# Cardio & Health Centrum: Agent-Direct Score F (29.2%)

Site: http://www.chc-medienhafen.de/
Report: https://directindex.org/r/cardio-health-im-medienhafen.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.)
Cardio & Health Centrum is largely invisible to agents.
AI assistants can't open Cardio & Health Centrum's website, so they go by what other sites say about it.

## Direct links
- Book directly: https://www.doctolib.de/privatpraxis/duesseldorf/cardio-health-centrum/booking (through doctolib acting for the business)
- Phone: +4921195432210
- Address: Neuer Zollhof 3, 40221, Düsseldorf

## Nearby, also direct
Places near Cardio & Health Centrum that take a booking or an order on their own website, with no marketplace in between.
- Plastmed Privatklinik (50 m): https://directindex.org/r/plastmed.de
- Pour.dent (100 m): https://directindex.org/r/pourdent.de
- Zahnärzte im Stadttor (190 m): https://directindex.org/r/za-stadttor.de
- Miron Aesthetics (300 m): https://directindex.org/r/miron-aesthetics.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 (TimeoutError: The operation was aborted due to timeout). 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 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
- **Structured data is incomplete.** (+6 points) Missing: address, telephone, opening hours. Guide: https://directindex.org/guides/structured-data-restaurant

## 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 Düsseldorf, 9.2% 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": "Organization",
  "name": "Cardio & Health Centrum",
  "url": "http://www.chc-medienhafen.de/",
  "telephone": "+4921195432210",
  "address": "Neuer Zollhof 3, 40221, Düsseldorf",
  "geo": {
    "@type": "GeoCoordinates",
    "latitude": 51.21635102,
    "longitude": 6.75857499
  },
  "potentialAction": [
    {
      "@type": "ReserveAction",
      "target": {
        "@type": "EntryPoint",
        "urlTemplate": "https://www.doctolib.de/privatpraxis/duesseldorf/cardio-health-centrum/booking",
        "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.
- **Structured data found (Organization).** no address, phone or hours in it
- **Appointments through doctolib on your own domain.** There's no marketplace commission, and the customer stays yours.

## Where it stands
1382 of 1628 in Düsseldorf dentists, clinics and vets. Top 85% 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 | 96% | yes |
| Publish the menu or price list as HTML | 8% | no |
| Let AI crawlers in (no block at the server or in robots.txt) | 89% | no |
| Structured data with address, phone and hours | 16% | no |
| Have an llms.txt | 27% | no |

Nearest places in the index: Health & Care Medical Prevention (F, 11 m, https://directindex.org/r/healthcare-prevention.de); Plastmed Privatklinik (B, 49 m, https://directindex.org/r/plastmed.de); Laja (D, 103 m, https://directindex.org/r/zahnarztpraxis-medienhafen.de); Pour.dent (F, 103 m, https://directindex.org/r/pourdent.de); Healthy Aesthetics (D, 105 m, https://directindex.org/r/healthy-aesthetics.de); Impecto - Björn Lange (C, 105 m, https://directindex.org/r/impecto.de); Zahnärzte im Stadttor (C, 188 m, https://directindex.org/r/za-stadttor.de); Zahnarzt Düsseldorf - Dental21 (C, 238 m, https://directindex.org/r/dental21-medienhafen.de); Zahnarztpraxis Leander Gottfried (D, 246 m, https://directindex.org/r/zahnarztpraxis-gottfried.de); Miron Aesthetics (D, 304 m, https://directindex.org/r/miron-aesthetics.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.


Compared with its peers: Sites built with WordPress 58% (29% A or B, 108921 sites); Sites using Doctolib 55% (8% A or B, 2742 sites); This site 29.2%.

See what an AI agent reads on this site: https://directindex.org/r/cardio-health-im-medienhafen.de/agent-view

## Businesses like Cardio & Health Centrum in Düsseldorf dentists, clinics and vets

| Group | Sites | Avg score | A or B | This site |
|---|---|---|---|---|
| Businesses of the same kind in Düsseldorf dentists, clinics and vets | 1628 | 46% | 9% | 29.2% |
| Sites built with WordPress in Düsseldorf dentists, clinics and vets | 688 | 55% | 17% | 29.2% |
| Sites using Doctolib in Düsseldorf dentists, clinics and vets | 219 | 56% | 9% | 29.2% |
| Sites built with WordPress and using Doctolib in Düsseldorf dentists, clinics and vets | 130 | 58% | 12% | 29.2% |

The best of the sites built with WordPress and using Doctolib in Düsseldorf dentists, clinics and vets: Dr. Med. Daniel Stosch (B 76.9%, https://directindex.org/r/orthopaedie-grunerstrasse.de); Institut Für Prävention Und Sportmedizin (B 76.9%, https://directindex.org/r/cardio-centrum.com); Kardiologische Gemeinschaftspraxis Kardiologen (B 76.9%, https://directindex.org/r/cardio-centrum.com); Preventicsone - Facharztzentrum Für Prävention, Kardiologie Und Sportmedizin (B 76.9%, https://directindex.org/r/preventics.one); DYADERM | DERMATOLOGIE & ÄSTHETIK DÜSSELDORF | DIMITRIOS GEORGAS (B 75.4%, https://directindex.org/r/dyaderm.de).

With the three fixes above (The site turns away every visitor that isn't a browser, AI agents included; No list of services and prices found; Structured data is incomplete), the score would be about 87.7%. That would be 3rd of 1,628 in Düsseldorf dentists, clinics and vets, up from 1382nd.

## The direct record
What agents get for Cardio & Health Centrum, as JSON: https://directindex.org/api/direct/cardio-health-im-medienhafen.de
- Book: https://www.doctolib.de/privatpraxis/duesseldorf/cardio-health-centrum/booking (vendor on own site: Doctolib; found by the scan of 2026-10-20, not yet tested)
- Order: none on record
- Menu: none on record
- Hours: none on record
- Phone: +4921195432210
- Stable links that count: https://directindex.org/go/cardio-health-im-medienhafen.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
- Vendor terms for agents, Doctolib: Not stated. Doctolib's patient terms (April 2026), article 19, forbid web scraping and make automated data harvesting subject to Doctolib's prior consent; they do not address an agent booking an appointment for a patient, and no API or partner path for agents is documented. Read 2026-10-15: https://media.doctolib.com/image/upload/v1776929137/legal/B2C_T_Cs.pdf

Only a real browser got this page (a plain fetch got TimeoutError: The operation was aborted due to timeout); Readable and Actionable were measured on the rendered page.

## Score breakdown
| Component | Points | Available |
|---|---|---|
| Reachable | 0 | 25 |
| Readable | 9 | 25 |
| Actionable | 10 | 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: yes

Keep watching this business (https://directindex.org/r/cardio-health-im-medienhafen.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/cardio-health-im-medienhafen.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=cardio-health-im-medienhafen.de&force=1