Long-term memory for Claude and ChatGPT
Give Claude or ChatGPT long-term memory with MCP
Save notes once in Hjarni. Connect with MCP. Claude and ChatGPT read your notes and remember what you told them, across every conversation.
Free to start. No credit card required.
The problem
Sound familiar?
Built-in memory keeps a few facts. Your notes, research and decisions are not in it.
You re-explain your project, your stack, your preferences. Again. Then again tomorrow.
Your notes live in ten places. Your AI can read none of them.
How it works
How to give Claude or ChatGPT long-term memory
Two steps. No plugins. No scripts.
01
Save notes once
Write in Markdown. Organize with notes, folders, tags. This is your knowledge base.
https://hjarni.com/mcpThat is the whole setup. Now Claude reads your notes. ChatGPT reads your notes. Ask either one anything and it answers with what you saved. Tell it to write a new note and the note is there next time. Write once, you both remember.
What it means
What "long-term memory" actually means here
This is not a chat-history trick. It is a knowledge base your AI reads live. You decide what goes in. notes, folders, tags. You can read it, edit it, and export it any time. It is plain Markdown you own.
Set instructions per folder. Tell Claude and ChatGPT how to format, what tags to use, what tone to write in. They follow your instructions.
Why a knowledge base
Why a knowledge base, not built-in memory
ChatGPT memory and Claude's memory both keep a compact profile of you inside one assistant. Neither reads the other's, and neither holds your notes, your research, or what your team decided.
Hjarni is the opposite. One knowledge base, both AIs, in a format you control. Give Claude long-term memory and give ChatGPT long-term memory from the same notes. No copying context between them.
The constraint is the feature
Simple on purpose
We left features out on purpose. No databases. No kanban boards. No page builders. Just notes, folders, tags, and an MCP server that works. The constraint is the feature.
Pricing
Free to start
25 notes free. No credit card required. No trials, no hidden fees.
How do I give Claude or ChatGPT long-term memory using MCP?
Create a free Hjarni knowledge base. Save a few notes in Markdown. Open Claude or ChatGPT, add the Hjarni MCP server once, and connect. From then on both read your notes and remember what you told them between sessions. You can also ask them to write new notes back to your knowledge base.
Start here
Write once. You both remember.
Free to start. No credit card required.
Works with Claude and ChatGPT today.