{
  "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": 116
    },
    "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=116&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=116&setCountry=0&setCurrency=1",
      "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=116&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\/wittner-ultra-tailpiece-viola-116.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\/wittner-ultra-tailpiece-viola-116.html#product",
      "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-ultra-tailpiece-viola-116.html",
      "urls": {
        "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=116&setCountry=0&setCurrency=1",
        "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=116&setCountry=0&setCurrency=1",
        "human": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-ultra-tailpiece-viola-116.html"
      },

      "id_product": 116,
      "name": "Wittner Ultra Tailpiece for Viola \u2013 Less Weight. More Control.",
      "description": "The Wittner Ultra tailpiece for viola combines lightweight modern construction with integrated fine tuners and is available in multiple viola sizes.",
      "full_description": "The viola already brings enough weight on its own. The rest of the setup should not add unnecessary strain.  The Wittner Ultra tailpiece for viola is designed to make the instrument feel lighter, more balanced and more comfortable to play. Its modern Hi-Tec construction reduces unnecessary weight while supporting open resonance and stable tuning.  Thanks to the integrated fine tuners, the setup stays clean and tuning adjustments remain precise and easy. Especially practical: the tailpiece is available for multiple viola sizes, making it suitable for smaller instruments as well as large concert violas.  Typical Wittner: technology stays in the background so the focus can stay on playing.   Built lighter. Built right.",
      "additional_text": "Wittner Ultra tailpiece for viola \n Available for multiple viola sizes \n Integrated fine tuners \n Lightweight Hi-Tec composite construction \n Supports open resonance and response \n Color: black \n Ideal for practice, stage and everyday use",

      "sku": "819\/520",
      "mpn": "819\/520",
      "ean13": "",
      "upc": "",

      "brand": {
        "@type": "Brand",
        "name": "Wittner \u2013 Division of GEWA music GmbH",
        "url": "https:\/\/musiccraft-instruments.com\/en\/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\/en\/wittner-division-of-gewa-music-gmbh_19"      },

      "supplier": {
        "@type": "Organization",
        "id_supplier": 1,
        "name": "Migma e.G."
      },

      "main_category": {
        "id_category": 77,
        "name": "Tailpiece",
        "link_rewrite": "tailpiece",
        "urls": {
          "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=77&setCountry=0&setCurrency=1",
          "human": "https:\/\/musiccraft-instruments.com\/en\/tailpiece-77"
        }
      },

      "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": 1,
            "name": "Product declaration",
            "value": "Utensils"
          },                    {
            "id_feature": 1,
            "id_feature_value": 150,
            "name": "Product declaration",
            "value": "Spare parts"
          },                    {
            "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": 328,
            "name": "Components",
            "value": "String holder"
          },                    {
            "id_feature": 29,
            "id_feature_value": 351,
            "name": "Size for",
            "value": "39,5 cm - 41,5 cm"
          },                    {
            "id_feature": 29,
            "id_feature_value": 352,
            "name": "Size for",
            "value": "38,0 cm - 39,5 cm"
          },                    {
            "id_feature": 2,
            "id_feature_value": 502,
            "name": "Badges",
            "value": "Different variants"
          },                    {
            "id_feature": 2,
            "id_feature_value": 350,
            "name": "Badges",
            "value": "High-tech composite material"
          }                        ],

      "agent_faqs": [
              ],

      "images": [
                            {
            "id_image": 2325,
            "cover": true,
            "position": 1,
            "legend": "Wittner Ultra Tailpiece for Viola \u2013 Less Weight. More Control.",
            "url": "https:\/\/cdn3.musiccraft-instruments.com\/2325-large_default\/wittner-ultra-tailpiece-viola.webp"
          }                        ],

            "shipping_weight": {
        "@type": "QuantitativeValue",
        "value": 0.2,
        "unitCode": "KGM",
        "note": "Shipping weight, not product content."
      },
      
      
      "variant_model": {
        "has_variants": true,
        "variant_count": 2,
        "default_id_product_attribute": 379
      },

      "offers": {
        "@type": "Offer",
        "offer_scope": "default_variant",
        "id_product": 116,
        "id_product_attribute": 379,
        "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-ultra-tailpiece-viola-116.html",
        "price": 24.90,
        "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": 24.90,
          "priceCurrency": "EUR",
          "valueAddedTaxIncluded": true        }
              },

      "variant_offers": [
                            {
            "@type": "Offer",
            "id_product": 116,
            "id_product_attribute": 379,
            "is_default": true,
            "sku": "819\/521",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-ultra-tailpiece-viola-116.html",
            "image": "https:\/\/cdn3.musiccraft-instruments.com\/1-large_default\/wittner-ultra-tailpiece-viola.webp",

                                                                                                                                                                                                                                                "attributes": [
                                              {
                  "group_id": 10,
                  "group_name": "Size",
                  "value": "38,0 cm - 39,5 cm"
                }                                          ],
            "attribute_summary": "Size: 38,0 cm - 39,5 cm",

            "price": {
              "delivery_country": false,
              "currency": "EUR",
              "currency_symbol": "\u20ac",
              "tax_rate": 19,
              "tax_excluded": 20.92,
              "tax_included": 24.90,
              "without_reduction_tax_excluded": 20.92,
              "without_reduction_tax_included": 24.90,
              "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=116&id_product_attribute=379&qty=1&setCountry=0&setCurrency=1"
            }
          },                    {
            "@type": "Offer",
            "id_product": 116,
            "id_product_attribute": 380,
            "is_default": false,
            "sku": "819\/520",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-ultra-tailpiece-viola-116.html",
            "image": "https:\/\/cdn3.musiccraft-instruments.com\/1-large_default\/wittner-ultra-tailpiece-viola.webp",

                                                                                                                                                                                                                                                "attributes": [
                                              {
                  "group_id": 10,
                  "group_name": "Size",
                  "value": "39,5 cm - 41,5 cm"
                }                                          ],
            "attribute_summary": "Size: 39,5 cm - 41,5 cm",

            "price": {
              "delivery_country": false,
              "currency": "EUR",
              "currency_symbol": "\u20ac",
              "tax_rate": 19,
              "tax_excluded": 20.92,
              "tax_included": 24.90,
              "without_reduction_tax_excluded": 20.92,
              "without_reduction_tax_included": 24.90,
              "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=116&id_product_attribute=380&qty=1&setCountry=0&setCurrency=1"
            }
          }                        ],

      "pricing": {
        "scope": "default_variant",
        "default_id_product_attribute": 379,
        "delivery_country": false,
        "currency": "EUR",
        "currency_symbol": "\u20ac",
        "tax_rate": 19,
        "use_taxes": true,
        "show_taxes": true,
        "price_tax_included": 24.90,
        "price_tax_excluded": 20.92,
        "price_without_reduction": 20.92,
        "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."
      }
    }
  }
}