{ "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": 116 }, "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=116&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=116&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=116&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-viola-116.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-viola-116.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-viola-116.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=116&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=116&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-viola-116.html" }, "id_product": 116, "name": "Wittner Ultra Saitenhalter f\u00fcr Viola \u2013 Weniger Gewicht f\u00fcr mehr Kontrolle", "description": "Der Wittner Ultra Saitenhalter f\u00fcr Viola verbindet moderne Leichtbauweise mit integrierten Feinstimmern und ist f\u00fcr verschiedene Viola-Gr\u00f6\u00dfen erh\u00e4ltlich.", "full_description": "Die Viola bringt von Natur aus schon genug Gewicht mit. Da muss der Rest nicht zus\u00e4tzlich belasten. Der Wittner Ultra Saitenhalter f\u00fcr Viola wurde entwickelt, um das Instrument leichter, ausgewogener und komfortabler spielbar zu machen. Die moderne Hi-Tec-Konstruktion reduziert unn\u00f6tiges Gewicht und unterst\u00fctzt gleichzeitig eine freie Ansprache und stabile Stimmung. Dank der integrierten Feinstimmer entsteht ein aufger\u00e4umtes Setup mit direkter Kontrolle beim Stimmen. Besonders praktisch: Der Saitenhalter ist f\u00fcr mehrere Viola-Gr\u00f6\u00dfen erh\u00e4ltlich und eignet sich dadurch sowohl f\u00fcr kleinere Instrumente als auch f\u00fcr gro\u00dfe Konzertviolen. Typisch Wittner steht dabei nicht Technik im Mittelpunkt \u2014 sondern das entspannte Gef\u00fchl, einfach spielen zu k\u00f6nnen. Leichter gebaut. Schwer in Ordnung.", "additional_text": "Wittner Ultra Saitenhalter f\u00fcr Viola \n Erh\u00e4ltlich f\u00fcr verschiedene Viola-Gr\u00f6\u00dfen \n Mit integrierten Feinstimmern \n Leichte Hi-Tec-Verbundkonstruktion \n Unterst\u00fctzt freie Resonanz und Ansprache \n Farbe: Schwarz \n Ideal f\u00fcr Unterricht, B\u00fchne und Alltag", "sku": "819\/520", "mpn": "819\/520", "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": 150, "name": "Produkttyp", "value": "Ersatzteile" }, { "id_feature": 1, "id_feature_value": 1, "name": "Produkttyp", "value": "Zubeh\u00f6r" }, { "id_feature": 15, "id_feature_value": 130, "name": "Besteuerung", "value": "Standard Rate" }, { "id_feature": 9, "id_feature_value": 149, "name": "Instrument", "value": "Viola" }, { "id_feature": 28, "id_feature_value": 328, "name": "Bestandteile", "value": "Saitenhalter" }, { "id_feature": 29, "id_feature_value": 352, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "38,0 cm - 39,5 cm" }, { "id_feature": 29, "id_feature_value": 351, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "39,5 cm - 41,5 cm" }, { "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": 2325, "cover": true, "position": 1, "legend": "Wittner Ultra Saitenhalter f\u00fcr Viola \u2013 Weniger Gewicht f\u00fcr mehr Kontrolle", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2325-large_default\/wittner-ultra-saitenhalter-viola.webp" } ], "shipping_weight": { "@type": "QuantitativeValue", "value": 0.2, "unitCode": "KGM", "note": "Shipping weight, not product content." }, "variant_model": { "has_variants": true, "variant_count": 2, "default_id_product_attribute": 379 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 116, "id_product_attribute": 379, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-viola-116.html", "price": 24.90, "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": 24.90, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 116, "id_product_attribute": 379, "is_default": true, "sku": "819\/521", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-viola-116.html", "image": "https:\/\/cdn2.musiccraft-instruments.com\/1-large_default\/wittner-ultra-saitenhalter-viola.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "38,0 cm - 39,5 cm" } ], "attribute_summary": "Gr\u00f6\u00dfe: 38,0 cm - 39,5 cm", "price": { "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 20.92, "tax_included": 24.90, "without_reduction_tax_excluded": 20.92, "without_reduction_tax_included": 24.90, "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=116&id_product_attribute=379&qty=1&setCountry=1&setCurrency=1" } }, { "@type": "Offer", "id_product": 116, "id_product_attribute": 380, "is_default": false, "sku": "819\/520", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-ultra-saitenhalter-viola-116.html", "image": "https:\/\/cdn2.musiccraft-instruments.com\/1-large_default\/wittner-ultra-saitenhalter-viola.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "39,5 cm - 41,5 cm" } ], "attribute_summary": "Gr\u00f6\u00dfe: 39,5 cm - 41,5 cm", "price": { "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 20.92, "tax_included": 24.90, "without_reduction_tax_excluded": 20.92, "without_reduction_tax_included": 24.90, "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=116&id_product_attribute=380&qty=1&setCountry=1&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 379, "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 24.90, "price_tax_excluded": 20.92, "price_without_reduction": 20.92, "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": 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." } } } }