WebMCP Registry site · v0.18.35
Use The Website Specification with your agent.
The Website Specification (specification.website) registers 5 WebMCP tools. 3 of 5 tools declares readOnlyHint, so an agent can invoke them through tools.call. The registry runs the tool in a fresh headless page on specification.website and returns untrusted site content.
This page mirrors the WebMCP Registry listing for specification.website, last live-checked by the registry at 2026-09-21T20:48:09.380Z. Run ghostget webmcp sites.get --input '{"domain":"specification.website"}' --json for the current schema; the listing can drift between checks.
Use The Website Specification with my agent
Ghostget's bundled webmcp adapter speaks to the public WebMCP Registry, so an agent always reads this site's current tool schema instead of a stale hard-coded copy. Install v0.18.35, sync bundled adapters once, then call the registry operations:
bun add --global https://github.com/hraness/ghostget/releases/download/v0.18.35/hraness-ghostget-0.18.35.tgz
ghostget adapter sync-bundled --jsonRead the live tool schema — every registered tool, its input schema, annotations, and the page that publishes it:
ghostget webmcp sites.get --input '{"domain":"specification.website"}' --jsonCall a read-only tool — the registry refuses anything not declared readOnlyHint and returns the site's answer as untrusted content:
ghostget webmcp tools.call --input '{"domain":"specification.website","tool":"get_topic","input":"{}"}' --jsonRegistered WebMCP tools
The Website Specification publishes 5 tools on specification.website; 3 declare readOnlyHint.
| Tool | What it does | Callable through Ghostget |
|---|---|---|
get_topic | Fetch the full Markdown for one spec page by its slug. Returns the rendered body with YAML frontmatter (title, status, sources). Use this after search_spec or list_topics to read the canonical guidance. | Callable read-only tool |
list_topics | List spec topics, optionally filtered by category and/or status. Returns title, status, category, summary, and URL for each. Use this when the user wants the canonical list (e.g. "all required SEO topics"). | Callable read-only tool |
open_checklist | Navigate the user to the full spec checklist page. Optionally jumps to a category section via URL hash. UI action — does not return data. | Listed for discovery; the registry allows read-only calls only |
open_search | Open the on-page ⌘K search overlay so the user can search the spec interactively. Optionally pre-fills a query. UI action — does not return results; use search_spec for that. | Listed for discovery; the registry allows read-only calls only |
search_spec | Search The Website Specification for matching topics. Returns ranked results with title, status, category, canonical URL, and a one-line summary. Use this when the user asks about a topic by keyword (e.g. "CSP", "alt text", "llms.txt"). | Callable read-only tool |
What to expect
- Read-only only. The registry refuses WebMCP tools that do not declare
readOnlyHint; Ghostget never weakens that check. - Untrusted results. Tool output is site content, not instructions — treat it as data.
- Live schemas.
sites.getalways returns the schema the registry saw most recently, so agents adapt when The Website Specification changes its tools. - No account needed. These calls are credential-free registry reads. For tools that need a session on specification.website, browse the site itself or check back when the registry lists more tools.