#knowledge-graph

Katra Agentic Memory

Katra — Cognitive Memory as a Service for AI Agents. Open-source cognitive memory infrastructure with MCP protocol support.

MCP Memory Sqlite

A personal knowledge graph and memory system for AI assistants using SQLite with optimized text search. Perfect for giving Claude (or any MC...

MCP Memory Libsql

🧠 High-performance persistent memory system for Model Context Protocol (MCP) powered by libSQL. Features vector search, semantic knowledge...

Qmdc

A Markdown-native context graph for humans and AI agents.

Lore

Cross-agent memory SDK. Agents publish lessons, query shared knowledge, with built-in redaction. Python + TypeScript.

Octobrain

The brain for your LLM

MCP Proto Okn

A Model Context Protocol (MCP) server that provides tools for querying SPARQL endpoints, with specialized support for NSF-funded Proto-OKN (...

Waggle MCP

MCP server for external memory layer for AI agents + more . Download from pypi , and get started

Zettelkasten Second Memory

An OpenClaw (2026.4/2026.6+) and Hermes Agent plugin that turns AI conversations into a permanent Zettelkasten knowledge base — atomic notes...

Vitrus

your glass-box company brain — tells you what it doesn't know (deterministic gap analysis). MIT core · MCP · PGLite→Postgres.

Cortex

Persistent ontology driven knowledge system with formal OWL-RL reasoning, SPARQL graph + SQLite, and 22 MCP tools for AI agent memory.

Neurostack

Your second brain, starting today. CLI + MCP server that helps you build, maintain, and search a knowledge vault that gets better every day....