{
  "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": 122
    },
    "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=122&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=122&setCountry=0&setCurrency=1",
      "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=122&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-fine-tuner-viola-122.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-fine-tuner-viola-122.html#product",
      "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-viola-122.html",
      "urls": {
        "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=122&setCountry=0&setCurrency=1",
        "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=122&setCountry=0&setCurrency=1",
        "human": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-viola-122.html"
      },

      "id_product": 122,
      "name": "Wittner Fine Tuner for Viola \u2013 Precision for Bigger Sound",
      "description": "The Wittner fine tuner for viola offers precise and controlled tuning adjustments with smooth mechanics and reliable stability.",
      "full_description": "The viola is not very forgiving when it comes to tuning. But good hardware makes the process much easier.  The Wittner fine tuner for viola is designed to deliver smooth and controlled fine adjustments. Especially with viola strings, which often require more tension and control, the precise mechanism ensures comfortable and reliable tuning.  The stable yet lightweight construction supports a balanced setup without adding unnecessary weight to the instrument. Whether in lessons, orchestra rehearsals or on stage \u2014 a reliable fine tuner saves time, frustration and constant readjustment.  Typical Wittner: the technology stays in the background while everything simply works as it should.   Fine control for powerful sound.",
      "additional_text": "Wittner fine tuner for viola \n Precise and smooth mechanism \n Ideal for controlled fine tuning \n Stable and lightweight construction \n Supports balanced playing feel \n High-quality craftsmanship \n Suitable for lessons, orchestra and stage use",

      "sku": "819\/078",
      "mpn": "819\/078",
      "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": 78,
        "name": "Fine tuner",
        "link_rewrite": "fine-tuner",
        "urls": {
          "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=78&setCountry=0&setCurrency=1",
          "human": "https:\/\/musiccraft-instruments.com\/en\/fine-tuner-78"
        }
      },

      "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": 329,
            "name": "Components",
            "value": "Fine tuners"
          },                    {
            "id_feature": 2,
            "id_feature_value": 502,
            "name": "Badges",
            "value": "Different variants"
          }                        ],

      "agent_faqs": [
              ],

      "images": [
                            {
            "id_image": 2339,
            "cover": true,
            "position": 1,
            "legend": "Wittner Fine Tuner for Viola \u2013 Precision for Bigger Sound",
            "url": "https:\/\/cdn1.musiccraft-instruments.com\/2339-large_default\/wittner-fine-tuner-viola.webp"
          },                    {
            "id_image": 2340,
            "cover": false,
            "position": 2,
            "legend": "Wittner Fine Tuner for Viola \u2013 Precision for Bigger Sound",
            "url": "https:\/\/cdn1.musiccraft-instruments.com\/2340-large_default\/wittner-fine-tuner-viola.webp"
          }                        ],

            "shipping_weight": {
        "@type": "QuantitativeValue",
        "value": 0.05,
        "unitCode": "KGM",
        "note": "Shipping weight, not product content."
      },
      
      
      "variant_model": {
        "has_variants": true,
        "variant_count": 2,
        "default_id_product_attribute": 394
      },

      "offers": {
        "@type": "Offer",
        "offer_scope": "default_variant",
        "id_product": 122,
        "id_product_attribute": 394,
        "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-viola-122.html",
        "price": 3.90,
        "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": 3.90,
          "priceCurrency": "EUR",
          "valueAddedTaxIncluded": true        }
              },

      "variant_offers": [
                            {
            "@type": "Offer",
            "id_product": 122,
            "id_product_attribute": 394,
            "is_default": true,
            "sku": "819\/078",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-viola-122.html",
            "image": "https:\/\/cdn1.musiccraft-instruments.com\/2339-large_default\/wittner-fine-tuner-viola.webp",

                                                                                                                                                                                                                                                "attributes": [
                                              {
                  "group_id": 11,
                  "group_name": "Surface",
                  "value": "Nickel-plated"
                }                                          ],
            "attribute_summary": "Surface: Nickel-plated",

            "price": {
              "delivery_country": false,
              "currency": "EUR",
              "currency_symbol": "\u20ac",
              "tax_rate": 19,
              "tax_excluded": 3.28,
              "tax_included": 3.90,
              "without_reduction_tax_excluded": 3.28,
              "without_reduction_tax_included": 3.90,
              "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=122&id_product_attribute=394&qty=1&setCountry=0&setCurrency=1"
            }
          },                    {
            "@type": "Offer",
            "id_product": 122,
            "id_product_attribute": 393,
            "is_default": false,
            "sku": "819\/079",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-viola-122.html",
            "image": "https:\/\/cdn1.musiccraft-instruments.com\/2340-large_default\/wittner-fine-tuner-viola.webp",

                                                                                                                                                                                                                                                "attributes": [
                                              {
                  "group_id": 11,
                  "group_name": "Surface",
                  "value": "Black"
                }                                          ],
            "attribute_summary": "Surface: Black",

            "price": {
              "delivery_country": false,
              "currency": "EUR",
              "currency_symbol": "\u20ac",
              "tax_rate": 19,
              "tax_excluded": 3.28,
              "tax_included": 3.90,
              "without_reduction_tax_excluded": 3.28,
              "without_reduction_tax_included": 3.90,
              "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=122&id_product_attribute=393&qty=1&setCountry=0&setCurrency=1"
            }
          }                        ],

      "pricing": {
        "scope": "default_variant",
        "default_id_product_attribute": 394,
        "delivery_country": false,
        "currency": "EUR",
        "currency_symbol": "\u20ac",
        "tax_rate": 19,
        "use_taxes": true,
        "show_taxes": true,
        "price_tax_included": 3.90,
        "price_tax_excluded": 3.28,
        "price_without_reduction": 3.28,
        "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."
      }
    }
  }
}