Polyxd MCP server

Polyxd

An open spec, renderer and verifier for interfaces generated on demand — rendered natively in your design system, operable by people and agents alike, and checked before anyone sees them.

A request comes in. Something — a model, a backend, a rules engine, a person — writes a UI document: a small JSON file of semantic components ("a choice", "a confirmation", "a table") bound to data your app provides. A renderer turns it into your design system's components. A verifier checks it for accessibility, safety and whether an agent can operate it. Then it's used, and thrown away.

request ──► generator (any model or program that emits spec-valid JSON)
                      │  UI document: meaning only — no pixels, colours or fonts
                      ▼
              renderer (@polyxd/react, themed by a design-system pack)
                      │
                      ▼
              verifier → score, findings, agent task results

Site and docs: polyxd.com · Live gallery: polyxd.com/gallery

What works today

All 24 examples score 100 across 1,248 renders (13 packs × 2 widths × light and dark), 936 of 936 agent tasks complete by name alone, and the verifier catches 20 of 20 deliberately injected defects.

There is no bundled model. Any generator that emits spec-valid JSON drives Polyxd. See Bring your generator.

The design systems

Shortened. The full README is on GitHub.