{ "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": 271 }, "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=271&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=271&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=271&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\/migma-zither-tuning-key-offset-head-271.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\/migma-zither-tuning-key-offset-head-271.html#product", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/migma-zither-tuning-key-offset-head-271.html", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/product?id_product=271&setCountry=0&setCurrency=1", "contexts": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/contexts?resource=product&id_product=271&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/p\/migma-zither-tuning-key-offset-head-271.html" }, "id_product": 271, "name": "Migma Zither Tuning Key with Offset Head \u2013 Square or Star", "description": "Zither tuning key with offset head and European beech handle. Suitable for 5.5 mm tuning pins and available with square or star socket.", "full_description": "The Migma Zither Tuning Key is a practical tool for tuning zithers and is designed for tuning pins with a diameter of 5.5 mm. The offset head provides convenient handling when turning the tuning pins and supports controlled adjustment to the required pitch. The handle is made from European beech and provides comfortable handling while tuning the instrument. Depending on the type of tuning pins used, the key is available with either a square or star-shaped socket. The zither tuning key is made in Germany. The square version is supplied under article number 866\/113a, while the version with a star socket is available under article number 866\/113b.", "additional_text": "Tuning key for zithers \n For tuning pins: \u00d8 5.5 mm \n Handle: European beech \n Offset head \n Square version: Art. No. 866\/113a \n Star version: Art. No. 866\/113b \n Made in Germany \n Manufacturer: Migma e.G. \n Model: Zither Tuning Key", "sku": "866\/113", "mpn": "866\/113", "ean13": "", "upc": "", "brand": { "@type": "Brand", "name": "MIGMA eG", "url": "https:\/\/musiccraft-instruments.com\/en\/migma-eg_21" }, "manufacturer": { "@type": "Organization", "id_manufacturer": 21, "name": "MIGMA eG", "url": "https:\/\/musiccraft-instruments.com\/en\/migma-eg_21" }, "supplier": { "@type": "Organization", "id_supplier": 1, "name": "Migma e.G." }, "main_category": { "id_category": 73, "name": "Tuners", "link_rewrite": "tuners", "urls": { "agent": "https:\/\/musiccraft-instruments.com\/en\/mcc\/mcc_agent\/category?id_category=73&setCountry=0&setCurrency=1", "human": "https:\/\/musiccraft-instruments.com\/en\/tuners-73" } }, "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": 3, "name": "Product declaration", "value": "Single item" }, { "id_feature": 15, "id_feature_value": 130, "name": "Taxation", "value": "Standard Rate" }, { "id_feature": 9, "id_feature_value": 394, "name": "Instrument", "value": "zither" }, { "id_feature": 28, "id_feature_value": 329, "name": "Components", "value": "Fine tuners" }, { "id_feature": 28, "id_feature_value": 336, "name": "Components", "value": "Tune bars" }, { "id_feature": 22, "id_feature_value": 172, "name": "Intended Use", "value": "Intermediate" }, { "id_feature": 22, "id_feature_value": 171, "name": "Intended Use", "value": "Beginner" }, { "id_feature": 22, "id_feature_value": 173, "name": "Intended Use", "value": "Stage" }, { "id_feature": 2, "id_feature_value": 502, "name": "Badges", "value": "Different variants" }, { "id_feature": 18, "id_feature_value": 402, "name": "Core material", "value": "Whitebeech" } ], "agent_faqs": [ ], "images": [ { "id_image": 2672, "cover": true, "position": 1, "legend": "Migma Zither Tuning Key with Offset Head \u2013 Square or Star", "url": "https:\/\/cdn2.musiccraft-instruments.com\/2672-large_default\/migma-zither-tuning-key-offset-head.webp" }, { "id_image": 2673, "cover": false, "position": 2, "legend": "Migma Zither Tuning Key with Offset Head \u2013 Square or Star", "url": "https:\/\/cdn3.musiccraft-instruments.com\/2673-large_default\/migma-zither-tuning-key-offset-head.webp" } ], "variant_model": { "has_variants": true, "variant_count": 2, "default_id_product_attribute": 642 }, "offers": { "@type": "Offer", "offer_scope": "default_variant", "id_product": 271, "id_product_attribute": 642, "url": "https:\/\/musiccraft-instruments.com\/en\/p\/migma-zither-tuning-key-offset-head-271.html", "price": 16.20, "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": 16.20, "priceCurrency": "EUR", "valueAddedTaxIncluded": true } }, "variant_offers": [ { "@type": "Offer", "id_product": 271, "id_product_attribute": 642, "is_default": true, "sku": "866\/113b", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/migma-zither-tuning-key-offset-head-271.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/1-large_default\/migma-zither-tuning-key-offset-head.webp", "attributes": [ { "group_id": 22, "group_name": "Hole", "value": "Star" } ], "attribute_summary": "Hole: Star", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 13.61, "tax_included": 16.20, "without_reduction_tax_excluded": 13.61, "without_reduction_tax_included": 16.20, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 10, "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=271&id_product_attribute=642&qty=1&setCountry=0&setCurrency=1" } }, { "@type": "Offer", "id_product": 271, "id_product_attribute": 641, "is_default": false, "sku": " 866\/113a", "url": "https:\/\/musiccraft-instruments.com\/en\/p\/migma-zither-tuning-key-offset-head-271.html", "image": "https:\/\/cdn3.musiccraft-instruments.com\/1-large_default\/migma-zither-tuning-key-offset-head.webp", "attributes": [ { "group_id": 22, "group_name": "Hole", "value": "Square" } ], "attribute_summary": "Hole: Square", "price": { "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "tax_excluded": 11.43, "tax_included": 13.60, "without_reduction_tax_excluded": 11.43, "without_reduction_tax_included": 13.60, "value_added_tax_included": true }, "availability": "https://schema.org/InStock", "quantity": 10, "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=271&id_product_attribute=641&qty=1&setCountry=0&setCurrency=1" } } ], "pricing": { "scope": "default_variant", "default_id_product_attribute": 642, "delivery_country": false, "currency": "EUR", "currency_symbol": "\u20ac", "tax_rate": 19, "use_taxes": true, "show_taxes": true, "price_tax_included": 16.20, "price_tax_excluded": 13.61, "price_without_reduction": 13.61, "reduction_percent": 0, "reduction_price": 0 }, "availability": { "status": "https://schema.org/InStock", "orderable": true, "available_for_order": true, "show_price": true, "quantity": 20, "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." } } } }