WebMCP Registry site · v0.18.35
Use H3 with your agent.
H3 (h3.dev) registers 6 WebMCP tools. 5 of 6 tools declares readOnlyHint, so an agent can invoke them through tools.call. The registry runs the tool in a fresh headless page on h3.dev and returns untrusted site content.
This page mirrors the WebMCP Registry listing for h3.dev, last live-checked by the registry at 2026-09-23T01:42:25.557Z. Run ghostget webmcp sites.get --input '{"domain":"h3.dev"}' --json for the current schema; the listing can drift between checks.
Use H3 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":"h3.dev"}' --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":"h3.dev","tool":"get_current_page","input":"{}"}' --jsonRegistered WebMCP tools
H3 publishes 6 tools on h3.dev; 5 declare readOnlyHint.
| Tool | What it does | Callable through Ghostget |
|---|---|---|
get_current_page | Get metadata for the page the user is viewing: path, URL, title, description and heading outline. | Callable read-only tool |
get_project_info | Get project metadata and links: website, source repository, issues, releases, community, `llms.txt` bundles and versions. | Callable read-only tool |
list_pages | List pages in the documentation navigation with titles, paths, URLs and available descriptions. Use for browsing; use `search_docs` for a specific topic. | Callable read-only tool |
navigate | Open a documentation page in the user's browser, optionally at a heading. Returns the page it landed on. Use only when the user asks to navigate; use `read_page` to inspect content without moving them. | Listed for discovery; the registry allows read-only calls only |
read_page | Read a documentation page as Markdown by route path. Links in it are route paths for this tool. If `truncated`, continue with `nextOffset` as `offset`. Generated pages have no Markdown source. | Callable read-only tool |
search_docs | Search pages and sections in H3. Returns ranked matches with previews, route paths and optional heading anchors. Use `read_page` to read a result. | 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 H3 changes its tools. - No account needed. These calls are credential-free registry reads. For tools that need a session on h3.dev, browse the site itself or check back when the registry lists more tools.