Open Brain
Give your coding agent durable graph-structured memory with deduplication, themes, and synthesis backed by your Supabase-hosted Open Brain deployment.
Overview
Open Brain is an MCP server for the Build phase that provides graph-structured long-term memory for AI agents via a Supabase-hosted remote endpoint.
What is this MCP server?
- Graph-structured memory MCP with auto dedup, themes, decay, and synthesis
- Published LongMemEval figure in server description: 37.2%
- Remote streamable-http on Supabase Edge Functions per project ref
- Bearer Authorization header with required Open Brain API key
- Version 1.1.0 from open-brain-server on GitHub
- Server description cites 37.2% LongMemEval-related benchmark figure
- MCP server version 1.1.0
- Transport: streamable-http on Supabase Edge Functions
Community signal: 8 GitHub stars.
What problem does it solve?
Your agent forgets project context between sessions, so you repeat architecture decisions and lose thread on multi-week solo builds.
Who is it for?
Solo builders operating long-horizon agent workflows who can run Open Brain on Supabase and want MCP-native memory tools.
Skip if: Teams wanting zero-setup chat memory with no Supabase project, API keys, or edge function hosting.
What do I get? / Deliverables
Agents can store and retrieve structured memory with dedup and synthesis so coding sessions compound instead of resetting.
- Cross-session agent memory with thematic organization and synthesis
- MCP tools for storing and querying project knowledge as a graph
- Reduced re-explanation of stack choices and customer constraints
Recommended MCP Servers
Journey fit
Persistent agent memory is foundational tooling while you build and extend agent workflows, not a one-off launch tactic. Agent-tooling is the shelf for MCP servers that extend recall, context, and long-horizon behavior of coding agents across sessions.
How it compares
Graph memory MCP on Supabase, not a local markdown notes skill or generic vector DB tutorial.
Common Questions / FAQ
Who is Open Brain for?
It is for indie developers and agent builders who need durable, structured recall across Claude Code or Cursor sessions and are willing to host via Supabase.
When should I use Open Brain?
Use it while building agent-heavy products or internal tooling when context loss between sessions is slowing implementation and reviews.
How do I add Open Brain to my agent?
Configure the streamable-http remote https://{supabase_project_ref}.supabase.co/functions/v1/open-brain-mcp/mcp with Bearer {api_key} and your Supabase project ref variables.