# w3c-mcp

> w3c-mcp — shuji-bonji-w3c-mcp. Use this tool when you need to access official web standards data, including W3C, WHATWG, and IETF specifications, to retrieve information on WebIDL definitions, CSS properties, and HTML elements. It solves problems related to web development and standardization by providing a centralized repository of official web specifications. The tool accepts queries and returns relevant data, making it ideal for AI assistants and developers working with web technologies.

Canonical page: https://skillsregistry.net/skills/shuji-bonji-w3c-mcp  
JSON: https://api.skillsregistry.net/v1/skills/shuji-bonji-w3c-mcp

## Description

MCP Server for accessing W3C/WHATWG/IETF web specifications. Provides AI assistants with access to official web standards data including specifications, WebIDL definitions, CSS properties, and HTML elements.

## Trust

- **Trust score (0–1):** 0.97
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** container
- **Runtime environment:** vm
- **Category:** other
- **Updated:** 2026-09-28

## Source

- **Source listing:** [GitHub](https://github.com/shuji-bonji/w3c-mcp)

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "shuji-bonji-w3c-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/shuji-bonji-w3c-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/shuji-bonji-w3c-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt