in a few notes through search, not your entire knowledge base.
Is the Hjarni MCP integration free?
Yes. Hjarni's free plan includes the connection and up to 25 notes. You use your own Claude account, with Claude's usage limits. Open the Hjarni directory listing to check availability; Team and Enterprise workspaces may require an admin to enable it. See Claude’s connector guide.
Can I use the same knowledge base with both Claude and ChatGPT?
Yes. The same Hjarni account works with any MCP client. Connect Claude and ChatGPT in parallel and they both read from the same notes.
Start here
Write once. You both remember.
25 notes free, forever. No credit card required.
Works with Claude, ChatGPT, Cursor and any MCP client.