{ "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": 119 }, "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=119&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=119&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=119&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-violine-44-34-119.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-violine-44-34-119.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-44-34-119.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=119&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=119&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-44-34-119.html" }, "id_product": 119, "name": "Wittner Saitenfeinstimmer f\u00fcr Violine 4\/4\u20133\/4 \u2013 Pr\u00e4zision ohne Drama", "description": "Der Wittner Saitenfeinstimmer f\u00fcr Violine in 4\/4\u20133\/4 Gr\u00f6\u00dfe erm\u00f6glicht pr\u00e4zises und komfortables Nachstimmen mit zuverl\u00e4ssiger Mechanik und geringem Gewicht.", "full_description": "Manchmal entscheidet eine Vierteldrehung dar\u00fcber, ob es sauber klingt oder nicht. Der Wittner Saitenfeinstimmer f\u00fcr Violine wurde entwickelt, um genau diese feinen Korrekturen kontrolliert und zuverl\u00e4ssig m\u00f6glich zu machen. Besonders bei Violinen in 4\/4- und 3\/4-Gr\u00f6\u00dfe sorgt die pr\u00e4zise Mechanik f\u00fcr komfortables Nachstimmen ohne unn\u00f6tigen Kraftaufwand. Die leichte Konstruktion unterst\u00fctzt ein ausgewogenes Setup und f\u00fcgt sich unauff\u00e4llig in das Instrument ein. Kein \u00fcberfl\u00fcssiger Schnickschnack \u2014 einfach pr\u00e4zise Funktion, wenn sie gebraucht wird. Typisch Wittner: klein im Bauteil, gro\u00df im Unterschied. Fein stimmen. Ohne feinf\u00fchlig die Nerven zu verlieren.", "additional_text": "Wittner Saitenfeinstimmer f\u00fcr Violine \n Geeignet f\u00fcr 4\/4- und 3\/4-Violinen \n Pr\u00e4zise und leichtg\u00e4ngige Mechanik \n Komfortables Nachstimmen \n Leichte Konstruktion \n Hochwertige Verarbeitung \n Ideal f\u00fcr Unterricht, B\u00fchne und Alltag", "sku": "819\/070", "mpn": "819\/070", "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": 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": 148, "name": "Instrument", "value": "Violine" }, { "id_feature": 28, "id_feature_value": 329, "name": "Bestandteile", "value": "Feinstimmer" }, { "id_feature": 29, "id_feature_value": 356, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "4\/4 + 3\/4 Gr\u00f6\u00dfe" }, { "id_feature": 2, "id_feature_value": 502, "name": "Besonderheit", "value": "Verschiedene Varianten" } ], "agent_faqs": [ ], "images": [ { "id_image": 2328, "cover": true, "position": 1, "legend": "Wittner Saitenfeinstimmer f\u00fcr Violine 4\/4\u20133\/4 \u2013 Pr\u00e4zision ohne Drama", "url": "https:\/\/cdn3.musiccraft-instruments.com\/2328-large_default\/wittner-saitenfeinstimmer-violine-44-34.webp" }, { "id_image": 2329, "cover": false, "position": 2, "legend": "Wittner Saitenfeinstimmer f\u00fcr Violine 4\/4\u20133\/4 \u2013 Pr\u00e4zision ohne Drama", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2329-large_default\/wittner-saitenfeinstimmer-violine-44-34.webp" }, { "id_image": 2330, "cover": false, "position": 3, "legend": "Wittner Saitenfeinstimmer f\u00fcr Violine 4\/4\u20133\/4 \u2013 Pr\u00e4zision ohne Drama", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2330-large_default\/wittner-saitenfeinstimmer-violine-44-34.webp" } ], "shipping_weight": { "@type": "QuantitativeValue", "value": 0.05, "unitCode": "KGM", "note": "Shipping weight, not product content." }, "variant_model": { "has_variants": true, "variant_count": 3, "default_id_product_attribute": 384 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 119, "id_product_attribute": 384, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-44-34-119.html", "price": 3.09, "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": 3.09, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 119, "id_product_attribute": 384, "is_default": true, "sku": "819\/070", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-44-34-119.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/2328-large_default\/wittner-saitenfeinstimmer-violine-44-34.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": 2.60, "tax_included": 3.09, "without_reduction_tax_excluded": 2.60, "without_reduction_tax_included": 3.09, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 10, "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=119&id_product_attribute=384&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 119, "id_product_attribute": 385, "is_default": false, "sku": "819\/071", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-44-34-119.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/2329-large_default\/wittner-saitenfeinstimmer-violine-44-34.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": 2.60, "tax_included": 3.09, "without_reduction_tax_excluded": 2.60, "without_reduction_tax_included": 3.09, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 10, "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=119&id_product_attribute=385&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 119, "id_product_attribute": 386, "is_default": false, "sku": "819\/072", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-44-34-119.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/2330-large_default\/wittner-saitenfeinstimmer-violine-44-34.webp", "attributes": [ { "group_id": 11, "group_name": "Oberfl\u00e4che", "value": "Schwarz mit vergoldeter Schraube" } ], "attribute_summary": "Oberfl\u00e4che: Schwarz mit vergoldeter Schraube", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 3.52, "tax_included": 4.19, "without_reduction_tax_excluded": 3.52, "without_reduction_tax_included": 4.19, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 10, "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=119&id_product_attribute=386&qty=1&setCountry=0&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 384, "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 3.09, "price_tax_excluded": 2.60, "price_without_reduction": 2.60, "reduction_percent": 0, "reduction_price": 0 }, "availability": { "status": "https://schema.org/InStock", "orderable": true, "available_for_order": true, "show_price": true, "quantity": 30, "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." } } } }