{ "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": 1, "iso_code": "de", "url_prefix": "\/de\/" }, "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": 121 }, "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\/de\/mcc\/mcc_agent\/product?id_product=121&setCountry=0&setCurrency=1", "agent": { "root": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/root?setCountry=0&setCurrency=1", "sitemap": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/sitemap?setCountry=0&setCurrency=1", "search": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/search?setCountry=0&setCurrency=1", "cart": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/cart?setCountry=0&setCurrency=1", "product": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=121&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=121&setCountry=0&setCurrency=1" }, "human": { "home": "https:\/\/musiccraft-instruments.com\/", "sitemap": "https:\/\/musiccraft-instruments.com\/de\/sitemap", "search": "https:\/\/musiccraft-instruments.com\/de\/suche", "product": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-12-14-121.html", "cart": "https:\/\/musiccraft-instruments.com\/de\/bestellung", "contact": "https:\/\/musiccraft-instruments.com\/de\/kontaktiere-uns" } }, "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\/de\/p\/wittner-saitenfeinstimmer-violine-12-14-121.html#product", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-12-14-121.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/product?id_product=121&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/contexts?resource=product&id_product=121&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-12-14-121.html" }, "id_product": 121, "name": "Wittner Saitenfeinstimmer f\u00fcr Violine 1\/2\u20131\/4 \u2013 Kleine Gr\u00f6\u00dfe. Pr\u00e4zise Stimmung.", "description": "Der Wittner Saitenfeinstimmer f\u00fcr Violinen in 1\/2- und 1\/4-Gr\u00f6\u00dfe erm\u00f6glicht pr\u00e4zises und leichtg\u00e4ngiges Nachstimmen bei Sch\u00fcler- und Kinderinstrumenten.", "full_description": "Gerade kleinere Instrumente reagieren oft besonders sensibel auf Stimmung. Der Wittner Saitenfeinstimmer f\u00fcr Violinen in 1\/2- und 1\/4-Gr\u00f6\u00dfe wurde entwickelt, um feine Korrekturen sauber, kontrolliert und leichtg\u00e4ngig umzusetzen. Besonders im Unterricht oder bei jungen Musikern sorgt das f\u00fcr deutlich entspannteres Stimmen. Die pr\u00e4zise Mechanik erm\u00f6glicht exakte Einstellungen ohne unn\u00f6tigen Kraftaufwand. Gleichzeitig bleibt die Konstruktion leicht und zuverl\u00e4ssig, damit das Instrument ausgewogen spielbar bleibt. Erh\u00e4ltlich in vernickelter Oberfl\u00e4che f\u00fcgt sich der Feinstimmer optisch klassisch und unauff\u00e4llig in das Setup ein. Weil gutes Stimmen nicht vom Alter abh\u00e4ngt.", "additional_text": "Wittner Saitenfeinstimmer f\u00fcr Violine \n Geeignet f\u00fcr 1\/2- und 1\/4-Violinen \n Pr\u00e4zise und leichtg\u00e4ngige Mechanik \n Ideal f\u00fcr Sch\u00fcler- und Kinderinstrumente \n Vernickelte Oberfl\u00e4che \n Leichte und stabile Konstruktion \n Komfortables Nachstimmen im Alltag und Unterricht", "sku": "819\/076", "mpn": "819\/076", "ean13": "", "upc": "", "brand": { "@type": "Brand", "name": "Wittner \u2013 Division of GEWA music GmbH", "url": "https:\/\/musiccraft-instruments.com\/de\/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\/de\/wittner-division-of-gewa-music-gmbh_19" }, "supplier": { "@type": "Organization", "id_supplier": 1, "name": "Migma e.G." }, "main_category": { "id_category": 78, "name": "Feinstimmer", "link_rewrite": "feinstimmer", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=78&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/feinstimmer-78" } }, "categories": [ { "id_category": 4, "name": "Instrumente", "link_rewrite": "instrumente", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=4&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/instrumente-4" } }, { "id_category": 6, "name": "Equipment & Essentials", "link_rewrite": "equipment-essentials", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=6&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/equipment-essentials-6" } }, { "id_category": 7, "name": "Restauration", "link_rewrite": "restauration", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=7&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/restauration-7" } }, { "id_category": 5, "name": "Highlight", "link_rewrite": "highlight", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/de\/mcc\/mcc_agent\/category?id_category=5&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/de\/highlight-5" } } ], "features": [ { "id_feature": 1, "id_feature_value": 150, "name": "Produkttyp", "value": "Ersatzteile" }, { "id_feature": 1, "id_feature_value": 1, "name": "Produkttyp", "value": "Zubeh\u00f6r" }, { "id_feature": 15, "id_feature_value": 130, "name": "Besteuerung", "value": "Standard Rate" }, { "id_feature": 9, "id_feature_value": 148, "name": "Instrument", "value": "Violine" }, { "id_feature": 28, "id_feature_value": 329, "name": "Bestandteile", "value": "Feinstimmer" }, { "id_feature": 29, "id_feature_value": 357, "name": "Gr\u00f6\u00dfe f\u00fcr", "value": "1\/2 + 1\/4 Gr\u00f6\u00dfe" }, { "id_feature": 2, "id_feature_value": 502, "name": "Besonderheit", "value": "Verschiedene Varianten" } ], "agent_faqs": [ ], "images": [ { "id_image": 2338, "cover": true, "position": 1, "legend": "Wittner Saitenfeinstimmer f\u00fcr Violine 1\/2\u20131\/4 \u2013 Kleine Gr\u00f6\u00dfe. Pr\u00e4zise Stimmung.", "url": "https:\/\/cdn2.musiccraft-instruments.com\/2338-large_default\/wittner-saitenfeinstimmer-violine-12-14.webp" }, { "id_image": 2337, "cover": false, "position": 2, "legend": "Wittner Saitenfeinstimmer f\u00fcr Violine 1\/2\u20131\/4 \u2013 Kleine Gr\u00f6\u00dfe. Pr\u00e4zise Stimmung.", "url": "https:\/\/cdn3.musiccraft-instruments.com\/2337-large_default\/wittner-saitenfeinstimmer-violine-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": 392 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 121, "id_product_attribute": 392, "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-12-14-121.html", "price": 2.90, "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": 2.90, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 121, "id_product_attribute": 392, "is_default": true, "sku": "819\/076", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-12-14-121.html", "image": "https:\/\/cdn2.musiccraft-instruments.com\/2338-large_default\/wittner-saitenfeinstimmer-violine-12-14.webp", "attributes": [ { "group_id": 11, "group_name": "Oberfl\u00e4che", "value": "Vernickelt" } ], "attribute_summary": "Oberfl\u00e4che: Vernickelt", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 2.44, "tax_included": 2.90, "without_reduction_tax_excluded": 2.44, "without_reduction_tax_included": 2.90, "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\/de\/warenkorb?add=1&id_product=121&id_product_attribute=392&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 121, "id_product_attribute": 390, "is_default": false, "sku": "819\/077", "url": "https:\/\/musiccraft-instruments.com\/de\/p\/wittner-saitenfeinstimmer-violine-12-14-121.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/2337-large_default\/wittner-saitenfeinstimmer-violine-12-14.webp", "attributes": [ { "group_id": 11, "group_name": "Oberfl\u00e4che", "value": "Schwarz" } ], "attribute_summary": "Oberfl\u00e4che: Schwarz", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 2.44, "tax_included": 2.90, "without_reduction_tax_excluded": 2.44, "without_reduction_tax_included": 2.90, "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\/de\/warenkorb?add=1&id_product=121&id_product_attribute=390&qty=1&setCountry=0&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 392, "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 2.90, "price_tax_excluded": 2.44, "price_without_reduction": 2.44, "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." } } } }