# Use Vellum with your agent.

[Vellum](https://vellum.ai/) (`vellum.ai`) registers 2 WebMCP tools. 1 of 2 tools declares `readOnlyHint`, so an agent can invoke it through `tools.call`. The registry runs the tool in a fresh headless page on vellum.ai and returns untrusted site content.

This page mirrors the [WebMCP Registry](https://wmcp.ai/sites/vellum.ai) listing for `vellum.ai`, last live-checked by the registry at 2026-09-23T04:03:11.911Z. Run `ghostget webmcp sites.get --input '{"domain":"vellum.ai"}' --json` for the current schema; the listing can drift between checks.

## Use Vellum 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 --json
```

**Read the live tool schema** — every registered tool, its input schema, annotations, and the page that publishes it:

```
ghostget webmcp sites.get --input '{"domain":"vellum.ai"}' --json
```

**Call 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":"vellum.ai","tool":"search_vellum_docs","input":"{}"}' --json
```

## Registered WebMCP tools

Vellum publishes 2 tools on vellum.ai; 1 declare `readOnlyHint`.

| Tool | What it does | Callable through Ghostget |
| --- | --- | --- |
| `navigate_vellum_site` | Navigate this browser tab to Vellum's documentation, downloads, pricing, or signup page. This does not create an account, purchase anything, or start a download. | Listed for discovery; the registry allows read-only calls only |
| `search_vellum_docs` | Search Vellum's public product documentation. Returns matching page titles, headings, URLs, and excerpts without changing browser state. | 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.get` always returns the schema the registry saw most recently, so agents adapt when Vellum changes its tools.
- **No account needed.** These calls are credential-free registry reads. For tools that need a session on vellum.ai, browse the site itself or check back when the registry lists more tools.