{ "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": 117 }, "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=117&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=117&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=117&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\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.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\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=117&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=117&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.html" }, "id_product": 117, "name": "Wittner Ultra Saitenhalter f\u00fcr Cello \u2013 Stabilit\u00e4t ohne Ballast", "description": "Der Wittner Ultra Saitenhalter f\u00fcr Cello kombiniert moderne Leichtbauweise mit integrierten Feinstimmern und unterst\u00fctzt eine freie, kontrollierte Ansprache.", "full_description": "Beim Cello z\u00e4hlt nicht nur Kraft. Sondern Kontrolle. Der Wittner Ultra Saitenhalter f\u00fcr Cello wurde entwickelt, um Gewicht zu reduzieren und gleichzeitig Stabilit\u00e4t und Stimmkomfort zu verbessern. Die moderne Hi-Tec-Verbundkonstruktion sorgt f\u00fcr eine ausgewogene Balance zwischen Resonanz, Haltbarkeit und Alltagstauglichkeit. Durch die integrierten Feinstimmer wird das Stimmen direkter und komfortabler, ohne zus\u00e4tzliche Bauteile am Instrument. Gerade beim Cello kann ein leichter und sauber abgestimmter Saitenhalter das gesamte Spielgef\u00fchl sp\u00fcrbar beeinflussen \u2014 von der Ansprache bis zur Kontrolle im Ton. Erh\u00e4ltlich f\u00fcr verschiedene Cello-Gr\u00f6\u00dfen eignet sich der Wittner Ultra sowohl f\u00fcr Sch\u00fcler- als auch Konzertinstrumente. Weniger Gewicht am Instrument. Mehr Fokus auf den Klang.", "additional_text": "Wittner Ultra Saitenhalter f\u00fcr Cello \n Erh\u00e4ltlich f\u00fcr verschiedene Cello-Gr\u00f6\u00dfen \n Mit integrierten Feinstimmern \n Leichte Hi-Tec-Verbundkonstruktion \n Unterst\u00fctzt freie Resonanz und kontrollierte Ansprache \n Farbe: Schwarz \n Ideal f\u00fcr Unterricht, B\u00fchne und Studio", "sku": "819\/530", "mpn": "819\/530", "ean13": "", "upc": "", "brand": { "@type": "Brand", "name": "Wittner \u2013 Division of GEWA music GmbH", "url": "https:\/\/musiccraft-instruments.com\/de\/wittner-division-of-gewa-music-gmbh_19" }, "manufacturer": { "@type": "Organization", "id_manufacturer": 19, "name": "Wittner \u2013 Division of GEWA music GmbH", "url": "https:\/\/musiccraft-instruments.com\/de\/wittner-division-of-gewa-music-gmbh_19" }, "supplier": { "@type": "Organization", "id_supplier": 1, "name": "Migma e.G." }, "main_category": { "id_category": 77, "name": "Saitenhalter", "link_rewrite": "saitenhalter", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=77&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/saitenhalter-77" } }, "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": 1, "name": "Produkttyp", "value": "Zubeh\u00f6r" }, { "id_feature": 1, "id_feature_value": 150, "name": "Produkttyp", "value": "Ersatzteile" }, { "id_feature": 15, "id_feature_value": 130, "name": "Besteuerung", "value": "Standard Rate" }, { "id_feature": 9, "id_feature_value": 325, "name": "Instrument", "value": "Cello" }, { "id_feature": 28, "id_feature_value": 328, "name": "Bestandteile", "value": "Saitenhalter" }, { "id_feature": 29, "id_feature_value": 355, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "1\/4 + 1\/8 Gr\u00f6\u00dfe" }, { "id_feature": 29, "id_feature_value": 354, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "1\/2 + 3\/4 Gr\u00f6\u00dfe" }, { "id_feature": 29, "id_feature_value": 353, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "4\/4 + 7\/8 Gr\u00f6\u00dfe" }, { "id_feature": 2, "id_feature_value": 502, "name": "Besonderheit", "value": "Verschiedene Varianten" }, { "id_feature": 2, "id_feature_value": 350, "name": "Besonderheit", "value": "Hi-Tec-Verbundwerkstoff" } ], "agent_faqs": [ ], "images": [ { "id_image": 2326, "cover": true, "position": 1, "legend": "Wittner Ultra Saitenhalter f\u00fcr Cello \u2013 Stabilit\u00e4t ohne Ballast", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2326-large_default\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast.webp" } ], "shipping_weight": { "@type": "QuantitativeValue", "value": 0.2, "unitCode": "KGM", "note": "Shipping weight, not product content." }, "variant_model": { "has_variants": true, "variant_count": 3, "default_id_product_attribute": 381 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 117, "id_product_attribute": 381, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.html", "price": 34.90, "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": 34.90, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 117, "id_product_attribute": 382, "is_default": false, "sku": "819\/531", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/1-large_default\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "1\/2 + 3\/4 Gr\u00f6\u00dfe" } ], "attribute_summary": "Gr\u00f6\u00dfe: 1\/2 + 3\/4 Gr\u00f6\u00dfe", "price": { "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 29.33, "tax_included": 34.90, "without_reduction_tax_excluded": 29.33, "without_reduction_tax_included": 34.90, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 5, "minimal_quantity": 1, "action": { "type": "add_to_cart", "method": "GET", "enabled": true, "quantity": 1, "url": "https:\/\/musiccraft-instruments.com\/de\/warenkorb?add=1&id_product=117&id_product_attribute=382&qty=1&setCountry=1&setCurrency=1" } }, { "@type": "Offer", "id_product": 117, "id_product_attribute": 383, "is_default": false, "sku": "819\/532", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/1-large_default\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "1\/4 + 1\/8 Gr\u00f6\u00dfe" } ], "attribute_summary": "Gr\u00f6\u00dfe: 1\/4 + 1\/8 Gr\u00f6\u00dfe", "price": { "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 29.33, "tax_included": 34.90, "without_reduction_tax_excluded": 29.33, "without_reduction_tax_included": 34.90, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 5, "minimal_quantity": 1, "action": { "type": "add_to_cart", "method": "GET", "enabled": true, "quantity": 1, "url": "https:\/\/musiccraft-instruments.com\/de\/warenkorb?add=1&id_product=117&id_product_attribute=383&qty=1&setCountry=1&setCurrency=1" } }, { "@type": "Offer", "id_product": 117, "id_product_attribute": 381, "is_default": true, "sku": "819\/530", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast-117.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/1-large_default\/wittner-ultra-saitenhalter-fuer-cello-stabilitaet-ohne-ballast.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "4\/4 + 7\/8 Gr\u00f6\u00dfe" } ], "attribute_summary": "Gr\u00f6\u00dfe: 4\/4 + 7\/8 Gr\u00f6\u00dfe", "price": { "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 29.33, "tax_included": 34.90, "without_reduction_tax_excluded": 29.33, "without_reduction_tax_included": 34.90, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 5, "minimal_quantity": 1, "action": { "type": "add_to_cart", "method": "GET", "enabled": true, "quantity": 1, "url": "https:\/\/musiccraft-instruments.com\/de\/warenkorb?add=1&id_product=117&id_product_attribute=381&qty=1&setCountry=1&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 381, "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 34.90, "price_tax_excluded": 29.33, "price_without_reduction": 29.33, "reduction_percent": 0, "reduction_price": 0 }, "availability": { "status": "https://schema.org/InStock", "orderable": true, "available_for_order": true, "show_price": true, "quantity": 15, "minimal_quantity": 1, "variant_stock_available": true, "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." } } } }