Personal Brain MCP v0.2

A PostgreSQL-backed long-term personal-memory MCP server. It supports local Docker PostgreSQL and remote Neon PostgreSQL, and exposes a Streamable HTTP MCP endpoint for hosting on Render.

MCP tools

• get_personal_context

• save_memory

• query_personal_database — model-generated read-only SQL only

• update_context_manifest

Related MCP server: hippocampus-mcp

Remote endpoints

• MCP: POST /mcp (Streamable HTTP)

• Health check: GET /health

Local development with Docker PostgreSQL

cp .env.example .env
# Remove/comment DATABASE_URL in .env to use the local Docker settings.
docker compose up -d
npm install
npm run check
npm run dev

The server listens on http://localhost:10000 by default.

Neon / Render

Set these environment variables in Render:

DATABASE_URL=<Neon connection string>
MCP_API_KEY=<long random secret, recommended>
USER_ID=main
USER_NAME=<your display name>
USER_LANGUAGE=ko
USER_TIMEZONE=Asia/Seoul

Render supplies PORT automatically. The app binds to 0.0.0.0:$PORT.

Build command:

npm install && npm run build

Start command:

npm start

Health check path:

/health

After deployment, the MCP endpoint is:

https://<your-render-service>.onrender.com/mcp

If MCP_API_KEY is set, clients must send:

Authorization: Bearer <MCP_API_KEY>

Database initialization

On startup, the app safely creates the required tables and indexes if they do not already exist. pgvector is optional in v0.2; failure to enable it does not prevent startup.

Security

• .env is ignored by Git.

• Never commit Neon connection strings, passwords, API keys, or tokens.

• query_personal_database accepts only one SELECT/WITH query, runs it in a read-only transaction, and caps output at 100 rows.