# Knowledge and memory MCP servers online

Check the source documentation for each connection.

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

## MCP servers

1. [Codebase Memory](https://mcpdirectory.fyi/de/global/online/codebase-memory.md), Developer tools, Online: Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.
2. [hmem — Humanlike Memory for AI Agents](https://mcpdirectory.fyi/de/global/online/hmem-humanlike-memory-for-ai-agents.md), Knowledge and memory, Online: Persistent 5-level hierarchical memory for AI agents. SQLite-backed, lazy-loaded.
3. [MediaWiki MCP Server](https://mcpdirectory.fyi/de/global/online/mediawiki-mcp-server.md), Knowledge and memory, Online: MCP server enabling AI clients to interact with any MediaWiki wiki through standard tools
4. [Palace](https://mcpdirectory.fyi/de/global/online/palace.md), Knowledge and memory, Online: Local-first memory for coding agents — MCP server, single SQLite file, local embeddings
5. [Sequential Thinking Working Notes](https://mcpdirectory.fyi/de/global/online/sequential-thinking-working-notes.md), Knowledge and memory, Online: Local working notes, decisions, evidence and resumable sessions with SQLite persistence.
6. [ThoughtDAG](https://mcpdirectory.fyi/de/global/online/thoughtdag.md), Knowledge and memory, Online: Search local AI conversations by file or phrase and recall source turns. Four read-only tools.
7. [ZenBrain Memory](https://mcpdirectory.fyi/de/global/online/zenbrain-memory.md), Knowledge and memory, Online: Agent memory: working, episodic, semantic, procedural and core layers. Local SQLite, no account.
8. [Lumen](https://mcpdirectory.fyi/de/global/online/lumen.md), Knowledge and memory, Online: Self-hostable agentic-AI LMS: catalog, RAG tutor, FSRS reviews, AI authoring, ingest.
9. [Synaplan](https://mcpdirectory.fyi/de/global/online/synaplan.md), Knowledge and memory, Online: Self-hosted AI workspace: semantic RAG document search, long-term memory, and AI chat via MCP.
10. [Tedix](https://mcpdirectory.fyi/de/global/online/tedix.md), Productivity and collaboration, Online: Connect AI assistants to your Tedix organization’s tasks, knowledge, apps, and results through MCP.
11. [Memento](https://mcpdirectory.fyi/de/global/online/memento.md), Knowledge and memory, Online: Local-first, LLM-agnostic memory layer for AI assistants.
12. [Hexis](https://mcpdirectory.fyi/de/global/online/hexis.md), Developer tools, Online: Git-backed platform for skills, tools, and context for AI agents

## Other categories in Online

- [Developer tools](https://mcpdirectory.fyi/de/global/online/category/developer-tools.md): 26 MCP servers
- [Productivity and collaboration](https://mcpdirectory.fyi/de/global/online/category/productivity-collaboration.md): 14 MCP servers
- [Data and databases](https://mcpdirectory.fyi/de/global/online/category/data-databases.md): 10 MCP servers
- [Web and browser automation](https://mcpdirectory.fyi/de/global/online/category/web-browser-automation.md): 8 MCP servers
- [Sales and marketing](https://mcpdirectory.fyi/de/global/online/category/sales-marketing.md): 6 MCP servers
- [Search and research](https://mcpdirectory.fyi/de/global/online/category/search-research.md): 6 MCP servers
- [AI and media generation](https://mcpdirectory.fyi/de/global/online/category/ai-media-generation.md): 3 MCP servers
- [Communication](https://mcpdirectory.fyi/de/global/online/category/communication.md): 3 MCP servers
- [Cloud and DevOps](https://mcpdirectory.fyi/de/global/online/category/cloud-devops.md): 2 MCP servers
- [Ecommerce](https://mcpdirectory.fyi/de/global/online/category/ecommerce.md): 2 MCP servers
- [Finance and crypto](https://mcpdirectory.fyi/de/global/online/category/finance-crypto.md): 2 MCP servers
- [Health and science](https://mcpdirectory.fyi/de/global/online/category/health-science.md): 2 MCP servers
- [Security](https://mcpdirectory.fyi/de/global/online/category/security.md): 2 MCP servers
- [Other tools](https://mcpdirectory.fyi/de/global/online/category/other-tools.md): 1 MCP server