{ "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": 0, "iso_code": false }, "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": 122 }, "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=122&setCountry=0&setCurrency=1", "agent": { "root": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/root?setCountry=0&setCurrency=1", "sitemap": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/sitemap?setCountry=0&setCurrency=1", "search": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/search?setCountry=0&setCurrency=1", "cart": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/cart?setCountry=0&setCurrency=1", "product": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=122&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=122&setCountry=0&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-saitenfeinstimmer-viola-122.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-saitenfeinstimmer-viola-122.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-122.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=122&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=122&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-122.html" }, "id_product": 122, "name": "Wittner Saitenfeinstimmer f\u00fcr Viola \u2013 Pr\u00e4zision f\u00fcr gr\u00f6\u00dfere Klangwelten", "description": "Der Wittner Saitenfeinstimmer f\u00fcr Viola erm\u00f6glicht pr\u00e4zises und kontrolliertes Nachstimmen mit leichtg\u00e4ngiger Mechanik und zuverl\u00e4ssiger Stabilit\u00e4t.", "full_description": "Die Viola verzeiht wenig bei der Stimmung. Aber gute Technik macht es deutlich einfacher. Der Wittner Saitenfeinstimmer f\u00fcr Viola wurde entwickelt, um feine Korrekturen sauber und kontrolliert umzusetzen. Gerade bei Viola-Saiten, die oft etwas mehr Spannung und Kraft verlangen, sorgt die pr\u00e4zise Mechanik f\u00fcr angenehmes und zuverl\u00e4ssiges Stimmen. Die stabile und gleichzeitig leichte Konstruktion unterst\u00fctzt ein ausgewogenes Setup, ohne das Instrument unn\u00f6tig zu belasten. Ob im Unterricht, im Orchester oder auf der B\u00fchne \u2014 ein sauber arbeitender Feinstimmer spart Zeit, Nerven und unn\u00f6tige Nachjustierungen. Typisch Wittner steht dabei nicht die Technik im Vordergrund. Sondern das gute Gef\u00fchl, dass einfach alles funktioniert. Feine Kontrolle f\u00fcr gro\u00dfe T\u00f6ne.", "additional_text": "Wittner Saitenfeinstimmer f\u00fcr Viola \n Pr\u00e4zise und leichtg\u00e4ngige Mechanik \n Ideal f\u00fcr kontrolliertes Nachstimmen \n Stabile und leichte Konstruktion \n Unterst\u00fctzt ausgewogenes Spielgef\u00fchl \n Hochwertige Verarbeitung \n Geeignet f\u00fcr Unterricht, B\u00fchne und Orchester", "sku": "819\/078", "mpn": "819\/078", "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": 78, "name": "Feinstimmer", "link_rewrite": "feinstimmer", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=78&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/feinstimmer-78" } }, "categories": [ { "id_category": 4, "name": "Instrumente", "link_rewrite": "instrumente", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=4&setCountry=0&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=0&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=0&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=0&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": 149, "name": "Instrument", "value": "Viola" }, { "id_feature": 28, "id_feature_value": 329, "name": "Bestandteile", "value": "Feinstimmer" }, { "id_feature": 2, "id_feature_value": 502, "name": "Besonderheit", "value": "Verschiedene Varianten" } ], "agent_faqs": [ ], "images": [ { "id_image": 2339, "cover": true, "position": 1, "legend": "Wittner Saitenfeinstimmer f\u00fcr Viola \u2013 Pr\u00e4zision f\u00fcr gr\u00f6\u00dfere Klangwelten", "url": "https:\/\/cdn3.musiccraft-instruments.com\/2339-large_default\/wittner-saitenfeinstimmer-viola.webp" }, { "id_image": 2340, "cover": false, "position": 2, "legend": "Wittner Saitenfeinstimmer f\u00fcr Viola \u2013 Pr\u00e4zision f\u00fcr gr\u00f6\u00dfere Klangwelten", "url": "https:\/\/cdn3.musiccraft-instruments.com\/2340-large_default\/wittner-saitenfeinstimmer-viola.webp" } ], "shipping_weight": { "@type": "QuantitativeValue", "value": 0.05, "unitCode": "KGM", "note": "Shipping weight, not product content." }, "variant_model": { "has_variants": true, "variant_count": 2, "default_id_product_attribute": 394 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 122, "id_product_attribute": 394, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-122.html", "price": 3.90, "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": 3.90, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 122, "id_product_attribute": 394, "is_default": true, "sku": "819\/078", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-122.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/2339-large_default\/wittner-saitenfeinstimmer-viola.webp", "attributes": [ { "group_id": 11, "group_name": "Oberfl\u00e4che", "value": "Vernickelt" } ], "attribute_summary": "Oberfl\u00e4che: Vernickelt", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 3.28, "tax_included": 3.90, "without_reduction_tax_excluded": 3.28, "without_reduction_tax_included": 3.90, "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=122&id_product_attribute=394&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 122, "id_product_attribute": 393, "is_default": false, "sku": "819\/079", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-122.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/2340-large_default\/wittner-saitenfeinstimmer-viola.webp", "attributes": [ { "group_id": 11, "group_name": "Oberfl\u00e4che", "value": "Schwarz" } ], "attribute_summary": "Oberfl\u00e4che: Schwarz", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 3.28, "tax_included": 3.90, "without_reduction_tax_excluded": 3.28, "without_reduction_tax_included": 3.90, "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=122&id_product_attribute=393&qty=1&setCountry=0&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 394, "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 3.90, "price_tax_excluded": 3.28, "price_without_reduction": 3.28, "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." } } } }