Hi @Fanis Tharropoulos, sharing the example below - For curl, (This doesn't have group by clause)

curl --location '<https://xyz/collections/variantV2/documents/search?query_by=productTitle%2Chandle%2CnormalisedTags%2CcategoryName%2CsubCategory%2CbrandName%2CproductType%2Csize%2Ccolor%2Cshade%2Cvolume&q=Summer%20edit&per_page=50&page=1&group_by=visualOptionId&sortBy=popularity%3Adesc>' \
--header 'X-TYPESENSE-API-KEY: xyz'

Response -

{
    "facet_counts": [],
    "found": 93,
    "hits": [
        {
            "curated": true,
            "document": {
                "available": true,
                "brandId": "67ff8656fcd4b11401a0522f",
                "brandName": "Anasi",
                "categoryId": "670014c073fb1b5ab9355639",
                "categoryName": "Fashion",
                "compareAtPrice": 0.0,
                "description": "<p><strong>Product Description </strong></p>\n<p>Introducing our Kai Midi Dress In a majestic shade of magenta pink. Adorned with a mesmerizing Ikat print, this dress captures the essence of bohemian charm. The cross-knot detailing in the front adds a contemporary twist, accentuating your curves.</p>\n<p>Ikkat Print.</p>\n<p>Colour - Magenta pink</p>\n<p>Washing Instructions - Dry Clean</p>",
                "externalProductId": "7948593660098",
                "externalVariantId": "44554104930498",
                "featuredImage": "<https://cdn.shopify.com/s/files/1/0567/1111/9042/files/KEW1550copy.jpg?v=1748352362>",
                "handle": "kai-maxi-dress",
                "id": "68137a57d3ca5a65e684470c-68137a57d3ca5a65e6844770",
                "images": [
                    "<https://cdn.shopify.com/s/files/1/0567/1111/9042/files/KEW1550copy.jpg?v=1716304104>",
                    "<https://cdn.shopify.com/s/files/1/0567/1111/9042/files/KEW1585copy.jpg?v=1716304097>",
                    "<https://cdn.shopify.com/s/files/1/0567/1111/9042/files/KEW1545copy.jpg?v=1716304097>"
                ],
                "normalisationConfidence": 0.85,
                "normalisedTags": {
                    "Gender": [
                        "Women"
                    ],
                    "Neckline": [
                        "V Neck"
                    ],
                    "Print Type": [
                        "Printed"
                    ],
                    "Style Type": [
                        "Casual",
                        "Beach wear"
                    ]
                },
                "options": {
                    "size": "XXXL"
                },
                "price": 3500.0,
                "productId": "68137a57d3ca5a65e684470c",
                "productTitle": "Kai Midi Dress",
                "productType": "Midi Dress",
                "publishedAt": "2024-05-21T20:38:36+05:30",
                "publishedAtEpoch": 1749292201029,
                "shopifyProductId": 7948593660098,
                "shopifyVariantId": 44554104930498,
                "size": "XXXL",
                "sku": "ANS-DR-004-XXXL",
                "subCategory": "Dresses",
                "tags": [
                    "__label:Best Seller",
                    "Bestsellers",
                    "collection-ss24"
                ],
                "title": "XXXL",
                "updatedAt": "2025-06-07T10:30:01.029494212",
                "updatedAtEpoch": 1749292201029,
                "variantId": "68137a57d3ca5a65e6844770",
                "vendor": "Anasiclothing",
                "visualOptionId": "7948593660098-X"
            },
            "highlight": {},
            "highlights": []
        },
        {
            "curated": true,
            "document": {
                "available": true,
                "brandId": "67ff8656fcd4b11401a0522f",
                "brandName": "Anasi",
                "categoryId": "670014c073fb1b5ab9355639",
                "categoryName": "Fashion",
                "compareAtPrice": 0.0,
                "description": "<p><strong>Product Description </strong></p>\n<p>Introducing our Elle Co-ord Set, The blouse features intricate micro handmade pleats, enhancing the rich Ikat print, while the multi-layered skirt adds a playful, feminine touch. Adorned with delicate lacy detailing on the edges, this set in vibrant magenta exudes sophistication. </p>\n<p>Top with Maxi Skirt.</p>\n<p>Ikat Print</p>\n<p>Colour - Magenta</p>\n<p>Washing Instructions - Dry Clean</p>",
                "externalProductId": "7948597231810",
                "externalVariantId": "44554123280578",
                "featuredImage": "<https://cdn.shopify.com/s/files/1/0567/1111/9042/files/KEW1718copy.jpg?v=1748352271>",
                "handle": "elle-co-ord-set-ikat-print",
                "id": "68137a57d3ca5a65e684471f-68137a57d3ca5a65e68448d0",
                "images": [
                    "<https://cdn.shopify.com/s/files/1/0567/1111/9042/files/KEW1718copy.jpg?v=1715943106>",
                    "<https://cdn.shopify.com/s/files/1/0567/1111/9042/files/KEW1731copy.jpg?v=1715943106>"
                ],
                "normalisationConfidence": 0.9,
                "normalisedTags": {
                    "Gender": [
                        "Women"
                    ],
                    "Material/Fabric": [
                        "Cotton"
                    ],
                    "Print Type": [
                        "Printed"
                    ],
                    "Style Type": [
                        "Festive",
                        "Traditional"
                    ]
                },
                "options": {
                    "size": "XXXL",
                    "style": "Skirts"
                },
                "price": 3300.0,
                "productId": "68137a57d3ca5a65e684471f",
                "productTitle": "Elle Co-ord Set",
                "productType": "Skirt Sets",
                "publishedAt": "2024-05-17T23:13:25+05:30",
                "publishedAtEpoch": 1749292232446,
                "shopifyProductId": 7948597231810,
                "shopifyVariantId": 44554123280578,
                "size": "XXXL",
                "sku": "ANS-CRDST-011",
                "subCategory": "Co-ords",
                "tags": [
                    "__label:Best Seller",
                    "Bestsellers",
                    "collection-ss24"
                ],
                "title": "XXXL / Skirts",
                "updatedAt": "2025-06-07T10:30:32.446657889",
                "updatedAtEpoch": 1749292232446,
                "variantId": "68137a57d3ca5a65e68448d0",
                "vendor": "Anasiclothing",
                "visualOptionId": "7948597231810-skirts"
            },
            "highlight": {},
            "highlights": []
        },
    "out_of": 175332,
    "page": 1,
    "request_params": {
        "collection_name": "variantV2",
        "first_q": "Summer edit",
        "per_page": 50,
        "q": "Summer edit"
    },
    "search_cutoff": false,
    "search_time_ms": 42
}

For curl, (This has group by clause)

curl --location '<https://xyz/collections/variantV2/documents/search?query_by=productTitle%2Chandle%2CnormalisedTags%2CcategoryName%2CsubCategory%2CbrandName%2CproductType%2Csize%2Ccolor%2Cshade%2Cvolume&q=Summer%20edit&per_page=50&page=1&group_by=visualOptionId&sortBy=popularity%3Adesc>' \
--header 'X-TYPESENSE-API-KEY: xyz'

Response - Sharing below