{ "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": 123 }, "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=123&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=123&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=123&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-viola-darmsaiten-123.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-darmsaiten-123.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-darmsaiten-123.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=123&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=123&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-darmsaiten-123.html" }, "id_product": 123, "name": "Wittner Saitenfeinstimmer f\u00fcr Viola-Darmsaiten \u2013 Feine Kontrolle mit Gef\u00fchl", "description": "Der Wittner Saitenfeinstimmer f\u00fcr Viola-Darmsaiten wurde speziell f\u00fcr sensible Saitenspannungen und pr\u00e4zises Nachstimmen entwickelt.", "full_description": "Darmsaiten reagieren anders. Direkter. Sensibler. Manchmal auch etwas eigensinniger. Der Wittner Saitenfeinstimmer f\u00fcr Viola-Darmsaiten wurde genau f\u00fcr diese besonderen Anforderungen entwickelt. Die fein abgestimmte Mechanik erm\u00f6glicht pr\u00e4zise Korrekturen, ohne unn\u00f6tige Spannung auf die Saite zu bringen. Gerade bei klassischen oder traditionellen Viola-Setups ist kontrolliertes Nachstimmen entscheidend f\u00fcr Spielgef\u00fchl und Klangstabilit\u00e4t. Die leichte und stabile Konstruktion unterst\u00fctzt dabei ein ausgewogenes Instrumentengef\u00fchl, ohne unn\u00f6tig Gewicht hinzuzuf\u00fcgen. Typisch Wittner steht auch hier nicht die Technik im Mittelpunkt \u2014 sondern die Sicherheit, dass das Instrument sauber reagiert, wenn es darauf ankommt. Feinmechanik f\u00fcr Musiker, die feine Unterschiede h\u00f6ren.", "additional_text": "Wittner Saitenfeinstimmer f\u00fcr Viola \n Speziell f\u00fcr Darmsaiten entwickelt \n Pr\u00e4zise und leichtg\u00e4ngige Mechanik \n Kontrolliertes und sensibles Nachstimmen \n Leichte und stabile Konstruktion \n Ideal f\u00fcr klassische und traditionelle Setups \n Hochwertige Verarbeitung", "sku": "819\/078D", "mpn": "819\/078D", "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": 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": 2341, "cover": true, "position": 1, "legend": "Wittner Saitenfeinstimmer f\u00fcr Viola-Darmsaiten \u2013 Feine Kontrolle mit Gef\u00fchl", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2341-large_default\/wittner-saitenfeinstimmer-viola-darmsaiten.webp" }, { "id_image": 2342, "cover": false, "position": 2, "legend": "Wittner Saitenfeinstimmer f\u00fcr Viola-Darmsaiten \u2013 Feine Kontrolle mit Gef\u00fchl", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2342-large_default\/wittner-saitenfeinstimmer-viola-darmsaiten.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": 396 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 123, "id_product_attribute": 396, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-darmsaiten-123.html", "price": 4.69, "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": 4.69, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 123, "id_product_attribute": 396, "is_default": true, "sku": "819\/078D", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-darmsaiten-123.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/2341-large_default\/wittner-saitenfeinstimmer-viola-darmsaiten.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": 3.94, "tax_included": 4.69, "without_reduction_tax_excluded": 3.94, "without_reduction_tax_included": 4.69, "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=123&id_product_attribute=396&qty=1&setCountry=1&setCurrency=1" } }, { "@type": "Offer", "id_product": 123, "id_product_attribute": 395, "is_default": false, "sku": "819\/079D", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-viola-darmsaiten-123.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/2342-large_default\/wittner-saitenfeinstimmer-viola-darmsaiten.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": 3.94, "tax_included": 4.69, "without_reduction_tax_excluded": 3.94, "without_reduction_tax_included": 4.69, "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=123&id_product_attribute=395&qty=1&setCountry=1&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 396, "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 4.69, "price_tax_excluded": 3.94, "price_without_reduction": 3.94, "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." } } } }