# Use Hypothek Spanien ab 2,75 %, Portugal ab 3,65 % Festzins with your agent.

[Hypothek Spanien ab 2,75 %, Portugal ab 3,65 % Festzins](https://perini.es/) (`perini.es`) registers 3 WebMCP tools. 1 of 3 tools declares `readOnlyHint`, so an agent can invoke it through `tools.call`. The registry runs the tool in a fresh headless page on perini.es and returns untrusted site content.

This page mirrors the [WebMCP Registry](https://wmcp.ai/sites/perini.es) listing for `perini.es`, last live-checked by the registry at 2026-09-23T02:51:23.729Z. Run `ghostget webmcp sites.get --input '{"domain":"perini.es"}' --json` for the current schema; the listing can drift between checks.

## Use Hypothek Spanien ab 2,75 %, Portugal ab 3,65 % Festzins 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":"perini.es"}' --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":"perini.es","tool":"es_hypothek_spanien_portugal_berechnen","input":"{}"}' --json
```

## Registered WebMCP tools

Hypothek Spanien ab 2,75 %, Portugal ab 3,65 % Festzins publishes 3 tools on perini.es; 1 declare `readOnlyHint`.

| Tool | What it does | Callable through Ghostget |
| --- | --- | --- |
| `es_hypothek_spanien_portugal_berechnen` | Berechnet fuer eine Immobilienfinanzierung in Spanien oder Portugal (Nicht-Residenten) die Monatsrate, den Darlehensbetrag und die Beleihung (max. 70 % ES / 80 % PT), die Kaufnebenkosten (ca. 11 % ES / 10 % PT), die Gesamtinvestition, den E | Callable read-only tool |
| `es_rechenergebnis_mailen` | SCHREIBEND, mit Seiteneffekt: Sendet die vollstaendige Auswertung eines Rechners per E-Mail an die angegebene Adresse; der Server rechnet die uebergebenen Eingaben nach. Zugleich geht eine Lead-Benachrichtigung an Perini. Erfordert Rechner- | Listed for discovery; the registry allows read-only calls only |
| `es_unterlagen_anfordern` | SCHREIBEND, mit Seiteneffekt: Fordert die Kauf-Checkliste fuer Spanien bzw. Portugal an und VERSENDET sie per E-Mail (Download-Links) an die angegebene Adresse; zugleich geht eine Lead-Benachrichtigung an Perini. Erfordert Name, gueltige E- | Listed for discovery; the registry allows read-only calls only |

## 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 Hypothek Spanien ab 2,75 %, Portugal ab 3,65 % Festzins changes its tools.
- **No account needed.** These calls are credential-free registry reads. For tools that need a session on perini.es, browse the site itself or check back when the registry lists more tools.