# Knowledge and memory MCP servers online

Check the source documentation for each connection.

4 MCP servers. Also on the [web page](https://mcpdirectory.fyi/vn/global/online/category/knowledge-memory).

## MCP servers

1. [Better Notion Mcp](https://mcpdirectory.fyi/vn/global/online/better-notion-mcp.md), Productivity and collaboration, Online: Markdown-first Notion for AI agents -- pages, databases, blocks, and comments in one call.
2. [Mnemo](https://mcpdirectory.fyi/vn/global/online/mnemo.md), Knowledge and memory, Online: Persistent AI memory with hybrid search and embedded sync. Open, free, unlimited.
3. [Kairn](https://mcpdirectory.fyi/vn/global/online/kairn.md), Knowledge and memory, Online: Local-first knowledge engine for AI agents: memory, graph, and recall over MCP.
4. [Neural Memory](https://mcpdirectory.fyi/vn/global/online/neural-memory.md), Knowledge and memory, Online: Persistent memory for AI agents — 55 MCP tools, spreading activation recall.

## Other categories in Online

- [Developer tools](https://mcpdirectory.fyi/vn/global/online/category/developer-tools.md): 4 MCP servers
- [Communication](https://mcpdirectory.fyi/vn/global/online/category/communication.md): 2 MCP servers
- [Productivity and collaboration](https://mcpdirectory.fyi/vn/global/online/category/productivity-collaboration.md): 2 MCP servers
- [Search and research](https://mcpdirectory.fyi/vn/global/online/category/search-research.md): 1 MCP server
- [Security](https://mcpdirectory.fyi/vn/global/online/category/security.md): 1 MCP server
- [Web and browser automation](https://mcpdirectory.fyi/vn/global/online/category/web-browser-automation.md): 1 MCP server