Cursor persistent memory with OpenStinger

OpenStinger is an open-source MCP memory server you can attach to Cursor (and Claude Code, OpenClaw, and any MCP client). Self-hosted. Fair LongMemEval-S 81.0%.

1. Run OpenStinger

Clone the repo, start Docker (FalkorDB + Postgres), install, configure, then start the MCP server:

git clone https://github.com/srikanthbellary/openstinger.git
cd openstinger
docker compose up -d
python -m venv .venv
# activate venv, then:
pip install -e "."
cp .env.example .env
cp config.yaml.example config.yaml
# edit .env and sessions_dir in config.yaml
python -m openstinger.mcp.server

2. Point Cursor at the MCP server

Add this to the project .cursor/mcp.json (or your global Cursor MCP config):

{
  "mcpServers": {
    "openstinger": {
      "url": "http://localhost:8766/sse"
    }
  }
}

Reload Cursor. The agent should see OpenStinger tools such as memory_query, memory_add, and memory_wake_up.

3. What you get

• Hybrid BM25 + vector episodic memory (bi-temporal graph)
• Structured vault notes (identity, preferences, constraints)
• Optional alignment / drift tools (Gradient)
• Memory that moves as two Docker volumes between machines and runtimes

Related

• GitHub repo
• LongMemEval fair 81% breakdown
• Benchmark on this site
• llms.txt for agent scrapers