One knowledge base. Every AI tool.
Hjarni has a built-in MCP server. Pick the AI tool you already use. The config snippet on each page is two minutes of setup.
Hjarni for Claude
Long-term memory for Claude.ai, Claude Desktop, and Claude iOS.
Hjarni for ChatGPT
Connect Hjarni in the ChatGPT Apps Directory or developer mode.
Hjarni for Cursor
Give your AI editor the architecture context that is not in the repo.
Hjarni for Claude Code
One CLI command. OAuth in the browser. Hjarni in every session.
Hjarni for Windsurf
Cascade can search, read, and write your knowledge base directly.
Hjarni for Cline
Hjarni as a remote MCP server in the Cline VS Code panel.
Free to start. No credit card required.
One knowledge base, many clients
Pick any tool. Switch later. Bring your notes.
Every page above points at the same Hjarni MCP server. The same notes, folders, and tags show up in Claude today and Cursor tomorrow. There is no per-tool data to migrate.
Using a remote MCP client that is not listed? The endpoint is https://hjarni.com/mcp with OAuth. Config shapes vary by client (some want url, some want serverUrl, some use a CLI). The MCP Config Validator can sanity-check a config before you save it.
From a founder
Hjarni ran the whole Labeur launch. Scope decisions, landing page copy, App Store submission, launch day checklist, all in one place and all in sync with Claude. I stopped re-explaining myself to the AI. From first sketch to live in the store.
Related pages
Write once. You both remember.
Free to start. No credit card required.
Give your AI a memoryWorks with Claude and ChatGPT today. Gemini coming soon.