{ "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": 2, "iso_code": "en", "url_prefix": "\/en\/" }, "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": 34 }, "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\/en\/mcc\/mcc_agent\/product?id_product=34&setCountry=1&setCurrency=1", "agent": { "root": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/root?setCountry=1&setCurrency=1", "sitemap": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/sitemap?setCountry=1&setCurrency=1", "search": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/search?setCountry=1&setCurrency=1", "cart": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/cart?setCountry=1&setCurrency=1", "product": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=34&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=34&setCountry=1&setCurrency=1" }, "human": { "home": "https:\/\/musiccraft-instruments.com\/", "sitemap": "https:\/\/musiccraft-instruments.com\/en\/sitemap", "search": "https:\/\/musiccraft-instruments.com\/en\/search", "product": "https:\/\/musiccraft-instruments.com\/en\/p\/optima-silver-classics-set-34-5762-cm-classical-guitar-strings-34.html", "cart": "https:\/\/musiccraft-instruments.com\/en\/order", "contact": "https:\/\/musiccraft-instruments.com\/en\/contact-us" } }, "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\/en\/p\/optima-silver-classics-set-34-5762-cm-classical-guitar-strings-34.html#product", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/optima-silver-classics-set-34-5762-cm-classical-guitar-strings-34.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=34&setCountry=1&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=34&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/p\/optima-silver-classics-set-34-5762-cm-classical-guitar-strings-34.html" }, "id_product": 34, "name": "OPTIMA Silver Classics Set 3\/4 (57\u201362 cm) \u2013 Classical Guitar Strings", "description": "Classical guitar strings designed for 3\/4 size guitars with full tone and long-lasting performance. The OPTIMA Silver Classics set offers balanced tension and clear response \u2013 perfect for smaller instruments without compromising sound.", "full_description": "A smaller guitar doesn\u2019t mean a smaller sound. The OPTIMA Silver Classics 3\/4 set is built for shorter scale instruments \u2013 without cutting corners. Each string is precisely designed for 3\/4 guitars (57\u201362 cm). No compromises. No shortcuts. The result: A balanced, clear tone that feels just right. Clear nylon trebles provide clean response and definition. Silver-wound basses add depth and stability. Everything works together. The medium tension offers the right balance: Comfortable for beginners. Stable enough for controlled playing. Thanks to the coating, the strings last longer and stay consistent. Less changing. More playing. First chords or serious practice \u2013 these strings take you seriously. From the start. \n Mensur \n \n 3\/4: Mensur 57-62 cm \n 1\/2: Mensur 51-56 cm \n 1\/4: Mensur 45-50 cm \n 1\/8: Mensur 39-44 cm", "additional_text": "Individual strings in this set \n \n SILVER CLASSICS E1 3\/4 (57-62 cm) \n SILVER CLASSICS B2 3\/4 (57-62 cm) \n SILVER CLASSICS G3 3\/4 (57-62 cm) \n SILVER CLASSICS D4 3\/4 (57-62 cm) \n SILVER CLASSICS A5 3\/4 (57-62 cm) \n SILVER CLASSICS E6 3\/4 (57-62 cm)", "sku": "862\/270.3\/4", "mpn": "862\/270.3\/4", "ean13": "", "upc": "", "brand": { "@type": "Brand", "name": "OPTIMA Musiksaiten GmbH", "url": "https:\/\/musiccraft-instruments.com\/en\/optima-musiksaiten-gmbh_10" }, "manufacturer": { "@type": "Organization", "id_manufacturer": 10, "name": "OPTIMA Musiksaiten GmbH", "url": "https:\/\/musiccraft-instruments.com\/en\/optima-musiksaiten-gmbh_10" }, "supplier": { "@type": "Organization", "id_supplier": 1, "name": "Migma e.G." }, "main_category": { "id_category": 45, "name": "Saiten", "link_rewrite": "saiten", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=45&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/saiten-45" } }, "categories": [ { "id_category": 4, "name": "Instruments", "link_rewrite": "instruments", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=4&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/instruments-4" } }, { "id_category": 6, "name": "Equipment & Essentials", "link_rewrite": "equipment-essentials", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=6&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/equipment-essentials-6" } }, { "id_category": 7, "name": "Restoration", "link_rewrite": "restoration", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=7&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/restoration-7" } }, { "id_category": 5, "name": "Highlight", "link_rewrite": "highlight", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=5&setCountry=1&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/highlight-5" } } ], "features": [ { "id_feature": 1, "id_feature_value": 1, "name": "Product declaration", "value": "Utensils" }, { "id_feature": 1, "id_feature_value": 169, "name": "Product declaration", "value": "Set" }, { "id_feature": 1, "id_feature_value": 151, "name": "Product declaration", "value": "Consumables" }, { "id_feature": 15, "id_feature_value": 130, "name": "Taxation", "value": "Standard Rate" }, { "id_feature": 9, "id_feature_value": 44, "name": "Instrument", "value": "Guitar" }, { "id_feature": 18, "id_feature_value": 177, "name": "Core material", "value": "Special Multifilament" }, { "id_feature": 18, "id_feature_value": 157, "name": "Core material", "value": "Nylon" }, { "id_feature": 19, "id_feature_value": 160, "name": "Wrapping \/ Material", "value": "Silver" }, { "id_feature": 20, "id_feature_value": 176, "name": "Fastening", "value": "Blank" }, { "id_feature": 21, "id_feature_value": 167, "name": "String gauge", "value": "Medium" }, { "id_feature": 23, "id_feature_value": 182, "name": "String", "value": "A5" }, { "id_feature": 23, "id_feature_value": 179, "name": "String", "value": "B2 (H)" }, { "id_feature": 23, "id_feature_value": 181, "name": "String", "value": "D4" }, { "id_feature": 23, "id_feature_value": 183, "name": "String", "value": "E6" }, { "id_feature": 23, "id_feature_value": 178, "name": "String", "value": "E1" }, { "id_feature": 23, "id_feature_value": 180, "name": "String", "value": "G3" } ], "agent_faqs": [ ], "images": [ { "id_image": 1983, "cover": true, "position": 1, "legend": "OPTIMA Silver Classics Set 3\/4 (57\u201362 cm) \u2013 Classical Guitar Strings", "url": "https:\/\/cdn2.musiccraft-instruments.com\/1983-large_default\/optima-silver-classics-set-34-5762-cm-classical-guitar-strings.webp" }, { "id_image": 1982, "cover": false, "position": 2, "legend": "OPTIMA Silver Classics Set 3\/4 (57\u201362 cm) \u2013 Classical Guitar Strings", "url": "https:\/\/cdn2.musiccraft-instruments.com\/1982-large_default\/optima-silver-classics-set-34-5762-cm-classical-guitar-strings.webp" } ], "shipping_weight": { "@type": "QuantitativeValue", "value": 0.07, "unitCode": "KGM", "note": "Shipping weight, not product content." }, "variant_model": { "has_variants": false, "variant_count": 0, "default_id_product_attribute": 0 }, "offers": { "@type": "Offer", "offer_scope": "product", "id_product": 34, "id_product_attribute": 0, "url": "https:\/\/musiccraft-instruments.com\/en\/p\/optima-silver-classics-set-34-5762-cm-classical-guitar-strings-34.html", "price": 14.90, "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": 14.90, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } , "action": { "type": "add_to_cart", "method": "GET", "enabled": true, "quantity": 1, "url": "https:\/\/musiccraft-instruments.com\/en\/shopping-cart?add=1&id_product=34&qty=1&setCountry=1&setCurrency=1" } }, "variant_offers": [ ], "pricing": { "scope": "product", "default_id_product_attribute": 0, "delivery_country": "DE", "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 14.90, "price_tax_excluded": 12.52, "price_without_reduction": 12.52, "reduction_percent": 0, "reduction_price": 0 }, "availability": { "status": "https://schema.org/InStock", "orderable": true, "available_for_order": true, "show_price": true, "quantity": 20, "minimal_quantity": 1, "variant_stock_available": false, "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." } } } }