w3c-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| W3C_MCP_PERF | No | Enable performance logging only. | |
| W3C_MCP_DEBUG | No | Enable debug logging. Debug output includes tool call arguments, execution timing, and data loading performance. |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| list_w3c_specsA | List W3C/WHATWG/IETF web specifications with optional filtering by organization, keyword, or category |
| get_w3c_specB | Get detailed information about a specific web specification including URLs, status, repository, and test info |
| search_w3c_specsA | Search web specifications by query string, searching in title, shortname, and description |
| get_webidlC | Get WebIDL interface definitions for a specification. WebIDL defines the JavaScript APIs. |
| list_webidl_specsB | List all specifications that have WebIDL definitions available |
| get_css_propertiesB | Get CSS property definitions from a specific spec or all specs |
| list_css_specsB | List all CSS specifications that have property definitions available |
| get_html_elementsC | Get HTML element definitions from a specific spec or all specs |
| list_element_specsB | List all specifications that have HTML element definitions available |
| get_pwa_specsC | Get all Progressive Web App (PWA) related specifications including Service Worker, Web App Manifest, Push API, Background Sync, etc. |
| get_spec_dependenciesA | Get basic information for a specification. Note: Dependency data (dependencies/dependents) is not yet available from the upstream data source and currently returns empty arrays. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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