Use Hjarni with ChatGPT
Connect Hjarni to ChatGPT and it can search, create, and organize your notes directly.
Before you start
What ChatGPT gets
After you connect Hjarni, ChatGPT can use MCP to read and update the notes, containers, tags, instructions, and files your Hjarni account can access.
What ChatGPT does not get
It does not gain access before you authorize it, and it does not become your long-term memory unless you save things into Hjarni.
If you're evaluating trust, permissions, or ownership concerns before connecting, read privacy, permissions, and AI boundaries first.
What ChatGPT can do with Hjarni
Once connected, ChatGPT can:
Search notes
Full-text search across all your notes, containers, and tags.
Create notes
Create new notes with Markdown content, tags, and wiki-links.
Organize notes into containers
Place notes in the right folder, or create new folders.
Add tags
Tag notes for filtering and grouping.
Link notes
Create wiki-links between related notes.
Follow container instructions
Respect your custom AI instructions for specific folders and topics.
Requirements
How to connect ChatGPT to Hjarni
1. Enable developer mode
- Go to chatgpt.com > Settings > Connectors.
- Enable Developer mode.
2. Create the Hjarni app
- In the same Connectors settings, tap Create app.
- Set the name to
hjarni. - Set the MCP Server URL to
https://hjarni.com/mcp - Set authentication to OAuth.
- Check I understand and want to continue.
- Tap Create.
- Log in to Hjarni when redirected.
- Done. Ask ChatGPT about your notes.
ChatGPT handles authentication automatically through OAuth. No tokens to manage.
Verify the connection
After setup, ask ChatGPT one of these:
List my recent Hjarni notesSearch Hjarni for notes about weekly planningCreate a note in Hjarni called Test connection
If ChatGPT cannot see Hjarni tools, re-check that the MCP URL is exactly https://hjarni.com/mcp and that the OAuth flow completed successfully.
What workflows work best
Weekly planning
Ask ChatGPT to review your recent notes and draft a weekly summary or plan based on what you've captured.
Research capture
Paste an article or idea into the chat and have ChatGPT save it as a structured note with tags and links.
Project memory
Use a container for each project. ChatGPT reads existing notes for context before helping you think through problems.
Writing assistant with source notes
Ask ChatGPT to search your notes for relevant material, then draft a document using your own sources.
What ChatGPT can and cannot do
Can do
- Search, read, create, and update notes
- Delete notes (permanently)
- Organize notes in containers
- Add and manage tags
- Create wiki-links between notes
- Follow your custom AI instructions
- Attach files to notes
Cannot do
- Remember across conversations (use notes for that)
- Access notes without you connecting Hjarni first
- Bypass your permissions or instructions
- Act without asking. ChatGPT is instructed to confirm before placing or deleting notes
FAQ
Does Hjarni give ChatGPT long-term memory?
Not automatically. But when you save important information as notes, ChatGPT can search and retrieve it in future conversations. The notes act as your memory. ChatGPT is the interface.
Does Hjarni include its own AI model?
No. Hjarni is a knowledge base, not an AI model. It gives your existing AI assistant (ChatGPT, Claude) access to your notes through MCP.
Do I need a paid ChatGPT plan?
Yes. ChatGPT's MCP support requires a Plus, Pro, or Team plan. Hjarni itself works on any plan, including free.
Can ChatGPT edit existing notes?
Yes. ChatGPT can update the content, tags, container, and status of any existing note.
Related docs
Need help connecting?
Email [email protected] and we'll sort it out.