{ "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": 135 }, "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=135&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=135&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=135&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-viola-70166-135.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-viola-70166-135.html#product", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-viola-70166-135.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=135&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=135&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-viola-70166-135.html" }, "id_product": 135, "name": "Efrano Tailgut for Viola \u2013 Tradition for Bigger Sound", "description": "The Efrano tailgut for viola combines traditional material aesthetics with reliable stability for classical instrument setups.", "full_description": "The viola is built on character. And sometimes that starts with the smallest details. The Efrano tailgut for viola intentionally embraces a traditional gut-style appearance and blends naturally into classical or historically inspired instrument setups. It securely connects the tailpiece to the instrument while supporting a balanced overall aesthetic. Especially on viola, where sound, appearance and playing feel are closely connected, carefully matched fittings make a noticeable difference. The natural gut-style look adds warmth and authentic visual character. Suitable for multiple viola sizes, this tailgut works equally well on student and professional concert instruments. Tradition is not old. Just timelessly good.", "additional_text": "Efrano tailgut for viola \n Article number: 70166 \n Traditional natural gut-style appearance \n Reliable connection between tailpiece and instrument \n Suitable for multiple viola sizes \n Ideal for classical and historical setups \n High-quality craftsmanship", "sku": "70166", "mpn": "70166", "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": 149, "name": "Instrument", "value": "Viola" }, { "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": 2363, "cover": true, "position": 1, "legend": "Efrano Tailgut for Viola \u2013 Tradition for Bigger Sound", "url": "https:\/\/cdn3.musiccraft-instruments.com\/2363-large_default\/efrano-tailgut-viola-70166.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": 417 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 135, "id_product_attribute": 417, "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-viola-70166-135.html", "price": 19.90, "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": 19.90, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 135, "id_product_attribute": 417, "is_default": true, "sku": "70166-N", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-viola-70166-135.html", "image": "https:\/\/cdn2.musiccraft-instruments.com\/1-large_default\/efrano-tailgut-viola-70166.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": 16.72, "tax_included": 19.90, "without_reduction_tax_excluded": 16.72, "without_reduction_tax_included": 19.90, "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\/en\/shopping-cart?add=1&id_product=135&id_product_attribute=417&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 135, "id_product_attribute": 415, "is_default": false, "sku": "70166-S", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-viola-70166-135.html", "image": "https:\/\/cdn2.musiccraft-instruments.com\/1-large_default\/efrano-tailgut-viola-70166.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": 16.72, "tax_included": 19.90, "without_reduction_tax_excluded": 16.72, "without_reduction_tax_included": 19.90, "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\/en\/shopping-cart?add=1&id_product=135&id_product_attribute=415&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 135, "id_product_attribute": 416, "is_default": false, "sku": "70166-R", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/efrano-tailgut-viola-70166-135.html", "image": "https:\/\/cdn2.musiccraft-instruments.com\/1-large_default\/efrano-tailgut-viola-70166.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": 16.72, "tax_included": 19.90, "without_reduction_tax_excluded": 16.72, "without_reduction_tax_included": 19.90, "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\/en\/shopping-cart?add=1&id_product=135&id_product_attribute=416&qty=1&setCountry=0&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 417, "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 19.90, "price_tax_excluded": 16.72, "price_without_reduction": 16.72, "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." } } } }