open-components

endpoint

https://mcp.opencomponents.dev/mcp

protocol

streamable-http ·2025-06-18

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is open-components live?

Yes — it answered the hub's last check (checked 1h ago). It answered 100% of checks over the last 30 days.

Is open-components free to use?

Yes — the hub reached it with no key and no payment.

What tools does open-components have?

6 tools: get-reference-implementation, get-page, search-docs, get-contract, list-components, list-rules.

Is open-components safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• list-components open 1h ago

  Lists what the Open Components standard covers: the components that have shipped (like Button), the foundations every component follows (like Design Tokens), and the components planned on the Roadmap. WHEN TO USE: to check whether a component has a standard yet, to get the name the other tools take for it, or to see what's planned. WHEN NOT TO USE: if you already know the component, call get-contract directly. To find a topic in the docs, use search-docs. Shipped entries come with their page, their contract and how many rules they have. Planned ones have no page, contract or rules yet: hold them to the three layers and Design Tokens, following the Button's structure, as the build-component prompt does.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "properties": {
      "status": {
        "enum": [
          "shipped",
          "planned",
          "all"
        ],
        "type": "string",
        "default": "all",
        "description": "Which components to list."
      }
    }
  }

  arguments 16 lines copy
• list-rules open 1h ago

  Lists checklist rules as records, filtered by component, ID, scope, layer, level or check. Each rule has a stable ID to cite in reviews and commits, its level (must or should), its scope, its requirement, how to check it (like a unit test, a review or axe's button-name rule) and a link to it. WHEN TO USE: to review code rule by rule, to get only the rules that apply to a task, to look rules up by ID, or to find the ones a tool can check. Pass scope ["component", "both"] to build or review a component, and ["usage", "both"] to review a screen that uses it. WHEN NOT TO USE: for a component's API, DOM contract and tokens, use get-contract, which has every rule too. A component meets the standard when it meets every must rule. Each should rule is expected unless there's a good reason not to follow it.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "properties": {
      "ids": {
        "type": "array",
        "items": {
          "type": "string",
          "maxLength": 100
        },
        "maxItems": 100,
        "description": "The IDs of the rules to look up, like [\"button/keep-focus\"]."
      },
      "check": {
        "type": "array",
        "items": {
          "enum": [
            "axe",
            "unit-test",
            "type-check",
            "lint",
            "visual-regression",
            "keyboard",
            "aria-snapshot",
            "screen-reader",
            "emulation",
            "zoom",
            "contrast-checker",
            "review"
          ],
          "type": "string"
        },
        "description": "How the rule is checked."
      },
      "layer": {
        "type": "array",
        "items": {
          "enum": [
            "ui",
            "ux",
            "dx",
            "ax"
          ],
          "type": "string"
        },
        "description": "ui (how it looks), ux (user experience), dx (developer experience) or ax (agentic experience)."
      },
      "level": {
        "type": "array",
        "items": {
          "enum": [
            "must",
            "should"
          ],
          "type": "string"
        }
      },
      "scope": {
        "type": "array",
        "items": {
          "enum": [
            "component",
            "usage",
            "both"
          ],
          "type": "string"
        },
        "description": "Who meets the rule: component (the component itself), usage (the code that uses it) or both. Rules without a scope, like the Design Tokens', match any scope."
      },
      "automated": {
        "type": "boolean",
        "description": "true for the rules tools check all of (unit tests, axe, a type check, a linter or a visual regression test), false for the ones a person checks, at least in part."
      },
      "component": {
        "enum": [
          "design-tokens",
          "button",
          "spinner",
          "input"
        ],
        "type": "string",
        "description": "The component or foundation, like button or design-tokens."
      }
    }
  }

  arguments 85 lines copy
• get-reference-implementation unknown never probed

  Returns a shipped component's reference implementation: a Vue 3 component that meets every rule in its checklist, the tests that prove it, the helpers it shares with other components and its theme tokens. The live examples on the site run on this code. WHEN TO USE: to build a component that meets the standard, in Vue or by porting it and its tests to another framework, or to see how a rule is met in code. WHEN NOT TO USE: for the requirements, use get-contract. For how the component is used in another framework, use get-page with that framework.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "component"
    ],
    "properties": {
      "files": {
        "type": "array",
        "items": {
          "type": "string",
          "maxLength": 100
        },
        "maxItems": 20,
        "description": "Only these files, like [\"Button.vue\"] or [\"Button.test.ts\"]. Leave it out for every file."
      },
      "component": {
        "enum": [
          "button",
          "input",
          "spinner"
        ],
        "type": "string",
        "description": "A component with a reference implementation, like button."
      }
    }
  }

  arguments 27 lines copy
• get-page unknown never probed

  Reads a docs page as markdown, whole or just the sections you name. Component pages explain why each rule exists, with examples in React, Vue, Svelte, Angular, Solid, Astro and Vanilla: pass a framework to keep only its examples. WHEN TO USE: for the reasoning, an example or the details behind a rule (like the sections ["Loading"] of the button's page), or for a page without a contract, like the introduction or the roadmap. WHEN NOT TO USE: for the requirements alone, use get-contract or list-rules, which are much shorter. To find which page or section covers a topic, use search-docs. A page longer than about 8,000 tokens, like the button's, returns its outline instead: every heading with its anchor and length, so you can ask for the sections you need. So do sections that are too long to return together.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "path"
    ],
    "properties": {
      "path": {
        "type": "string",
        "maxLength": 300,
        "description": "The page: its name (introduction, roadmap, mcp-server, agent-plugin, design-tokens, button, spinner, input), or its path, like /docs/components/button. A URL's #anchor, like the ones search-docs returns, reads that section."
      },
      "sections": {
        "type": "array",
        "items": {
          "type": "string",
          "maxLength": 200
        },
        "maxItems": 20,
        "description": "The sections to read, by heading or anchor, like [\"Loading\"] or [\"#ux-rules\"]. Each comes with its sub-sections. Name a parent to tell apart headings that repeat, as in \"Every state > Loading\"."
      },
      "framework": {
        "enum": [
          "react",
          "vue",
          "svelte",
          "angular",
          "solid",
          "astro",
          "vanilla"
        ],
        "type": "string",
        "description": "Your framework, to keep only its examples."
      }
    }
  }

  arguments 36 lines copy
• search-docs unknown never probed

  Searches the whole standard, every section of every page and every checklist rule, and returns the best matches: where each one is, a short excerpt, and for rules, their ID, level and scope. WHEN TO USE: to find where a topic is covered when you don't know the page or the section, like "focus after delete", "spinner", "aria-pressed" or "dark mode". Then read a section with get-page, or rules with list-rules. WHEN NOT TO USE: to list a component's rules, use list-rules. To see which components there are, use list-components. Search for a few specific words rather than a whole question.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "query"
    ],
    "properties": {
      "type": {
        "enum": [
          "section",
          "rule"
        ],
        "type": "string",
        "description": "Only search sections, or only rules."
      },
      "limit": {
        "type": "integer",
        "default": 8,
        "maximum": 20,
        "minimum": 1,
        "description": "How many results to return, at most."
      },
      "query": {
        "type": "string",
        "maxLength": 200,
        "minLength": 2,
        "description": "A few words, like \"focus after delete\" or \"aria-pressed\"."
      },
      "component": {
        "enum": [
          "introduction",
          "roadmap",
          "mcp-server",
          "agent-plugin",
          "design-tokens",
          "button",
          "spinner",
          "input"
        ],
        "type": "string",
        "description": "Only search this page and its rules, like button or design-tokens."
      }
    }
  }

  arguments 44 lines copy
• get-contract unknown 1h ago

  Returns the contract of a component or a foundation, as YAML: its API (props, slots and events), its DOM contract (element, role, states, keyboard and parts), its tokens, and every rule in its checklist, each with a stable ID (like button/keep-focus), a level (must or should), a scope (component, usage or both) and how to check it. It holds every requirement in a fraction of the page's length, and it's the same file as https://opencomponents.dev/raw/docs/<path>.yaml. WHEN TO USE: first, before you build, review or explain a component or its tokens. WHEN NOT TO USE: for some of the rules only (by scope, layer, level or check), use list-rules. For the reasoning or the examples behind a rule, use get-page with its sections.

  mcp-tool

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  {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "component"
    ],
    "properties": {
      "component": {
        "enum": [
          "design-tokens",
          "button",
          "spinner",
          "input"
        ],
        "type": "string",
        "description": "The component or foundation, like button or design-tokens."
      }
    }
  }

  arguments 19 lines copy

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.