# Château des Ducs de Bretagne: Agent-Direct Score B (75.4%)

Site: https://www.chateaunantes.fr
Report: https://directindex.org/r/chateaunantes.fr
Scanned: 2026-10-16 (Provisional, with the action test and the assistant citation check still to come. The hatched part of the bar isn't measured yet.)
Château des Ducs de Bretagne is mostly ready for agents.
An AI assistant can open Château des Ducs de Bretagne's website. It can't find a menu or price list, so it answers from other sites. It finds a way to book or order directly on the site.

## Direct links
- Book directly: https://reservation.chateaunantes.fr/content (on the business's own site)
- Phone: 0811464644

## What to fix first
- Languages: English, Spanish, French

- **No tickets and prices found.** (+7 points) Agents answer 'what does it cost and when?' from marketplaces instead. Add a page with tickets, times and prices as text, and link to it from the homepage. Guide: https://directindex.org/guides/menu-pdf-ai
- **Structured data is incomplete.** (+6 points) Missing: address, telephone, opening hours. Guide: https://directindex.org/guides/structured-data-restaurant
- **No llms.txt.** (no points, but worth doing) Optional for now and cheap to add. It's a short text file that describes the business for language models. Guide: https://directindex.org/guides/llms-txt-for-a-business

## Fix kit: What to paste

Structured data (JSON-LD). Paste it as one block in the page's head, or in the builder's custom code box. Change anything that's wrong.

```html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "TouristAttraction",
  "name": "Château des Ducs de Bretagne",
  "url": "https://www.chateaunantes.fr",
  "telephone": "0811464644",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "Place Marc Elder 4",
    "postalCode": "44000",
    "addressLocality": "Nantes",
    "addressCountry": "FR"
  },
  "geo": {
    "@type": "GeoCoordinates",
    "latitude": 47.216143,
    "longitude": -1.5491415
  },
  "openingHours": "08:30-19:00; Jul-Aug 08:30-20:00",
  "potentialAction": [
    {
      "@type": "ReserveAction",
      "target": {
        "@type": "EntryPoint",
        "urlTemplate": "https://reservation.chateaunantes.fr/content",
        "actionPlatform": [
          "http://schema.org/DesktopWebPlatform",
          "http://schema.org/MobileWebPlatform"
        ]
      },
      "result": {
        "@type": "Reservation",
        "name": "Reservation"
      }
    }
  ]
}
</script>
```

llms.txt. Save as /llms.txt at the root of the site.

```
# Château des Ducs de Bretagne

> tourist attraction in Place Marc Elder 4 44000 Nantes, Nantes tours, attractions and museums. Phone 0811464644.

## Book or order directly

- Book: https://reservation.chateaunantes.fr/content (on the business's own site)

## Opening hours

08:30-19:00; Jul-Aug 08:30-20:00

## About

- Website: https://www.chateaunantes.fr
- This file follows llms.txt (https://llmstxt.org): a short plain-text description for language models.
```

## Already right
- **robots.txt lets AI crawlers in.** No rule blocks the main AI user agents.
- **AI crawlers get the page.** GPTBot, ClaudeBot and PerplexityBot all got a normal response.
- **Structured data found (Organization).** no address, phone or hours in it
- **Tickets on your own site.** Agents can buy tickets without going through a marketplace.

## Where it stands
6 of 30 in Nantes tours, attractions and museums. Top 20% of the sites scanned in this index.

| What the top 10% of the index does | Top 10% | This site |
|---|---|---|
| Take bookings or orders on their own domain | 100% | yes |
| Publish the menu or price list as HTML | 50% | no |
| Let AI crawlers in (no block at the server or in robots.txt) | 100% | yes |
| Structured data with address, phone and hours | 10% | no |
| Have an llms.txt | 20% | no |

Nearest places in the index: Tour LU (B, 235 m, https://directindex.org/r/lelieuunique.com); Richou Voyages (B, 247 m, https://directindex.org/r/richou-voyages.fr); Salaün Holidays (A, 430 m, https://directindex.org/r/salaun-holidays.com); Escursia (D, 486 m, https://directindex.org/r/escursia.fr); FTO Inde (D, 489 m, https://directindex.org/r/fto-inde.com); Promovacances (B, 552 m, https://directindex.org/r/promovacances.com); Havas Voyages (B, 728 m, https://directindex.org/r/havas-voyages.fr); Illusion Nantes (B, 800 m, https://directindex.org/r/illusionnantes.fr); Loire Océan Voyages (F, 835 m, https://directindex.org/r/loireoceanvoyages.com); Passage Pommeraye (F, 847 m, https://directindex.org/r/passagepommeraye.fr).

## What assistants answer
The assistants haven't been asked about this business yet. They're asked about the top-ranked businesses in each city index, and about any business as soon as it's claimed. Claim this page to be included.


Compared with its peers: Sites built with WordPress 58% (30% A or B, 68857 sites); This site 75.4%.

See what an AI agent reads on this site: https://directindex.org/r/chateaunantes.fr/agent-view

## Businesses like Château des Ducs de Bretagne in Nantes tours, attractions and museums

| Group | Sites | Avg score | A or B | This site |
|---|---|---|---|---|
| Businesses of the same kind in Nantes tours, attractions and museums | 30 | 63% | 47% | 75.4% |
| Sites built with WordPress in Nantes tours, attractions and museums | 12 | 60% | 42% | 75.4% |

The best of the sites built with WordPress in Nantes tours, attractions and museums: Carrousel des Mondes Marins (B 75.4%, https://directindex.org/r/lesmachines-nantes.fr); The Zebra Crossing – Regulations and General Directions (B 75.4%, https://directindex.org/r/levoyageanantes.fr); Muséum d'Histoire Naturelle (B 73.8%, https://directindex.org/r/nantesmetropole.fr); Marine & Loire Croisières (B 72.3%, https://directindex.org/r/marineetloire.fr); Comptoir des voyages (C 58.5%, https://directindex.org/r/comptoirdesvoyages.fr).

With the two fixes above (No tickets and prices found; Structured data is incomplete), the score would be about 95.4%, which would be first of 30 in Nantes tours, attractions and museums.

## The direct record
What agents get for Château des Ducs de Bretagne, as JSON: https://directindex.org/api/direct/chateaunantes.fr
- Book: https://reservation.chateaunantes.fr/content (own site; found by the scan of 2026-10-16, not yet tested)
- Order: none on record
- Menu: none on record
- Hours: 08:30-19:00; Jul-Aug 08:30-20:00 (from OpenStreetMap)
- Phone: 0811464644
- Stable links that count: https://directindex.org/go/chateaunantes.fr/book

## Can an agent transact?
Measured, not scored (the score stays at spec v1.0).
- UCP profile (/.well-known/ucp, Google and Shopify's Universal Commerce Protocol): no
- ACP discovery document (/.well-known/acp.json, OpenAI and Stripe's Agentic Commerce Protocol): no
- MCP server card (/.well-known/mcp/server-card.json): no
- Ordering vendor that takes agent orders (Square, Toast, or a vendor whose terms allow agents): no

## Score breakdown
| Component | Points | Available |
|---|---|---|
| Reachable | 25 | 25 |
| Readable | 9 | 25 |
| Actionable | 15 | 15 (the action test: pending) |
| Cited | 0 | 0 (the assistant citation check: pending) |

## Agent readiness (Cloudflare)
Level 1 of 5, Basic Web Presence. Cloudflare's report: https://isitagentready.com/chateaunantes.fr
- Link headers on the homepage: no (how: https://isitagentready.com/.well-known/agent-skills/link-headers/SKILL.md)
- sitemap.xml: yes
- AI bot rules in robots.txt: yes
- Content Signals in robots.txt: no (how: https://isitagentready.com/.well-known/agent-skills/content-signals/SKILL.md)
- Markdown on Accept: text/markdown: no (how: https://isitagentready.com/.well-known/agent-skills/markdown-negotiation/SKILL.md)
- llms.txt: no (how: https://isitagentready.com/.well-known/agent-skills/llms-txt/SKILL.md)
- API catalog (RFC 9727): no (how: https://isitagentready.com/.well-known/agent-skills/api-catalog/SKILL.md)
- MCP server card: no (how: https://isitagentready.com/.well-known/agent-skills/mcp-server-card/SKILL.md)
- A2A agent card: no (how: https://isitagentready.com/.well-known/agent-skills/a2a-agent-card/SKILL.md)
- Agent Skills index: no (how: https://isitagentready.com/.well-known/agent-skills/agent-skills/SKILL.md)
- OAuth or OIDC discovery: no (how: https://isitagentready.com/.well-known/agent-skills/oauth-discovery/SKILL.md)
- OAuth protected resource metadata: no (how: https://isitagentready.com/.well-known/agent-skills/oauth-protected-resource/SKILL.md)
- auth.md: no (how: https://isitagentready.com/.well-known/agent-skills/auth-md/SKILL.md)
- Web Bot Auth key directory: no (how: https://isitagentready.com/.well-known/agent-skills/web-bot-auth/SKILL.md)
- ARD capability manifest: no (how: https://isitagentready.com/.well-known/agent-skills/ard/SKILL.md)
- DNS-AID records: no (how: https://isitagentready.com/.well-known/agent-skills/dns-aid/SKILL.md)
- WebMCP tools on the page: no (how: https://isitagentready.com/.well-known/agent-skills/webmcp/SKILL.md)
- JSON-LD for the business: yes

Keep watching this business (https://directindex.org/r/chateaunantes.fr/plan): the assistants are asked again every month, and you see what changed. 2 EUR a month or 19 EUR a year.
Deep report: https://directindex.org/r/chateaunantes.fr/deep. Ten questions phrased the way people ask them, each assistant's full answer, the eight nearest similar places, the fix plan and a PDF. 5 EUR, paid once. Reading and scanning stay free. These few euros pay for the questions sent to the assistants and for the servers.
Methodology: https://directindex.org/methodology · Rescan now: https://directindex.org/scan?url=chateaunantes.fr&force=1