"Information about Neo4j graph database" matching MCP connectors:

Diffbot MCP — Knowledge Graph company enrichment + web content extraction (diffbot.com)

A personal RAG database you build from chat, so AI creates work that sounds like you.

Persistent cloud memory for Ai coding assistants. 33 MCP tools, 85% accuracy on LoCoMo benchmark. Semantic search, auto-skills, knowledge graph, quantum-safe encryption. Works with Claude Code, Cursor, Windsurf, and any MCP client.

Remote ChromaDB vector database MCP server with streamable HTTP transport

A collaborative substrate over your data: vector, knowledge graph, SQL, geospatial, streaming.

Persistent memory for AI agents. Semantic search, memory graph, W3C DID identity.

Ground GTM agents in governed, cited company truth.

MCP memory server with shared team workspaces, typed knowledge chunks (decision, finding, convention, state, question, reference), role-based access, and cross-tool support for Claude, Cursor, and Codex. The only MCP memory server built for engineering teams. Features automatic deduplication, two-layer retrieval (LLM KB selection + hybrid vector/BM25/RRF fusion), a web dashboard with knowledge graph visualization, and attribution tracking. Zero server-side LLM costs.

ContextBook is an open-source MCP server that gives AI tools a persistent, searchable context library. Store information as Books and Pages, retrieve exactly what's needed via natural-language semantic search - injected on demand, not pre-loaded. Works with Cursor, Claude, Windsurf, and any MCP-compatible client. Self-hostable, MIT licensed.

AI memory with 56 tools. Knowledge Graph, semantic search, OAuth 2.1 + Magic Link. Free tier.

Causal graph memory engine for AI agents. Scores memories using relevance × connectivity × reactivation, connects them in a causal graph, and actively forgets irrelevant ones. 11 MCP tools including store, recall, search, traverse, and explain.

Persistent memory and knowledge graph for AI assistants — keyword + vector + graph search.

Knowledge graph ingestion, entity search, ontology analysis, and CoPass scoring.

Knowledge graph ingestion, entity search, ontology analysis, and CoSync scoring.

Provides metadata information to AI agents through the search API.

Knowledge graph for AI agents. Query concepts, walk edges, get advisories.

The Needle MCP server enables semantic search on documents stored in files like PDFs, DOCX, and XLSX by connecting AI applications to external data sources. It provides capabilities to create and manage document collections, perform natural language searches on stored content, and retrieve relevant information without requiring exact keyword matches.