Visual Explainers for Complex Topics MCP server

• Registry nameio.vectree/diagramsverified in the MCP registry

The registry name sits under vectree.io. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-26
• Tools6
• Server calls itselfvectree
• Server version1.0.0
• Protocol version2025-03-26

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 224 ms.

• Whether its tools do the product's job has not been judged yet.
• Checked on 2 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
• Answeredmeasuring2 of the 7 daily checks it takes to print a share
• Median first answer513 ms
• Space in an agent's context≈ 1,627 tokensthe definitions of all its tools (6), which an agent carries on every turn
• Tool definitionsB · 83 of 100
• Typed results0 of 6 toolsdeclared outputSchema: results come typed, read once

• Not saying whether it only reads or can destroy: 6 of 6

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• get_collection

  Fetch one Vectree collection: its description and the diagrams it contains, in curated order. A collection is an editor-assembled group of Vectree's labelled schematics around one theme — a book shelf, a system map, a skill tree or a set…

• get_diagram

  Fetch the full content of one Vectree diagram: every labelled node with its explanation, a step-by-step walkthrough when the diagram is animated, plus image URLs and links to the diagrams its nodes lead to. Vectree explains how things…

• get_learning_path

  Fetch one Vectree learning path: its ordered steps, each naming the diagram that step teaches. A learning path is a curated sequence of Vectree's labelled schematics that works through a subject from the fundamentals upward. This tool…

• list_collections

  List Vectree's curated collections — hand-assembled groups of diagrams: book shelves, system maps, skill trees and deep lore. Vectree explains how things work as zoomable, labelled schematics. A collection is an editor-curated set of them…

• search_diagrams

  Search Vectree's library of ~95,000 interactive concept diagrams by meaning, not keywords. Vectree explains how things work as zoomable, labelled schematics — each diagram breaks a topic into nodes you can read or drill into. Use this…

• search_learning_paths

  Search Vectree's curated learning paths — ordered sequences of diagrams that teach a subject from the ground up, one step at a time. Vectree explains how things work as zoomable, labelled schematics. A learning path strings a set of those…