"An overview of temporal knowledge graphs" matching MCP connectors:

FastMCP server for TheBrain API — AI access to a personal knowledge graph, Tollbooth-monetized

Serve a folder of Markdown notes as an MCP server: hybrid search, reading, and sourced answers.

Search, save, and set reminders in your personal MarkIt library of links, posts, and notes.

Penlog is an Apple Pencil journaling app for iPad that reads each handwritten page into structured tasks, notes, and priorities. Its MCP server exposes that journal to your AI: search pages by topic, pull open tasks with reconciled status, read a full day's page, and create or update tasks that appear on your handwritten page and sync to Notion. Write by hand. Work with everything.

Search and save to your Purl read-it-later knowledge base from any MCP client.

Private memory layer — one library your notes, docs, and chat history live in, that any AI tool (Claude, Cursor, ChatGPT) connects to over MCP instead of re-pasting context. Semantic search over your own documents with citations; every memory is a document you can read, edit, and delete. ~80% fewer context tokens than pasting your library. Connect via OAuth (sign in when prompted) — get started at

Host an agent's pages at clean, permanent URLs. Publish, organize, edit, search and re-find docs.

Connect Memlane, your personal library of saved links and notes

Noogat is a voice-first note-taking app for iOS and web with an MCP server for AI coding agents. Capture ideas hands-free via Siri, retrieve them inside Claude Code, Claude Desktop, or Cursor. Features: semantic search, AI auto-tagging, search by time, related notes. Pro subscription required for MCP access.

Remote knowledge base built for teams. Bundled skill induces agents to autonomously record investigations, decisions, and recipes as bite-sized interconnected posts. Forum-style web UI for humans to browse the same graph. Compounds into a dense map of a team's tribal knowledge over time.

Personal knowledge base MCP server with semantic search, auto-categorization, metadata extraction

An MCP server that used to create notes

Obris gives AI assistants access to your personal knowledge base. Use the tools to list topics and retrieve saved knowledge.

Guru MCP Server - Connect AI tools to your Guru knowledge base