{ "agent_meta": { "type": "agent_product", "schema": "mcc_agent", "schema_version": "1.1", "generated_at": "2026-11-07", "source_of_truth": "MCC Commerce Engine" }, "request_context": { "language": { "id_lang": 1, "iso_code": "de", "url_prefix": "\/de\/" }, "delivery_country": { "id_country": 1, "iso_code": "DE" }, "currency": { "id_currency": 1, "iso_code": "EUR", "name": "Euro", "symbol": "\u20ac" }, "complete": true }, "context_switching": { "available": true, "mode": "on_demand_resolver", "stateless": true, "resolver": "links.agent.contexts", "fetch_when": "requested_context_differs", "dimensions": [ "language", "delivery_country", "currency" ], "unspecified_dimensions": "preserve_request_context", "selection": { "match": "exact", "source": "available_contexts", "result": "available_contexts[].target_url" }, "target": { "resource": "product", "id_product": 38 }, "full_context_in_target_url": true, "requires_session_persistence": false, "manual_url_construction_allowed": false, "instruction": "When a requested language, delivery country or currency differs from request_context, fetch links.agent.contexts. Preserve dimensions not explicitly changed by the user, select the exact matching entry and follow target_url unchanged." }, "platform": { "name": "MCC Agentic Commerce", "version": "1.0", "commerce_engine": "MCC Commerce Engine", "agent_interface": "MCC Agentic API" }, "instructions": { "purpose": "This endpoint provides the complete machine-readable representation of one product in the active language, delivery-country and currency context.", "rules": [ "All prices, taxes, availability and actions in data.product apply only to request_context.", "When variants exist, select the matching entry from data.product.variant_offers and use its exact price, availability and action URL.", "Do not infer a variant price from the product-level price or from another variant.", "Use the exact action.url supplied by the selected offer. Do not construct add-to-cart URLs manually.", "When language, delivery country or currency must change, fetch links.agent.contexts and follow the exact matching target_url unchanged.", "Prices, taxes, inventory and availability are calculated by the shop.", "Do not invent unavailable product, variant, price, stock, shipping or checkout information." ] }, "capabilities": { "root": true, "sitemap": true, "search": true, "product": true, "contexts": true, "category": true, "cart": true, "cms_page": false, "checkout": false }, "links": { "self": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=38&setCountry=1&setCurrency=1", "agent": { "root": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/root?setCountry=1&setCurrency=1", "sitemap": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/sitemap?setCountry=1&setCurrency=1", "search": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/search?setCountry=1&setCurrency=1", "cart": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/cart?setCountry=1&setCurrency=1", "product": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=38&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=38&setCountry=1&setCurrency=1" }, "human": { "home": "https:\/\/musiccraft-instruments.com\/", "sitemap": "https:\/\/musiccraft-instruments.com\/de\/sitemap", "search": "https:\/\/musiccraft-instruments.com\/de\/suche", "product": "https:\/\/musiccraft-instruments.com\/de\/p\/kontrabass-101-stefan-kreul-38.html", "cart": "https:\/\/musiccraft-instruments.com\/de\/bestellung", "contact": "https:\/\/musiccraft-instruments.com\/de\/kontaktiere-uns" } }, "commerce_model": { "pricing": "server_calculated", "tax": "server_calculated", "shipping": "server_calculated", "inventory": "live", "currencies": "context_based", "languages": "url_based" }, "data": { "product": { "@context": "https://schema.org", "@type": "Product", "@id": "https:\/\/musiccraft-instruments.com\/de\/p\/kontrabass-101-stefan-kreul-38.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/kontrabass-101-stefan-kreul-38.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=38&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=38&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/kontrabass-101-stefan-kreul-38.html" }, "id_product": 38, "name": "Kontrabass 101 \u2013 Kein Instrument. Eine Stimme.", "description": "Handgebauter Meisterkontrabass von Stefan Kreul. Gebaut aus jahrzehntelang gelagertem Resonanzholz f\u00fcr Musiker, die nicht einfach nur spielen wollen \u2013 sondern klingen.", "full_description": "Manche Instrumente begleiten dich. Und manche ver\u00e4ndern komplett, wie du Musik f\u00fchlst. Der Kontrabass 101 von Stefan Kreul geh\u00f6rt ganz klar zur zweiten Sorte. Schon optisch wird klar: Das hier ist keine industrielle Massenware. Keine schnelle Hochglanzproduktion. Dieser Bass wurde gebaut wie echte Handwerkskunst gebaut werden sollte \u2013 langsam, pr\u00e4zise und mit einem enormen Respekt vor Klang. In der Meisterwerkstatt von Stefan Kreul in Markneukirchen entstehen seit Generationen Instrumente f\u00fcr Musiker mit h\u00f6chsten Anspr\u00fcchen. Die Familiengeschichte reicht bis ins Jahr 1889 zur\u00fcck. Dieses Wissen steckt nicht als Marketinggeschichte im Hintergrund \u2013 man h\u00f6rt es in jedem Ton. Der Kontrabass 101 in Gambenform liefert einen gro\u00dfen, offenen und tragenden Klang mit enormer Tiefe. Der Pappelboden sorgt f\u00fcr W\u00e4rme und Volumen, w\u00e4hrend die sorgf\u00e4ltig ausgew\u00e4hlte Fichtendecke Ansprache und Dynamik bringt. Zusammen entsteht ein Ton, der nicht einfach laut ist \u2013 sondern pr\u00e4sent. Ein Klang, der stehen bleibt. Gefertigt wird der Bass aus hervorragend abgelagertem Resonanzholz in sorgf\u00e4ltiger Handarbeit. Spirituslackierung, Ebenholzgriffbrett, Rubner-Einzelmechanik und Belcanto-Saiten zeigen schnell, dass hier nicht an Details gespart wurde.\u00a0 Und genau das sp\u00fcrt man beim Spielen. Der Bass reagiert direkt, bleibt kontrollierbar und entwickelt dabei diese seltene Mischung aus Kraft und musikalischer Offenheit. F\u00fcr Jazz. Klassik. Kammermusik. Studioarbeit. B\u00fchne. Oder einfach f\u00fcr Musiker, die ein Instrument suchen, das nicht begrenzt, sondern inspiriert. Die Instrumente von Stefan Kreul entstehen nicht nach Flie\u00dfbandlogik. Modelle, W\u00f6lbungen und Bauweisen werden bewusst gew\u00e4hlt, um unterschiedliche Klangcharaktere und Spielgef\u00fchle zu erzeugen. Genau deshalb wirken diese Instrumente so lebendig und individuell. Das hier kauft man nicht einfach. Das hier begleitet einen \u00fcber Jahrzehnte. Handwerk aus Markneukirchen. F\u00fcr Menschen, die Musik nicht perfekt brauchen. Sondern echt.", "additional_text": "Meisterkontrabass in Gambenform \n Handgefertigt von Geigenbaumeister Stefan Kreul \n Pappelboden und hochwertige Fichtendecke \n Aus hervorragend abgelagertem Resonanzholz gefertigt \n Ebenholzgriffbrett \n Rubner-Einzelmechanik \n Belcanto-Saiten \n Spiritus-Handlackierung \n Dunkel oder hellbraun schattiert erh\u00e4ltlich \n Traditioneller Handbau aus Markneukirchen \n Made in Germany", "sku": "213\/101", "mpn": "213\/101", "ean13": "", "upc": "", "brand": { "@type": "Brand", "name": "Stefan Kreul \u2013 Master Luthier for Cellos & Double Basses", "url": "https:\/\/musiccraft-instruments.com\/de\/stefan-kreul-master-luthier-for-cellos-double-basses_12" }, "manufacturer": { "@type": "Organization", "id_manufacturer": 12, "name": "Stefan Kreul \u2013 Master Luthier for Cellos & Double Basses", "url": "https:\/\/musiccraft-instruments.com\/de\/stefan-kreul-master-luthier-for-cellos-double-basses_12" }, "supplier": { "@type": "Organization", "id_supplier": 1, "name": "Migma e.G." }, "main_category": { "id_category": 24, "name": "Kontrab\u00e4sse", "link_rewrite": "kontrabaesse", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=24&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/kontrabaesse-24" } }, "categories": [ { "id_category": 4, "name": "Instrumente", "link_rewrite": "instrumente", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=4&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/instrumente-4" } }, { "id_category": 6, "name": "Equipment & Essentials", "link_rewrite": "equipment-essentials", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=6&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/equipment-essentials-6" } }, { "id_category": 7, "name": "Restauration", "link_rewrite": "restauration", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=7&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/restauration-7" } }, { "id_category": 5, "name": "Highlight", "link_rewrite": "highlight", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=5&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/highlight-5" } } ], "features": [ { "id_feature": 1, "id_feature_value": 3, "name": "Produkttyp", "value": "Einzelartikel" }, { "id_feature": 15, "id_feature_value": 130, "name": "Besteuerung", "value": "Standard Rate" }, { "id_feature": 9, "id_feature_value": 323, "name": "Instrument", "value": "Kontrabass" } ], "agent_faqs": [ ], "images": [ { "id_image": 2112, "cover": true, "position": 1, "legend": "Kontrabass 101 von Stefan Kreul", "url": "https:\/\/cdn2.musiccraft-instruments.com\/2112-large_default\/kontrabass-101-stefan-kreul.webp" }, { "id_image": 2113, "cover": false, "position": 2, "legend": "Kontrabass 101 von Stefan Kreul", "url": "https:\/\/cdn2.musiccraft-instruments.com\/2113-large_default\/kontrabass-101-stefan-kreul.webp" } ], "shipping_weight": { "@type": "QuantitativeValue", "value": 12, "unitCode": "KGM", "note": "Shipping weight, not product content." }, "variant_model": { "has_variants": false, "variant_count": 0, "default_id_product_attribute": 0 }, "offers": { "@type": "Offer", "offer_scope": "product", "id_product": 38, "id_product_attribute": 0, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/kontrabass-101-stefan-kreul-38.html", "price": 17900.00, "priceCurrency": "EUR", "availability": "https://schema.org/InStock", "itemCondition": "https://schema.org/NewCondition", "seller": { "@type": "Organization", "name": "musiccraft - instruments", "url": "https:\/\/musiccraft-instruments.com\/", "telephone": "+49 (0) 34 20 63 14 888" }, "priceSpecification": { "@type": "PriceSpecification", "price": 17900.00, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } , "action": { "type": "add_to_cart", "method": "GET", "enabled": true, "quantity": 1, "url": "https:\/\/musiccraft-instruments.com\/de\/warenkorb?add=1&id_product=38&qty=1&setCountry=1&setCurrency=1" } }, "variant_offers": [ ], "pricing": { "scope": "product", "default_id_product_attribute": 0, "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 17900.00, "price_tax_excluded": 15042.02, "price_without_reduction": 15042.02, "reduction_percent": 0, "reduction_price": 0 }, "availability": { "status": "https://schema.org/InStock", "orderable": true, "available_for_order": true, "show_price": true, "quantity": 10, "minimal_quantity": 1, "variant_stock_available": false, "allow_buy_when_out_of_stock": false, "stock_management": false, "is_virtual": false } }, "actions": { "add_to_cart": { "type": "cart_add", "method": "GET", "requires_context": true, "required_context_parameters": [ "setCountry", "setCurrency" ], "instruction": "Use the exact action.url from data.product.offers for a simple product or from the selected data.product.variant_offers entry. Respect action.enabled and action.quantity." } } } }