Second Brain Os MCP Server
by undefined-uiAn AI second brain that maintains itself. Full guide, starter vault, agent skills and scripts for a self-organizing knowledge base in Claude Code and Obsidian.
Second Brain Os is an open-source mcp server by undefined-ui, written mainly in HTML, with 1,169 GitHub stars and the MIT license. Its code was last updated Oct 14, 2026.
Scan summary: scanned Nov 5, 2026 at commit 53aea82. Seen able to read environment and secrets. Scan policy
What Second Brain Os can touch
- Our checks did not find this. The tool may still do it.Run shell commandsNot seen in this scan
- Our checks did not find this. The tool may still do it.Run dynamic codeNot seen in this scan
- Our checks did not find this. The tool may still do it.Read or write filesNot seen in this scan
- Seen in this scan, either in the code or while it ran.Read environment and secretsFound in the code by our scan
- Our checks did not find this. The tool may still do it.Control a web browserNot seen in this scan
- Our checks did not find this. The tool may still do it.Connect to databasesNot seen in this scan
- Our checks did not find this. The tool may still do it.Read or send messagesNot seen in this scan
- Our checks did not find this. The tool may still do it.Touch money or tradingNot seen in this scan
- Our checks did not find this. The tool may still do it.Connect to the internetNot run in this scan
"Not seen" means our checks did not find it, and the tool may still do it. Covers commit 53aea82, Nov 5, 2026. See the scan policy.
Before you install Second Brain Os
AgenticMart scanned Second Brain Os on Nov 5, 2026 with automated checks for hidden code, known-malicious packages, leaked secrets and vulnerable dependencies. The result covers one commit under our scan policy, so review what access you give it and check any advisories shown here.
What it can access
- An MCP server is a program your AI app starts and talks to. A local one runs with your user's permissions: it can see the files, environment variables and network your account can.
Before you install
- Pin the version you reviewed instead of always installing the latest release.
- Read the tool list or scripts before the first run, and keep approval prompts on for actions that write, send or delete.
- Maintained by undefined-ui on GitHub, 1,169 stars and 196 forks. Popularity is not proof of safety.
- Last code change: Oct 14, 2026.
- Open-source license: MIT.
Second Brain Os is an open-source mcp server by undefined-ui, written mainly in HTML. An AI second brain that maintains itself. Full guide, starter vault, agent skills and scripts for a self-organizing knowledge base in Claude Code and Obsidian.
At a glance
- Stars
- 1.2k
- Forks
- 196
- Language
- HTML
- License
- MIT
- Created
- Sep 2026
- Last update
- Oct 14, 2026
- Type
- MCP Server
- Price
- Free
Topics
Questions about Second Brain Os
What is Second Brain Os?
An AI second brain that maintains itself. Full guide, starter vault, agent skills and scripts for a self-organizing knowledge base in Claude Code and Obsidian.
Who maintains Second Brain Os?
Second Brain Os is maintained by undefined-ui on GitHub (undefined-ui/second-brain-os). AgenticMart lists it from public repository data.
Is Second Brain Os safe to use?
AgenticMart scanned Second Brain Os on Nov 5, 2026 with automated checks for hidden code, known-malicious packages, leaked secrets and vulnerable dependencies. The result covers one commit under our scan policy, so review what access you give it and check any advisories shown here.
What license does Second Brain Os use?
It is published under the MIT license.
Second Brain Os alternatives
View more →Similar mcp servers in Learning Resources, ranked by GitHub stars. Compare licence, recent activity and scan status before you choose.
| Name | Stars | Licence | Last updated | Scan |
|---|---|---|---|---|
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