io.github.yBookoff/thebrain MCP Server

io.github.yBookoff/thebrain

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What is the io.github.yBookoff/thebrain MCP server?

MCP server for TheBrain 15: search by meaning, graph traversal and batch writes over the local API

How to install io.github.yBookoff/thebrain

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

THEBRAIN_API_KEY
required
secret
Local API key from TheBrain: Settings > User > Local API Key
THEBRAIN_BASE_URL
Address of the local API. Default http://localhost:8001
THEBRAIN_DATA_DIR
Where semantic indexes are stored. Default ~/.thebrain-mcp
THEBRAIN_ALLOW_DESTRUCTIVE
Set to 1 to allow deleting thoughts. Deletion still requires human confirmation. Default 0
THEBRAIN_EMBEDDING_MODEL
Embedding model for semantic search. Default Xenova/multilingual-e5-small
THEBRAIN_EMBEDDING_DTYPE
Weight precision: fp32, fp16, q8 or q4. Default q8
THEBRAIN_TIMEOUT_MS
API request timeout in milliseconds. Default 30000

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "thebrain": {
      "command": "npx",
      "args": [
        "-y",
        "thebrain-mcp-server"
      ],
      "env": {
        "THEBRAIN_API_KEY": "<YOUR_THEBRAIN_API_KEY>",
        "THEBRAIN_BASE_URL": "<YOUR_THEBRAIN_BASE_URL>",
        "THEBRAIN_DATA_DIR": "<YOUR_THEBRAIN_DATA_DIR>",
        "THEBRAIN_ALLOW_DESTRUCTIVE": "<YOUR_THEBRAIN_ALLOW_DESTRUCTIVE>",
        "THEBRAIN_EMBEDDING_MODEL": "<YOUR_THEBRAIN_EMBEDDING_MODEL>",
        "THEBRAIN_EMBEDDING_DTYPE": "<YOUR_THEBRAIN_EMBEDDING_DTYPE>",
        "THEBRAIN_TIMEOUT_MS": "<YOUR_THEBRAIN_TIMEOUT_MS>"
      }
    }
  }
}

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