Graphiti MCP Server is the most under-acknowledged connector in the catalog

Betweenness centrality measures how often a node sits on the shortest path between two other nodes. A node with high betweenness but low inbound-degree is, by definition, an under-acknowledged-but-load-bearing connector — nobody points at it, but the graph routes through it. The catalog's top such node is Graphiti MCP Server: 0 inbound edges, 0.71 normalised betweenness — the highest non-trivial value in the entire graph.

Why it matters structurally: Graphiti MCP Server sits on the shortest path between the MCP-spec substrate cluster (Claude Desktop, Cursor, Windsurf, the MCP spec itself) and the Zep / Graphiti citation-anchor pair (Zep is the most-cited entry in the dedicated-memory-layer category; Graphiti is its open-source graph backend). If you removed Graphiti MCP Server from the graph, the MCP-tooling cluster and the dedicated-memory-graph cluster would disconnect from each other.

The top-five bridge-surprise list is Graphiti MCP Server, MAGMA, Memformers, MemEvolve, RGMem. These are systems with high structural importance but very low explicit citation — the catalog finds them because the typed-edge graph surfaces structural roles that citation hubs miss.