Mybrain by Robertsfeir is a free MCP server tool designed to function as a personal knowledge base with semantic search capabilities. Built primarily with JavaScript, it integrates directly with Claude Desktop and Claude Code CLI, enhancing AI interactions by allowing users to capture, organize, and retrieve information. Mybrain utilizes a local PostgreSQL database with pgvector for efficient storage and Ollama for generating embeddings. Its distribution methods include a .mcpb file for Claude Desktop or installation via "claude mcp add" for the CLI, with a bundled Docker option also available for a unified setup.

What does Mybrain connect to?

Mybrain connects to Claude Desktop and Claude Code CLI, serving as an MCP server. It uses a local PostgreSQL database, enhanced with pgvector for vector embeddings, to store user data. For generating these embeddings, Mybrain relies on Ollama. The server runs as a local stdio process, ensuring compatibility with the confirmed AI clients, Claude Desktop (including CoWork mode) and Claude Code CLI. Other transport protocols, like SSE or streamable HTTP, are not explicitly supported.

Core features and tools

Mybrain implements the 8-tool atelier-brain protocol, offering a suite of capabilities for knowledge management. Key tools include agent_capture for recording information, agent_search for semantic retrieval, and atelier_relation to link concepts with typed relationships such as "supersedes" or "supports." Additional tools like atelier_browse for viewing, atelier_stats for usage metrics, atelier_trace for tracking, atelier_hydrate for ingesting telemetry, and atelier_hydrate_status for monitoring hydration processes are also available.

Who is it for?

Mybrain is intended for users of Claude Desktop and Claude Code CLI who require a personal knowledge base to augment their AI-driven workflows. It caters to individuals who need to capture, organize, and semantically search their thoughts, notes, and project telemetry directly within their AI environment. This tool empowers users to build a persistent memory for their AI interactions. Skip this if you do not use Claude Desktop or Claude Code CLI for your daily work.

How to get started

Sensitive credentials, such as the database URL and API key, are stored in the macOS Keychain or Windows Credential Manager. The MCP server for Mybrain runs locally as a stdio process.

Use cases

• Capturing thoughts, ideas, notes, and decisions as they work using agent_capture.
• Querying Claude in plain English to semantically search and retrieve previously captured information using agent_search.
• Linking two thoughts with typed relations such as "supersedes," "supports," or "contradicts" using atelier_relation.
• Ingesting JSONL telemetry from Claude Code project sessions directories using atelier_hydrate.

Mybrain by Robertsfeir offers a specialized personal knowledge base for Claude AI users, integrating semantic search and structured information capture. Its reliance on local storage via PostgreSQL and Ollama for embeddings ensures data residency and control. The tool provides essential functions for enhancing AI memory and context.