# Plenum: Agent-Direct Score C (60%)

Site: https://restaurant-plenum-stuttgart.de
Report: https://directindex.org/r/restaurant-plenum-stuttgart.de
Scanned: 2026-10-16 (Provisional: the action test and the assistant citation check still to come; the hatched part of the bar is not measured yet.)
Plenum is partly visible to agents.
An AI assistant can open the website of Plenum. What Plenum offers is in a PDF or an image, which assistants read poorly. It finds a way to book or order directly, through OpenTable.

## Direct links
- Book directly: https://www.opentable.de/widget/reservation/loader?rid=339576&type=standard&theme=standard&color=2&dark=false&iframe=true&domain=de&lang=de-DE&newtab=false&ot_source=Restaurant%20website&cfe=true (through opentable acting for the business)
- Menu: https://www.restaurant-plenum-stuttgart.de/download/menue.pdf
- Phone: +49 711 30000016

## What to fix first
- **No structured data for the business.** (+15 points) Add schema.org JSON-LD for the business (Restaurant, LocalBusiness or the closest type, with name, address, telephone and openingHoursSpecification, plus servesCuisine and acceptsReservations). It is the one block every assistant reads first; the fix kit below has it filled in. Guide: https://directindex.org/guides/structured-data-restaurant
- **Menu or price list is a PDF.** (+3 points) Most agents skip PDFs or read them badly. Publish it as HTML, keep the PDF as a download. Guide: https://directindex.org/guides/menu-pdf-ai
- **No llms.txt.** (no points, still worth doing) Optional today, cheap to add: a short text file describing the business for language models. Guide: https://directindex.org/guides/llms-txt-for-a-business

## Fix kit: What to paste

Structured data (JSON-LD). One block in the page's head, or in the builder's custom-code slot. Replace anything that is wrong.

```html
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Restaurant",
  "name": "Plenum",
  "url": "https://restaurant-plenum-stuttgart.de",
  "telephone": "+49 711 30000016",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "Konrad-Adenauer-Straße 3",
    "postalCode": "70173",
    "addressLocality": "Stuttgart",
    "addressCountry": "DE"
  },
  "geo": {
    "@type": "GeoCoordinates",
    "latitude": 48.7786527,
    "longitude": 9.1833095
  },
  "openingHours": "Mo-Sa 11:00-23:00; Su 11:00-22:00",
  "openingHoursSpecification": [
    {
      "@type": "OpeningHoursSpecification",
      "dayOfWeek": [
        "Monday",
        "Tuesday",
        "Wednesday",
        "Thursday",
        "Friday",
        "Saturday"
      ],
      "opens": "11:00",
      "closes": "23:00"
    },
    {
      "@type": "OpeningHoursSpecification",
      "dayOfWeek": [
        "Sunday"
      ],
      "opens": "11:00",
      "closes": "22:00"
    }
  ],
  "acceptsReservations": "https://www.opentable.de/widget/reservation/loader?rid=339576&type=standard&theme=standard&color=2&dark=false&iframe=true&domain=de&lang=de-DE&newtab=false&ot_source=Restaurant%20website&cfe=true",
  "hasMenu": "https://www.restaurant-plenum-stuttgart.de/download/menue.pdf",
  "potentialAction": [
    {
      "@type": "ReserveAction",
      "target": {
        "@type": "EntryPoint",
        "urlTemplate": "https://www.opentable.de/widget/reservation/loader?rid=339576&type=standard&theme=standard&color=2&dark=false&iframe=true&domain=de&lang=de-DE&newtab=false&ot_source=Restaurant%20website&cfe=true",
        "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.

```
# Plenum

> restaurant in Konrad-Adenauer-Straße 3 70173 Stuttgart, Stuttgart. Phone +49 711 30000016.

## Book or order directly

- Book: https://www.opentable.de/widget/reservation/loader?rid=339576&type=standard&theme=standard&color=2&dark=false&iframe=true&domain=de&lang=de-DE&newtab=false&ot_source=Restaurant%20website&cfe=true (through opentable acting for the business)
- Menu: https://www.restaurant-plenum-stuttgart.de/download/menue.pdf

## Opening hours

Mo-Sa 11:00-23:00; Su 11:00-22:00

## About

- Website: https://restaurant-plenum-stuttgart.de
- This file follows llms.txt (https://llmstxt.org): a short plain-text description for language models.
```

## Already right
- **robots.txt lets AI crawlers in.** There is no robots.txt, which allows everything.
- **AI crawlers get the page.** GPTBot, ClaudeBot and PerplexityBot all received a normal response.
- **Booking through opentable on your own domain.** No marketplace commission, and the guest stays yours.
- **OpenTable works with agents through its partners.** OpenTable's terms page could not be fetched on 2026-10-15; OpenTable names over 200 authorized partners, Google, Meta and OpenAI among them, as the channels through which agents book. Read 2026-10-15: https://mynews13.com/fl/orlando/business/2026/07/14/opentable-new-terms. An assistant that is not a partner may not finish the step there; a direct path on your own domain works for all of them.

## Since the scan of 2026-10-16 (C then)
- Fixed: nothing
- New: nothing

## Where it stands
313 of 755 in Stuttgart. Top 41% of the sites scanned in this index.

| What the top tenth of the index does | Top 10% | This site |
|---|---|---|
| Take bookings or orders on their own domain | 90% | yes |
| Publish the menu or price list as HTML | 83% | no |
| Let AI crawlers in (no edge block, no robots.txt block) | 94% | yes |
| Structured data with address, phone and hours | 35% | no |
| Have an llms.txt | 30% | no |

Nearest places in the index: LIB-ROOM (B, 148 m, https://directindex.org/r/lib-room.de); Carls Brauhaus (C, 240 m, https://directindex.org/r/carls-brauhaus.de); Zum Becher (C, 292 m, https://directindex.org/r/zum-becher.de); Amadeus (A, 331 m, https://directindex.org/r/amadeus-stuttgart.de); Esszimmer (F, 332 m, https://directindex.org/r/nits-thaikueche.de); Alte Kanzlei (B, 360 m, https://directindex.org/r/alte-kanzlei-stuttgart.de); Nesenbach Brauhaus (A, 366 m, https://directindex.org/r/nesenbach-stuttgart.de); Ambiente Africa (C, 368 m, https://directindex.org/r/restaurantafrika.de); Enso Sushi & Grill (C, 381 m, https://directindex.org/r/enso-stuttgart.de); Martha's (C, 381 m, https://directindex.org/r/marthas-stuttgart.de).

## What assistants answer
Not asked yet. Assistants are asked about the top-ranked businesses in each city index, and about every claimed business the moment it is claimed; claim this page to be included.

Against its peers: Sites using OpenTable 66% (40% A or B, 1647 sites); This site 60%.

See what an AI agent reads on this site: https://directindex.org/r/restaurant-plenum-stuttgart.de/agent-view

## Businesses like Plenum in Stuttgart

| Group | Sites | Avg score | A or B | This site |
|---|---|---|---|---|
| Businesses of the same kind in Stuttgart | 755 | 54% | 26% | 60% |
| Sites using OpenTable in Stuttgart | 23 | 58% | 17% | 60% |

The best of the sites using OpenTable in Stuttgart: Marktstüble (B 80%, https://directindex.org/r/looss-kulinarisches.de); Trattoria Santa Lucia (B 78.5%, https://directindex.org/r/santalucia-stuttgart.de); The Nosh (B 73.8%, https://directindex.org/r/thenosh.de); Wilma Wunder (B 72.3%, https://directindex.org/r/wilma-wunder.de); Hend'l & Gretel (C 67.7%, https://directindex.org/r/hendlundgretel.de).

With the two fixes above (No structured data for the business; Menu or price list is a PDF) the score would be about 87.7%: 26th of 755 in Stuttgart, up from 313th.

## The direct record
What agents get for Plenum, as JSON: https://directindex.org/api/direct/restaurant-plenum-stuttgart.de
- Book: https://www.opentable.de/widget/reservation/loader?rid=339576&type=standard&theme=standard&color=2&dark=false&iframe=true&domain=de&lang=de-DE&newtab=false&ot_source=Restaurant%20website&cfe=true (vendor on own site: OpenTable; found by the scan of 2026-10-16, not yet tested)
- Order: none on record
- Menu: https://www.restaurant-plenum-stuttgart.de/download/menue.pdf (pdf; from the scan)
- Hours: Mo-Sa 11:00-23:00; Su 11:00-22:00 (open now) (from OpenStreetMap)
- Phone: +49 711 30000016
- Stable links that count: https://directindex.org/go/restaurant-plenum-stuttgart.de/book, https://directindex.org/go/restaurant-plenum-stuttgart.de/menu

## 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
- Vendor terms for agents, OpenTable: Through partners. OpenTable's terms page could not be fetched on 2026-10-15; OpenTable names over 200 authorized partners, Google, Meta and OpenAI among them, as the channels through which agents book. Read 2026-10-15: https://mynews13.com/fl/orlando/business/2026/07/14/opentable-new-terms

## Score breakdown
| Component | Points | Available |
|---|---|---|
| Reachable | 25 | 25 |
| Readable | 4 | 25 |
| Actionable | 10 | 15 (the action test: pending) |
| Cited | 0 | 0 (the assistant citation check: pending) |

## Agent readiness (Cloudflare)
Level 0 of 5, Not Ready. Cloudflare's report: https://isitagentready.com/restaurant-plenum-stuttgart.de
- Link headers on the homepage: no (how: https://isitagentready.com/.well-known/agent-skills/link-headers/SKILL.md)
- sitemap.xml: no (how: https://isitagentready.com/.well-known/agent-skills/sitemap/SKILL.md)
- AI bot rules in robots.txt: no (how: https://isitagentready.com/.well-known/agent-skills/ai-rules/SKILL.md)
- 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: no

Keep watching this business (https://directindex.org/r/restaurant-plenum-stuttgart.de/plan): the assistants asked again every month, with what changed; 2 EUR a month or 19 EUR a year.
Deep report: https://directindex.org/r/restaurant-plenum-stuttgart.de/deep. Ten questions the way people ask, each assistant's full answer, the eight nearest similar places, the fix plan and a PDF: 5 EUR, one-off. 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=restaurant-plenum-stuttgart.de&force=1