# Gemeinschaftspraxis Jarkowski and Brethauer: Agent-Direct Score F (24.6%)

Site: https://www.zahn-jb.de/
Report: https://directindex.org/r/zahn-jb.de
Scanned: 2026-10-20 (Provisional, with the action test and the assistant citation check still to come. The hatched part of the bar isn't measured yet.)
Gemeinschaftspraxis Jarkowski and Brethauer is largely invisible to agents.
AI assistants can't open Gemeinschaftspraxis Jarkowski and Brethauer's website, so they go by what other sites say about it.

## Direct links
- Book directly: https://www.zahn-jb.de/online-terminbuchung.html (on the business's own site)
- Phone: 0221383141
- Address: Schönhauser Str. 57, 50968, Köln

## Nearby, also direct
Places near Gemeinschaftspraxis Jarkowski and Brethauer that take a booking or an order on their own website, with no marketplace in between.
- Praxis Giesen (130 m): https://directindex.org/r/physioharmony.care
- Praxis Nikola Schütte (130 m): https://directindex.org/r/hausarzt-praxis-koeln.de
- Beyondeye - Praxis Doctor-medic Roxana Fulga (130 m): https://directindex.org/r/beyondeye.de
- MVZ für Hals- Nasen- und Ohrenheilkunde Köln-Süd (140 m): https://directindex.org/r/hno-koelnsued.de
- Gemeinschaftspraxis für HNO-Heilkunde Dr. Imma Schneider und Polina Samusenko (160 m): https://directindex.org/r/hno-bayenthal.de

## What to fix first
- **The site turns away every visitor that isn't a browser, AI agents included.** (+25 points) A plain fetch was refused (http_503). Only a real browser got the page. Every AI crawler and agent gets turned away the same way, so Reachable scores 0 and the rest is measured on the page as the browser rendered it. Ask the host to let the AI user agents through. Guide: https://directindex.org/guides/blocking-ai-crawlers-without-knowing
- **No structured data for the business.** (+14 points) Add schema.org JSON-LD for the business (Dentist, MedicalClinic, Physiotherapy or the closest type, with name, address, telephone and openingHoursSpecification). Every assistant reads this block first, and the fix kit below has it filled in. Guide: https://directindex.org/guides/structured-data-restaurant
- **No list of services and prices found.** (+7 points) Agents answer 'what do they treat and what does it cost?' from directories instead. Add a page that lists services and prices as text, and link to it from the homepage. Guide: https://directindex.org/guides/menu-pdf-ai

## What the site tells visitors (Measured, not scored)
- **No English version declared.** Visitors from abroad, and assistants answering in English, read the page as it is. In Cologne, 5.5% of comparable sites declare one.

## 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": "LocalBusiness",
  "name": "Gemeinschaftspraxis Jarkowski and Brethauer",
  "url": "https://www.zahn-jb.de/",
  "telephone": "0221383141",
  "address": "Schönhauser Str. 57, 50968, Köln",
  "geo": {
    "@type": "GeoCoordinates",
    "latitude": 50.91107814,
    "longitude": 6.96374256
  },
  "potentialAction": [
    {
      "@type": "ReserveAction",
      "target": {
        "@type": "EntryPoint",
        "urlTemplate": "https://www.zahn-jb.de/online-terminbuchung.html",
        "actionPlatform": [
          "http://schema.org/DesktopWebPlatform",
          "http://schema.org/MobileWebPlatform"
        ]
      },
      "result": {
        "@type": "Reservation",
        "name": "Reservation"
      }
    }
  ]
}
</script>
```

## Already right
- **robots.txt lets AI crawlers in.** No rule blocks the main AI user agents.
- **Appointments on your own site.** Agents can book an appointment without going through a marketplace.

## Where it stands
2196 of 2402 in Cologne dentists, clinics and vets. Top 91% 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 | 98% | yes |
| Publish the menu or price list as HTML | 4% | no |
| Let AI crawlers in (no block at the server or in robots.txt) | 88% | no |
| Structured data with address, phone and hours | 19% | no |
| Have an llms.txt | 27% | no |

Nearest places in the index: Dr. Med. Peter Pelka (F, 11 m, https://directindex.org/r/dr-pelka.de); Parodontologie (C, 99 m, https://directindex.org/r/parodontologie-berater.de); Praxis Giesen (B, 131 m, https://directindex.org/r/physioharmony.care); Praxis Nikola Schütte (F, 132 m, https://directindex.org/r/hausarzt-praxis-koeln.de); Die Bayenthaler Kinderärzte Dr. Med. Tjalda Iliaev & Dr. Med. Vladimir Iliaev (D, 133 m, https://directindex.org/r/bayenthaler-kinderaerzte.de); Beyondeye - Praxis Doctor-medic Roxana Fulga (C, 133 m, https://directindex.org/r/beyondeye.de); Zahnfreude Kieferorthopädie (C, 133 m, https://directindex.org/r/zahnfreude-koeln.de); MVZ für Hals- Nasen- und Ohrenheilkunde Köln-Süd (B, 139 m, https://directindex.org/r/hno-koelnsued.de); Gemeinschaftspraxis für HNO-Heilkunde Dr. Imma Schneider und Polina Samusenko (C, 157 m, https://directindex.org/r/hno-bayenthal.de); Herr Edgar Mellenthin (D, 163 m, https://directindex.org/r/praxis-mellenthin.de).

## 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.

The assistants were asked 12 everyday questions about Cologne dentists, clinics and vets and named 58 places. Gemeinschaftspraxis Jarkowski and Brethauer wasn't one of them. See who was named: https://directindex.org/city/cologne-clinics/recommended


See what an AI agent reads on this site: https://directindex.org/r/zahn-jb.de/agent-view

## Businesses like Gemeinschaftspraxis Jarkowski and Brethauer in Cologne dentists, clinics and vets

| Group | Sites | Avg score | A or B | This site |
|---|---|---|---|---|
| Businesses of the same kind in Cologne dentists, clinics and vets | 2402 | 47% | 9% | 24.6% |

The best of the businesses of the same kind in Cologne dentists, clinics and vets: arthroprax Orthopädie Unfallchirurgie (A 95.4%, https://directindex.org/r/arthro-prax.de); Isabelle Schemien, Privatpraxis für Physiotherapie (A 90.8%, https://directindex.org/r/physiotherapie-schemien.de); Kassenzahnärztliche Bundesvereinigung Kdör - Institut Der Deutschen Zahnärzte (A 90.8%, https://directindex.org/r/idz.institute); Neurochirurgie-hristov (A 86.2%, https://directindex.org/r/hristov-medical.com); mamonova (A 86.2%, https://directindex.org/r/mamonova.de).

With the three fixes above (The site turns away every visitor that isn't a browser, AI agents included; No structured data for the business; No list of services and prices found), the score would be about 95.4%, which would be first of 2,402 in Cologne dentists, clinics and vets.

## The direct record
What agents get for Gemeinschaftspraxis Jarkowski and Brethauer, as JSON: https://directindex.org/api/direct/zahn-jb.de
- Book: https://www.zahn-jb.de/online-terminbuchung.html (own site; found by the scan of 2026-10-20, not yet tested)
- Order: none on record
- Menu: none on record
- Hours: none on record
- Phone: 0221383141
- Stable links that count: https://directindex.org/go/zahn-jb.de/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

Only a real browser got this page (a plain fetch got http_503); Readable and Actionable were measured on the rendered page.

## Score breakdown
| Component | Points | Available |
|---|---|---|
| Reachable | 0 | 25 |
| Readable | 1 | 25 |
| Actionable | 15 | 15 (the action test: pending) |
| Cited | 0 | 0 (the assistant citation check: pending) |

## Agent readiness (Cloudflare)
Not measured for this scan.
- JSON-LD for the business: no

Keep watching this business (https://directindex.org/r/zahn-jb.de/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/zahn-jb.de/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=zahn-jb.de&force=1