Open Memory Protocol: One Memory Store for Claude, ChatGPT, Cursor

Open Memory Protocol (OMP) is a vendor-neutral specification and reference server that solves the AI memory silo problem: every tool (Claude, ChatGPT, Cursor, Copilot) forgets you when you switch. OMP provides a unified storage and retrieval API for user memory across tools.

Quick Start

Option A — Hosted server (zero setup): Point tools at https://omp-server-production.up.railway.app. Check health with:

curl https://omp-server-production.up.railway.app/v1/health
# {"status":"ok","version":"0.1","compliance":"OMP-Core","memories_count":0}

Option B — Self-hosted: Requires Node.js 22+. Run:

npx omp-server

Or with Docker:

docker run -p 3456:3456 -v omp-data:/data ghcr.io/smjai/omp-server

Test locally:

curl http://localhost:3456/v1/health
# {"status":"ok","version":"0.1","compliance":"OMP-Core","memories_count":0}

Connect Claude via MCP

Add to your Claude Desktop config file (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "omp": {
      "command": "npx",
      "args": ["omp-mcp"],
      "env": {
        "OMP_SERVER": "http://localhost:3456",
        "OMP_API_KEY": "your-omp-key"
      }
    }
  }
}

To enable AI-powered memory extraction/compression, set server env vars: OMP_AI_PROVIDER=anthropic (or openai) and OMP_AI_API_KEY.

Add a system prompt to Claude Project to auto-use memory: "At the start of every conversation, use omp_recall to search for relevant memories. Whenever the user shares anything worth remembering, use omp_remember to save it silently."

Adapters for ChatGPT and Cursor

The OMP Bridge browser extension silently saves ChatGPT conversations to your OMP server every 2 minutes. When you open Claude, a toast notification appears: "C…" (indicates cross-app memory recall).

The spec includes SDKs for TypeScript and Python, plus a publicly hosted Mobile PWA at https://omp-server-production.up.railway.app/app.

Who It's For

Developers juggling multiple AI tools (Claude, ChatGPT, Cursor, Copilot) who want persistent memory across sessions without manual context transfer.