{
  "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": 1,
      "iso_code": "DE"
    },
    "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": 126
    },
    "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=126&setCountry=1&setCurrency=1",
    "agent": {
      "root": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/root?setCountry=1&setCurrency=1",
      "sitemap": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/sitemap?setCountry=1&setCurrency=1",
      "search": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/search?setCountry=1&setCurrency=1",
      "cart": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/cart?setCountry=1&setCurrency=1",
      "product": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=126&setCountry=1&setCurrency=1",
      "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=126&setCountry=1&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-gut-strings-12-14-126.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-gut-strings-12-14-126.html#product",
      "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-gut-strings-12-14-126.html",
      "urls": {
        "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=126&setCountry=1&setCurrency=1",
        "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=126&setCountry=1&setCurrency=1",
        "human": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-gut-strings-12-14-126.html"
      },

      "id_product": 126,
      "name": "Wittner Fine Tuner for Gut Strings 1\/2\u20131\/4 \u2013 Precision for Smaller Violins",
      "description": "The Wittner fine tuner for 1\/2 and 1\/4 violins is specially designed for gut strings and allows sensitive, controlled tuning adjustments.",
      "full_description": "Smaller violins often react especially directly to even the smallest tuning changes.  The Wittner fine tuner for gut strings in 1\/2 and 1\/4 sizes is designed to make precise adjustments smooth and controlled \u2014 without placing unnecessary pressure on sensitive gut strings.  The refined mechanism provides smooth tuning and comfortable handling, especially during lessons or for younger musicians. At the same time, the construction remains lightweight and stable to preserve a balanced playing feel.  Typical Wittner: small hardware, noticeable difference in everyday playing.   Precise tuning starts with the small details.",
      "additional_text": "Wittner fine tuner for gut strings \n Suitable for 1\/2 and 1\/4 violins \n Specially designed for gut strings \n Precise and smooth mechanism \n Controlled fine tuning \n Lightweight and stable construction \n Ideal for lessons and classical setups",

      "sku": "819\/076D",
      "mpn": "819\/076D",
      "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=1&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=1&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=1&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=1&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=1&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": 357,
            "name": "Size for",
            "value": "1\/2 + 1\/4 Size"
          },                    {
            "id_feature": 2,
            "id_feature_value": 502,
            "name": "Badges",
            "value": "Different variants"
          }                        ],

      "agent_faqs": [
              ],

      "images": [
                            {
            "id_image": 2352,
            "cover": true,
            "position": 1,
            "legend": "Wittner Fine Tuner for Gut Strings 1\/2\u20131\/4 \u2013 Precision for Smaller Violins",
            "url": "https:\/\/cdn2.musiccraft-instruments.com\/2352-large_default\/wittner-fine-tuner-gut-strings-12-14.webp"
          },                    {
            "id_image": 2351,
            "cover": false,
            "position": 2,
            "legend": "Wittner Fine Tuner for Gut Strings 1\/2\u20131\/4 \u2013 Precision for Smaller Violins",
            "url": "https:\/\/cdn3.musiccraft-instruments.com\/2351-large_default\/wittner-fine-tuner-gut-strings-12-14.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": 402
      },

      "offers": {
        "@type": "Offer",
        "offer_scope": "default_variant",
        "id_product": 126,
        "id_product_attribute": 402,
        "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-gut-strings-12-14-126.html",
        "price": 3.69,
        "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": 3.69,
          "priceCurrency": "EUR",
          "valueAddedTaxIncluded": true        }
              },

      "variant_offers": [
                            {
            "@type": "Offer",
            "id_product": 126,
            "id_product_attribute": 402,
            "is_default": true,
            "sku": "819\/076D",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-gut-strings-12-14-126.html",
            "image": "https:\/\/cdn2.musiccraft-instruments.com\/2352-large_default\/wittner-fine-tuner-gut-strings-12-14.webp",

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

            "price": {
              "delivery_country": "DE",
              "currency": "EUR",
              "currency_symbol": "\u20ac",
              "tax_rate": 19,
              "tax_excluded": 3.10,
              "tax_included": 3.69,
              "without_reduction_tax_excluded": 3.10,
              "without_reduction_tax_included": 3.69,
              "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=126&id_product_attribute=402&qty=1&setCountry=1&setCurrency=1"
            }
          },                    {
            "@type": "Offer",
            "id_product": 126,
            "id_product_attribute": 401,
            "is_default": false,
            "sku": "819\/077D",
            "url": "https:\/\/musiccraft-instruments.com\/en\/p\/wittner-fine-tuner-gut-strings-12-14-126.html",
            "image": "https:\/\/cdn3.musiccraft-instruments.com\/2351-large_default\/wittner-fine-tuner-gut-strings-12-14.webp",

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

            "price": {
              "delivery_country": "DE",
              "currency": "EUR",
              "currency_symbol": "\u20ac",
              "tax_rate": 19,
              "tax_excluded": 3.10,
              "tax_included": 3.69,
              "without_reduction_tax_excluded": 3.10,
              "without_reduction_tax_included": 3.69,
              "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=126&id_product_attribute=401&qty=1&setCountry=1&setCurrency=1"
            }
          }                        ],

      "pricing": {
        "scope": "default_variant",
        "default_id_product_attribute": 402,
        "delivery_country": "DE",
        "currency": "EUR",
        "currency_symbol": "\u20ac",
        "tax_rate": 19,
        "use_taxes": true,
        "show_taxes": true,
        "price_tax_included": 3.69,
        "price_tax_excluded": 3.10,
        "price_without_reduction": 3.10,
        "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."
      }
    }
  }
}