{ "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": 128 }, "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=128&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=128&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=128&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-einhaengesaite-cello-128.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-einhaengesaite-cello-128.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-einhaengesaite-cello-128.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=128&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=128&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-einhaengesaite-cello-128.html" }, "id_product": 128, "name": "Wittner Einh\u00e4ngesaite f\u00fcr Cello \u2013 Kleine Verbindung. Gro\u00dfe Wirkung.", "description": "Die Wittner Einh\u00e4ngesaite f\u00fcr Cello sorgt f\u00fcr eine stabile und zuverl\u00e4ssige Verbindung zwischen Saitenhalter und Instrument.", "full_description": "Man sieht sie kaum. Aber ohne sie l\u00e4uft am Instrument ziemlich wenig zusammen. Die Wittner Einh\u00e4ngesaite f\u00fcr Cello verbindet den Saitenhalter sicher mit dem Instrument und sorgt f\u00fcr Stabilit\u00e4t, zuverl\u00e4ssige Spannung und ein ausgewogenes Spielgef\u00fchl. Gerade beim Cello wirken enorme Kr\u00e4fte auf das Setup \u2014 umso wichtiger ist eine sauber verarbeitete und belastbare L\u00f6sung. Die Einh\u00e4ngesaite unterst\u00fctzt eine stabile Position des Saitenhalters und tr\u00e4gt damit indirekt auch zu Ansprache und Schwingungsverhalten des Instruments bei. Typisch Wittner steht dabei zuverl\u00e4ssige Funktion im Mittelpunkt \u2014 unauff\u00e4llig, aber entscheidend. Erh\u00e4ltlich f\u00fcr verschiedene Cello-Gr\u00f6\u00dfen eignet sich die Einh\u00e4ngesaite sowohl f\u00fcr Sch\u00fcler- als auch Konzertinstrumente. Unsichtbar wichtig. Wie viele gute Teile am Instrument.", "additional_text": "Wittner Einh\u00e4ngesaite f\u00fcr Cello \n Geeignet f\u00fcr verschiedene Cello-Gr\u00f6\u00dfen \n Stabile Verbindung zwischen Saitenhalter und Instrument \n Hohe Belastbarkeit und zuverl\u00e4ssiger Halt \n Unterst\u00fctzt ausgewogenes Schwingungsverhalten \n Hochwertige Verarbeitung \n Ideal f\u00fcr Reparatur, Austausch und Setup-Optimierung", "sku": "819\/060", "mpn": "819\/060", "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": 79, "name": "Einh\u00e4ngesaiten", "link_rewrite": "einhaengesaiten", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=79&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/einhaengesaiten-79" } }, "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": 325, "name": "Instrument", "value": "Cello" }, { "id_feature": 28, "id_feature_value": 330, "name": "Bestandteile", "value": "Einh\u00e4ngesaiten" }, { "id_feature": 29, "id_feature_value": 353, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "4\/4 + 7\/8 Gr\u00f6\u00dfe" }, { "id_feature": 29, "id_feature_value": 355, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "1\/4 + 1\/8 Gr\u00f6\u00dfe" }, { "id_feature": 29, "id_feature_value": 354, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "1\/2 + 3\/4 Gr\u00f6\u00dfe" }, { "id_feature": 2, "id_feature_value": 502, "name": "Besonderheit", "value": "Verschiedene Varianten" } ], "agent_faqs": [ ], "images": [ { "id_image": 2356, "cover": true, "position": 1, "legend": "Wittner Einh\u00e4ngesaite f\u00fcr Cello \u2013 Kleine Verbindung. Gro\u00dfe Wirkung.", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2356-large_default\/wittner-einhaengesaite-cello.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": 406 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 128, "id_product_attribute": 406, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-einhaengesaite-cello-128.html", "price": 5.49, "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": 5.49, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 128, "id_product_attribute": 406, "is_default": true, "sku": "819\/061", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-einhaengesaite-cello-128.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/1-large_default\/wittner-einhaengesaite-cello.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "1\/2 + 3\/4 Gr\u00f6\u00dfe" } ], "attribute_summary": "Gr\u00f6\u00dfe: 1\/2 + 3\/4 Gr\u00f6\u00dfe", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 4.61, "tax_included": 5.49, "without_reduction_tax_excluded": 4.61, "without_reduction_tax_included": 5.49, "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=128&id_product_attribute=406&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 128, "id_product_attribute": 407, "is_default": false, "sku": "819\/062", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-einhaengesaite-cello-128.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/1-large_default\/wittner-einhaengesaite-cello.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "1\/4 + 1\/8 Gr\u00f6\u00dfe" } ], "attribute_summary": "Gr\u00f6\u00dfe: 1\/4 + 1\/8 Gr\u00f6\u00dfe", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 4.61, "tax_included": 5.49, "without_reduction_tax_excluded": 4.61, "without_reduction_tax_included": 5.49, "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=128&id_product_attribute=407&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 128, "id_product_attribute": 408, "is_default": false, "sku": "819\/060", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-einhaengesaite-cello-128.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/1-large_default\/wittner-einhaengesaite-cello.webp", "attributes": [ { "group_id": 10, "group_name": "Gr\u00f6\u00dfe", "value": "4\/4 + 7\/8 Gr\u00f6\u00dfe" } ], "attribute_summary": "Gr\u00f6\u00dfe: 4\/4 + 7\/8 Gr\u00f6\u00dfe", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 4.61, "tax_included": 5.49, "without_reduction_tax_excluded": 4.61, "without_reduction_tax_included": 5.49, "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=128&id_product_attribute=408&qty=1&setCountry=0&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 406, "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 5.49, "price_tax_excluded": 4.61, "price_without_reduction": 4.61, "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." } } } }