Polyxd

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Write Polyxd UI documents, check them, and show them as real screens in any design-system pack.

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https://mcp.polyxd.com/mcp

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polyxd_components

Lists the semantic components a Polyxd document can use, with a one-line summary each. Pass "name" for one component's full definition: every prop and its type, which are required, when to use it and when not to, and how it renders.

namestring

A component name, e.g. "Choice", for its full definition.

Tools (7)

polyxd_components

read-only

Argument	Type	Description
name	string	A component name, e.g. "Choice", for its full definition.

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "A component name, e.g. \"Choice\", for its full definition."
    }
  }
}

polyxd_docs

Searches the polyxd.com docs, as of this server's version: installing and using the React and Web Components renderers, the spec, the verifier and its CLI, the runtime, the generation server, design systems and packs, Design Directions, analytics events, Studio, the MCP server and the roadmap. Pass "query" for the sections that best match, "page" for one whole page, or nothing for the list of pages. Cite the URLs it returns. For writing a document, use polyxd_guide.

read-only

Argument	Type	Description
page	string	A page's slug, title or URL, e.g. "quickstart", for the whole page.
query	string	A question or topic, e.g. "run the verifier in CI" or "Web Components renderer".

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "page": {
      "type": "string",
      "description": "A page's slug, title or URL, e.g. \"quickstart\", for the whole page."
    },
    "query": {
      "type": "string",
      "description": "A question or topic, e.g. \"run the verifier in CI\" or \"Web Components renderer\"."
    }
  }
}

polyxd_guide

Returns the instructions for writing a Polyxd UI document: the document shape, the rules for generated screens, bindings, actions, every component with its props, and the patterns. Call this once before writing your first document.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {}
}

polyxd_packs

Lists the design-system packs polyxd_show can draw a screen in: published design systems (Material 3, Carbon, GOV.UK and others) and original templates. The same document looks native in each.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {}
}

polyxd_show

Validates a Polyxd UI document and shows it to the user as an interactive screen, drawn by the Polyxd renderer in the design-system pack you choose (default material3). Shows nothing if the document has errors; fix them first with polyxd_validate. When the user presses an action in the screen, you receive a chat message from the user naming the action and its context; that only tells you their choice, and nothing has been submitted or paid. Packs: material3, antd, bootstrap, carbon, chakra, fluent, govuk, mantine, polaris, primer, radix, shadcn, spectrum, brutalist, civic, editorial, finance, glass, health, mono, neon, pastel, sketch, terminal, wireframe.

read-only

Argument	Type	Description
data	object	The values the screen shows, bound by {"path": "/pointer"}. Replaces the document's own "data" when given.
mode	string	Light or dark. Leave out to follow the host's theme.
pack	string	The design-system pack to draw the screen in, by id: material3, antd, bootstrap, carbon, chakra, fluent, govuk, mantine, polaris, primer, radix, shadcn, spectrum, brutalist, civic, editorial, finance, glass, health, mono, neon, pastel, sketch, terminal, wireframe. Names like "Carbon" or "shadcn/ui" work too. Pass it whenever the user names a design system. Default material3.
document*	object	A Polyxd UI document: {specVersion, surface, root, components, data?}. polyxd_guide explains the format.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "document"
  ],
  "properties": {
    "data": {
      "type": "object",
      "description": "The values the screen shows, bound by {\"path\": \"/pointer\"}. Replaces the document's own \"data\" when given.",
      "additionalProperties": true
    },
    "mode": {
      "enum": [
        "light",
        "dark"
      ],
      "type": "string",
      "description": "Light or dark. Leave out to follow the host's theme."
    },
    "pack": {
      "type": "string",
      "description": "The design-system pack to draw the screen in, by id: material3, antd, bootstrap, carbon, chakra, fluent, govuk, mantine, polaris, primer, radix, shadcn, spectrum, brutalist, civic, editorial, finance, glass, health, mono, neon, pastel, sketch, terminal, wireframe. Names like \"Carbon\" or \"shadcn/ui\" work too. Pass it whenever the user names a design system. Default material3."
    },
    "document": {
      "type": "object",
      "description": "A Polyxd UI document: {specVersion, surface, root, components, data?}. polyxd_guide explains the format.",
      "additionalProperties": true
    }
  }
}

polyxd_validate

Checks a Polyxd UI document against the spec: the schema, ids and references, bindings against the data, actions, and the rules for generated screens. Returns every issue with its JSON Pointer, the component it is in, and a hint saying what to change. Call it after writing or changing a document, and fix every error before showing it.

read-only

Argument	Type	Description
data	object	The values the screen shows, bound by {"path": "/pointer"}. Replaces the document's own "data" when given.
document*	object	A Polyxd UI document: {specVersion, surface, root, components, data?}. polyxd_guide explains the format.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "document"
  ],
  "properties": {
    "data": {
      "type": "object",
      "description": "The values the screen shows, bound by {\"path\": \"/pointer\"}. Replaces the document's own \"data\" when given.",
      "additionalProperties": true
    },
    "document": {
      "type": "object",
      "description": "A Polyxd UI document: {specVersion, surface, root, components, data?}. polyxd_guide explains the format.",
      "additionalProperties": true
    }
  }
}

polyxd_verify

Runs the Polyxd verifier's document checks: the spec validator, the pattern the surface declares, readable and distinct labels, one primary action per view, at most six inputs per view, entity-first flows, confirmations, and, when you pass one, a Design Direction's rules and voice. Returns a compact report. Example directions by name: calm-finance, playful-personal.

read-only

Argument	Type	Description
data	object	The values the screen shows, bound by {"path": "/pointer"}. Replaces the document's own "data" when given.
document*	object	A Polyxd UI document: {specVersion, surface, root, components, data?}. polyxd_guide explains the format.
registry	object	A capability registry ({capabilities: [...]}) to check the document's actions against. Leave out when there is none.
direction	any	A Design Direction to hold the document to: the direction object, or the name of an example direction.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "document"
  ],
  "properties": {
    "data": {
      "type": "object",
      "description": "The values the screen shows, bound by {\"path\": \"/pointer\"}. Replaces the document's own \"data\" when given.",
      "additionalProperties": true
    },
    "document": {
      "type": "object",
      "description": "A Polyxd UI document: {specVersion, surface, root, components, data?}. polyxd_guide explains the format.",
      "additionalProperties": true
    },
    "registry": {
      "type": "object",
      "description": "A capability registry ({capabilities: [...]}) to check the document's actions against. Leave out when there is none.",
      "additionalProperties": true
    },
    "direction": {
      "oneOf": [
        {
          "type": "string"
        },
        {
          "type": "object",
          "additionalProperties": true
        }
      ],
      "description": "A Design Direction to hold the document to: the direction object, or the name of an example direction."
    }
  }
}