OB1
Open Brain — The infrastructure layer for your thinking. One database, one AI gateway, one chat channel — any AI plugs in. No middleware, no SaaS.
OB1 (Open Brain) is an MCP server that provides a unified memory infrastructure layer for AI assistants, connecting them to a single Supabase database with vector search capabilities. It allows Claude Desktop, ChatGPT, Cursor, Claude Code, and other AI tools to share persistent memory and context without middleware or SaaS dependencies. The system includes a database backend, AI gateway, capture channels (Slack/Discord), and extensible schemas for household knowledge, calendars, CRM, meal planning, and job tracking. The MCP server enables remote connections so any compatible client can read and write to your personal knowledge graph.
Key Features
Use Cases
- 01Creating a shared memory layer across multiple AI assistants so Claude, ChatGPT, and Cursor all reference the same knowledge base
- 02Building a personal CRM that tracks professional contacts and integrates with captured thoughts and calendar events
- 03Importing years of ChatGPT conversations, Obsidian notes, and email archives into a searchable vector database
- 04Setting up a family calendar and meal planner that AI assistants can read and update across sessions
- 05Tracking home maintenance schedules and household knowledge that any AI tool can recall instantly
- 06Running self-improving agent workflows with provenance tracking and recall audit trails for compliance or debugging
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OB1 — FAQ
What is the OB1 MCP server?+
OB1 (Open Brain) is an MCP server that connects AI assistants like Claude Desktop, ChatGPT, and Cursor to a single Supabase database with vector search. It enables persistent, shared memory across all your AI tools without middleware or SaaS chains.
How do I install and connect the OB1 MCP server to Claude Desktop?+
Follow the setup guide in the repository to deploy the Supabase database, edge functions, and MCP server. Then configure Claude Desktop's MCP settings JSON to point to the deployed server URL with your authentication credentials. The full setup takes about 45 minutes and requires no coding experience.
Which AI clients work with the OB1 MCP server?+
OB1 supports Claude Desktop, ChatGPT (via MCP), Cursor, Claude Code, and any other MCP-compatible client. The remote MCP connection primitive enables connections from multiple clients simultaneously.
Do I need API keys or a Supabase account to use OB1?+
Yes, you need a Supabase account (free tier works) to host the PostgreSQL database with pgvector. You'll also need API keys for your chosen AI gateway (OpenRouter, OpenAI, Anthropic, etc.) to power embeddings and LLM routing.
Is the OB1 MCP server free and open source?+
Yes, OB1 is open source under the FSL-1.1-MIT license. The software is free, but you'll pay for Supabase hosting (free tier available) and AI API usage through your chosen provider.
Can I self-host OB1 without Supabase?+
Yes, a community-contributed Kubernetes deployment recipe allows fully self-hosted operation with PostgreSQL and pgvector, eliminating the Supabase dependency.
How do I install OB1?+
Open the source repository on GitHub and follow its README. OB1 is a mcp server — MCP Agents Market links you directly to the official repo.
Is OB1 free?+
OB1 is an open-source project hosted on GitHub. Check the repository for its license and any usage requirements.