Persistent memory for AI agents. Free, no LLM, no SDK. Open Worker you can self-host in 2 commands.
Streamable HTTP
https://recall.notdown-app.workers.dev/mcp/%7Bkey%7Dclaude mcp add --transport http memory https://recall.notdown-app.workers.dev/mcp/%7Bkey%7DThis server publishes no installable package.