Second Brain runs on your own machine — the client starts it, so there is no endpoint to ping. 1 261 installs a week from npm. Last commit 3 Nov 2026.
Shared Graph-RAG memory for AI agents: markdown vault, wikilink recall, tasks, messaging.
What the code does
We read the source, 2 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
const child = spawn(process.execPath, ['api/server.js'], {
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add second-brain -- npx -y mind-mri-second-brain{
"mcpServers": {
"second-brain": {
"command": "npx",
"args": [
"-y",
"mind-mri-second-brain"
]
}
}
}[mcp_servers.second-brain]
command = "npx"
args = ["-y", "mind-mri-second-brain"]{
"mcpServers": {
"second-brain": {
"command": "npx",
"args": [
"-y",
"mind-mri-second-brain"
]
}
}
}{
"servers": {
"second-brain": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"mind-mri-second-brain"
]
}
}
}Optional settings from the registry entry, left out of the block above:
BRAIN_VAULT (Folder holding the markdown vault. Defaults to ~/.second-brain/vault when installed from npm), BRAIN_PORT (Port of the local API server the MCP server starts and talks to (default 3747)), BRAIN_KEY (Optional API key; when set the local API requires it as a Bearer token).
Alternatives to Second Brain
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Second Brain — questions
Answers built from our own checks of this server.