{ "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": 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": 136 }, "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=136&setCountry=0&setCurrency=1", "agent": { "root": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/root?setCountry=0&setCurrency=1", "sitemap": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/sitemap?setCountry=0&setCurrency=1", "search": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/search?setCountry=0&setCurrency=1", "cart": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/cart?setCountry=0&setCurrency=1", "product": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=136&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=136&setCountry=0&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\/efrano-tailgut-cello-70168-136.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\/efrano-tailgut-cello-70168-136.html#product", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-cello-70168-136.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=136&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=136&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-cello-70168-136.html" }, "id_product": 136, "name": "Efrano Tailgut for Cello \u2013 Tradition Under Tension", "description": "The Efrano tailgut for cello combines traditional gut-style aesthetics with reliable stability for refined classical cello setups.", "full_description": "With cello, character often begins where modern technology intentionally steps back. The Efrano tailgut for cello embraces a traditional natural gut-style appearance and fits perfectly into classical, historical or carefully refined instrument setups. It securely connects the tailpiece to the instrument while supporting a visually balanced overall aesthetic. Especially on cello, strong tension forces act on the connection between tailpiece and instrument. That is why this tailgut combines authentic traditional appearance with stable and reliable everyday functionality. Suitable for multiple cello sizes, it works equally well on student and professional concert instruments and blends beautifully with classic wood aesthetics. Tradition is not only visible. You can feel it.", "additional_text": "Efrano tailgut for cello \n Color variants: natural, red, black \n Traditional natural gut-style appearance \n Reliable connection between tailpiece and instrument \n Suitable for multiple cello sizes \n Ideal for classical and historical setups \n High-quality craftsmanship", "sku": "70168", "mpn": "70168", "ean13": "", "upc": "", "brand": { "@type": "Brand", "name": "Efrano Musiksaiten", "url": "https:\/\/musiccraft-instruments.com\/en\/efrano-musiksaiten_20" }, "manufacturer": { "@type": "Organization", "id_manufacturer": 20, "name": "Efrano Musiksaiten", "url": "https:\/\/musiccraft-instruments.com\/en\/efrano-musiksaiten_20" }, "supplier": { "@type": "Organization", "id_supplier": 1, "name": "Migma e.G." }, "main_category": { "id_category": 79, "name": "Suspended stringers", "link_rewrite": "suspended-stringers", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=79&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/suspended-stringers-79" } }, "categories": [ { "id_category": 4, "name": "Instruments", "link_rewrite": "instruments", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=4&setCountry=0&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=0&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=0&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=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/highlight-5" } } ], "features": [ { "id_feature": 1, "id_feature_value": 150, "name": "Product declaration", "value": "Spare parts" }, { "id_feature": 1, "id_feature_value": 1, "name": "Product declaration", "value": "Utensils" }, { "id_feature": 15, "id_feature_value": 130, "name": "Taxation", "value": "Standard Rate" }, { "id_feature": 9, "id_feature_value": 325, "name": "Instrument", "value": "Cello" }, { "id_feature": 28, "id_feature_value": 330, "name": "Components", "value": "Hang-on strings" }, { "id_feature": 2, "id_feature_value": 502, "name": "Badges", "value": "Different variants" } ], "agent_faqs": [ ], "images": [ { "id_image": 2364, "cover": true, "position": 1, "legend": "Efrano Tailgut for Cello \u2013 Tradition Under Tension", "url": "https:\/\/cdn1.musiccraft-instruments.com\/2364-large_default\/efrano-tailgut-cello-70168.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": 420 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 136, "id_product_attribute": 420, "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-cello-70168-136.html", "price": 27.90, "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": 27.90, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 136, "id_product_attribute": 420, "is_default": true, "sku": "70168-N", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-cello-70168-136.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/1-large_default\/efrano-tailgut-cello-70168.webp", "attributes": [ { "group_id": 17, "group_name": "Color", "value": "Natural (Gut)" } ], "attribute_summary": "Color: Natural (Gut)", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 23.45, "tax_included": 27.90, "without_reduction_tax_excluded": 23.45, "without_reduction_tax_included": 27.90, "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\/en\/shopping-cart?add=1&id_product=136&id_product_attribute=420&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 136, "id_product_attribute": 418, "is_default": false, "sku": "70168-S", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-cello-70168-136.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/1-large_default\/efrano-tailgut-cello-70168.webp", "attributes": [ { "group_id": 17, "group_name": "Color", "value": "Black (Gut String)" } ], "attribute_summary": "Color: Black (Gut String)", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 23.45, "tax_included": 27.90, "without_reduction_tax_excluded": 23.45, "without_reduction_tax_included": 27.90, "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\/en\/shopping-cart?add=1&id_product=136&id_product_attribute=418&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 136, "id_product_attribute": 419, "is_default": false, "sku": "70168-R", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-cello-70168-136.html", "image": "https:\/\/cdn1.musiccraft-instruments.com\/1-large_default\/efrano-tailgut-cello-70168.webp", "attributes": [ { "group_id": 17, "group_name": "Color", "value": "Red (Gut String)" } ], "attribute_summary": "Color: Red (Gut String)", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 23.45, "tax_included": 27.90, "without_reduction_tax_excluded": 23.45, "without_reduction_tax_included": 27.90, "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\/en\/shopping-cart?add=1&id_product=136&id_product_attribute=419&qty=1&setCountry=0&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 420, "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 27.90, "price_tax_excluded": 23.45, "price_without_reduction": 23.45, "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." } } } }