{ "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": 120 }, "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=120&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=120&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=120&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-saitenfeinstimmer-darmsaiten-44-34-120.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-darmsaiten-44-34-120.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-darmsaiten-44-34-120.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=120&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=120&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-darmsaiten-44-34-120.html" }, "id_product": 120, "name": "Wittner Saitenfeinstimmer f\u00fcr Darmsaiten \u2013 Feine Kontrolle f\u00fcr 4\/4\u20133\/4 Violinen", "description": "Der Wittner Saitenfeinstimmer f\u00fcr Violinen in 4\/4\u20133\/4 Gr\u00f6\u00dfe wurde speziell f\u00fcr Darmsaiten entwickelt und erm\u00f6glicht pr\u00e4zises, kontrolliertes Nachstimmen.", "full_description": "Darmsaiten haben Charakter. Und manchmal auch ihren eigenen Kopf. Genau deshalb braucht es einen Feinstimmer, der pr\u00e4zise arbeitet und gleichzeitig sensibel genug f\u00fcr das besondere Spielgef\u00fchl von Darmsaiten bleibt. Der Wittner Saitenfeinstimmer f\u00fcr 4\/4- und 3\/4-Violinen wurde speziell f\u00fcr diese Anforderungen entwickelt. Die fein abgestimmte Mechanik erm\u00f6glicht kontrollierte Korrekturen ohne unn\u00f6tige Spannung auf der Saite. Besonders bei klassischen Setups und traditionellen Klangkonzepten macht ein sauber arbeitender Feinstimmer einen sp\u00fcrbaren Unterschied. Leicht, zuverl\u00e4ssig und typisch Wittner: technisch pr\u00e4zise, ohne sich in den Vordergrund zu dr\u00e4ngen. F\u00fcr alle, die Stimmung nicht dem Zufall \u00fcberlassen.", "additional_text": "Wittner Saitenfeinstimmer f\u00fcr Darmsaiten \n Geeignet f\u00fcr 4\/4- und 3\/4-Violinen \n Speziell f\u00fcr Darmsaiten entwickelt \n Pr\u00e4zise und leichtg\u00e4ngige Mechanik \n Kontrolliertes Nachstimmen \n Leichte und stabile Konstruktion \n Ideal f\u00fcr klassische und traditionelle Setups", "sku": "819\/070D", "mpn": "819\/070D", "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=1&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=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": 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": 2334, "cover": true, "position": 1, "legend": "Saitenfeinstimmer Violine 4\/4 + 3\/4 Gr\u00f6\u00dfe f\u00fcr Darmsaiten", "url": "https:\/\/cdn3.musiccraft-instruments.com\/2334-large_default\/wittner-saitenfeinstimmer-darmsaiten-44-34.webp" }, { "id_image": 2336, "cover": false, "position": 2, "legend": "Saitenfeinstimmer Violine 4\/4 + 3\/4 Gr\u00f6\u00dfe f\u00fcr Darmsaiten", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2336-large_default\/wittner-saitenfeinstimmer-darmsaiten-44-34.webp" }, { "id_image": 2335, "cover": false, "position": 3, "legend": "Saitenfeinstimmer Violine 4\/4 + 3\/4 Gr\u00f6\u00dfe f\u00fcr Darmsaiten", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2335-large_default\/wittner-saitenfeinstimmer-darmsaiten-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": 389 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 120, "id_product_attribute": 389, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-darmsaiten-44-34-120.html", "price": 3.79, "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": 3.79, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 120, "id_product_attribute": 389, "is_default": true, "sku": "819\/070D", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-darmsaiten-44-34-120.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/2334-large_default\/wittner-saitenfeinstimmer-darmsaiten-44-34.webp", "attributes": [ { "group_id": 11, "group_name": "Oberfl\u00e4che", "value": "Vernickelt" } ], "attribute_summary": "Oberfl\u00e4che: Vernickelt", "price": { "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 3.18, "tax_included": 3.79, "without_reduction_tax_excluded": 3.18, "without_reduction_tax_included": 3.79, "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=120&id_product_attribute=389&qty=1&setCountry=1&setCurrency=1" } }, { "@type": "Offer", "id_product": 120, "id_product_attribute": 387, "is_default": false, "sku": "819\/071D", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-darmsaiten-44-34-120.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/2336-large_default\/wittner-saitenfeinstimmer-darmsaiten-44-34.webp", "attributes": [ { "group_id": 11, "group_name": "Oberfl\u00e4che", "value": "Schwarz" } ], "attribute_summary": "Oberfl\u00e4che: Schwarz", "price": { "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 3.18, "tax_included": 3.79, "without_reduction_tax_excluded": 3.18, "without_reduction_tax_included": 3.79, "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=120&id_product_attribute=387&qty=1&setCountry=1&setCurrency=1" } }, { "@type": "Offer", "id_product": 120, "id_product_attribute": 388, "is_default": false, "sku": "819\/072D", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-darmsaiten-44-34-120.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/2335-large_default\/wittner-saitenfeinstimmer-darmsaiten-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": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 4.03, "tax_included": 4.79, "without_reduction_tax_excluded": 4.03, "without_reduction_tax_included": 4.79, "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=120&id_product_attribute=388&qty=1&setCountry=1&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 389, "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 3.79, "price_tax_excluded": 3.18, "price_without_reduction": 3.18, "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." } } } }