{
  "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": 127
    },
    "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=127&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=127&setCountry=0&setCurrency=1",
      "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=127&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-english-model-44-34-127.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-english-model-44-34-127.html#product",
      "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-english-model-44-34-127.html",
      "urls": {
        "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=127&setCountry=0&setCurrency=1",
        "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=127&setCountry=0&setCurrency=1",
        "human": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-english-model-44-34-127.html"
      },

      "id_product": 127,
      "name": "Wittner Fine Tuner English Model \u2013 Classic Precision for 4\/4\u20133\/4 Violins",
      "description": "The Wittner English model fine tuner for 4\/4 and 3\/4 violins combines traditional design with precise and smooth mechanics.",
      "full_description": "Some constructions survive because they simply work.  The Wittner English model fine tuner for 4\/4 and 3\/4 violins follows a classic design philosophy with reliable mechanics and controlled fine tuning. Especially musicians who prefer traditional setups appreciate its timeless appearance and direct handling.  The precise mechanism allows smooth adjustments without unnecessary effort while supporting stable tuning during practice, lessons or performances. At the same time, the lightweight construction blends naturally into the instrument setup.  Typical Wittner: technology should not demand attention. It should simply work.   Classic design. Modern precision.",
      "additional_text": "Wittner English model fine tuner \n Suitable for 4\/4 and 3\/4 violins \n Classic construction style \n Precise and smooth mechanism \n Comfortable fine tuning \n Lightweight and stable construction \n Ideal for traditional and modern setups",

      "sku": "819\/073",
      "mpn": "819\/073",
      "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": 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": 148,
            "name": "Instrument",
            "value": "Violin"
          },                    {
            "id_feature": 28,
            "id_feature_value": 329,
            "name": "Components",
            "value": "Fine tuners"
          },                    {
            "id_feature": 29,
            "id_feature_value": 356,
            "name": "Size for",
            "value": "4\/4 + 3\/4 Size"
          },                    {
            "id_feature": 2,
            "id_feature_value": 502,
            "name": "Badges",
            "value": "Different variants"
          }                        ],

      "agent_faqs": [
              ],

      "images": [
                            {
            "id_image": 2355,
            "cover": true,
            "position": 1,
            "legend": "Wittner Fine Tuner English Model \u2013 Classic Precision for 4\/4\u20133\/4 Violins",
            "url": "https:\/\/cdn3.musiccraft-instruments.com\/2355-large_default\/wittner-fine-tuner-english-model-44-34.webp"
          },                    {
            "id_image": 2354,
            "cover": false,
            "position": 2,
            "legend": "Wittner Fine Tuner English Model \u2013 Classic Precision for 4\/4\u20133\/4 Violins",
            "url": "https:\/\/cdn1.musiccraft-instruments.com\/2354-large_default\/wittner-fine-tuner-english-model-44-34.webp"
          },                    {
            "id_image": 2353,
            "cover": false,
            "position": 3,
            "legend": "Wittner Fine Tuner English Model \u2013 Classic Precision for 4\/4\u20133\/4 Violins",
            "url": "https:\/\/cdn2.musiccraft-instruments.com\/2353-large_default\/wittner-fine-tuner-english-model-44-34.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": 405
      },

      "offers": {
        "@type": "Offer",
        "offer_scope": "default_variant",
        "id_product": 127,
        "id_product_attribute": 405,
        "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-english-model-44-34-127.html",
        "price": 5.29,
        "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": 5.29,
          "priceCurrency": "EUR",
          "valueAddedTaxIncluded": true        }
              },

      "variant_offers": [
                            {
            "@type": "Offer",
            "id_product": 127,
            "id_product_attribute": 405,
            "is_default": true,
            "sku": "819\/073",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-english-model-44-34-127.html",
            "image": "https:\/\/cdn3.musiccraft-instruments.com\/2355-large_default\/wittner-fine-tuner-english-model-44-34.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": 4.45,
              "tax_included": 5.29,
              "without_reduction_tax_excluded": 4.45,
              "without_reduction_tax_included": 5.29,
              "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=127&id_product_attribute=405&qty=1&setCountry=0&setCurrency=1"
            }
          },                    {
            "@type": "Offer",
            "id_product": 127,
            "id_product_attribute": 403,
            "is_default": false,
            "sku": "819\/074",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-english-model-44-34-127.html",
            "image": "https:\/\/cdn1.musiccraft-instruments.com\/2354-large_default\/wittner-fine-tuner-english-model-44-34.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": 4.45,
              "tax_included": 5.29,
              "without_reduction_tax_excluded": 4.45,
              "without_reduction_tax_included": 5.29,
              "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=127&id_product_attribute=403&qty=1&setCountry=0&setCurrency=1"
            }
          },                    {
            "@type": "Offer",
            "id_product": 127,
            "id_product_attribute": 404,
            "is_default": false,
            "sku": "819\/075",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-english-model-44-34-127.html",
            "image": "https:\/\/cdn2.musiccraft-instruments.com\/2353-large_default\/wittner-fine-tuner-english-model-44-34.webp",

                                                                                                                                                                                                                                                "attributes": [
                                              {
                  "group_id": 11,
                  "group_name": "Surface",
                  "value": "Black with a gold-plated screw"
                }                                          ],
            "attribute_summary": "Surface: Black with a gold-plated screw",

            "price": {
              "delivery_country": false,
              "currency": "EUR",
              "currency_symbol": "\u20ac",
              "tax_rate": 19,
              "tax_excluded": 5.37,
              "tax_included": 6.39,
              "without_reduction_tax_excluded": 5.37,
              "without_reduction_tax_included": 6.39,
              "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=127&id_product_attribute=404&qty=1&setCountry=0&setCurrency=1"
            }
          }                        ],

      "pricing": {
        "scope": "default_variant",
        "default_id_product_attribute": 405,
        "delivery_country": false,
        "currency": "EUR",
        "currency_symbol": "\u20ac",
        "tax_rate": 19,
        "use_taxes": true,
        "show_taxes": true,
        "price_tax_included": 5.29,
        "price_tax_excluded": 4.45,
        "price_without_reduction": 4.45,
        "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."
      }
    }
  }
}