# Use Astronomer: The Best Place to Run Apache Airflow® with your agent.

[Astronomer: The Best Place to Run Apache Airflow®](https://astronomer.io/) (`astronomer.io`) registers 9 WebMCP tools. 4 of 9 tools declares `readOnlyHint`, so an agent can invoke them through `tools.call`. The registry runs the tool in a fresh headless page on astronomer.io and returns untrusted site content.

This page mirrors the [WebMCP Registry](https://wmcp.ai/sites/astronomer.io) listing for `astronomer.io`, last live-checked by the registry at 2026-09-21T20:58:09.303Z. Run `ghostget webmcp sites.get --input '{"domain":"astronomer.io"}' --json` for the current schema; the listing can drift between checks.

## Use Astronomer: The Best Place to Run Apache Airflow® 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":"astronomer.io"}' --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":"astronomer.io","tool":"get_site_overview","input":"{}"}' --json
```

## Registered WebMCP tools

Astronomer: The Best Place to Run Apache Airflow® publishes 9 tools on astronomer.io; 4 declare `readOnlyHint`.

| Tool | What it does | Callable through Ghostget |
| --- | --- | --- |
| `book_demo` | Navigate to the Astronomer demo booking page. | Listed for discovery; the registry allows read-only calls only |
| `get_discovery_endpoints` | Return machine-readable discovery endpoints published by www.astronomer.io. | Listed for discovery; the registry allows read-only calls only |
| `get_site_overview` | Get an outline of the Astronomer documentation, grouped by section, with a short description of each page. May be truncated for large sites; use search_docs to find pages not listed. | Callable read-only tool |
| `navigate_page` | Navigate the current browser tab to a Astronomer documentation page. | Listed for discovery; the registry allows read-only calls only |
| `open_docs` | Navigate to Astronomer documentation. | Listed for discovery; the registry allows read-only calls only |
| `open_site_path` | Navigate to a path on www.astronomer.io while staying on the same origin. | Listed for discovery; the registry allows read-only calls only |
| `read_page` | Read the full content of a Astronomer documentation page as markdown. | Callable read-only tool |
| `read_skill` | Read a Astronomer agent skill document by name. | Callable read-only tool |
| `search_docs` | Search the Astronomer documentation for relevant pages and content. | 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 Astronomer: The Best Place to Run Apache Airflow® changes its tools.
- **No account needed.** These calls are credential-free registry reads. For tools that need a session on astronomer.io, browse the site itself or check back when the registry lists more tools.