Working with Captures - Extralt Docs

A capture is a single extracted data record. Each run produces one capture per successfully extracted URL, containing structured ecommerce product data.

Browsing captures

• Dashboard

Navigate to Extract > Captures to view your extracted data.

Captures page showing filter bar and data table

Use the filter dropdown to choose how to view captures:

By run name: select a specific run to see its captures.
By robot name: select a robot to see captures across all of its runs. An additional Run Name column appears so you can tell which run produced each capture.

The table displays Image, Brand, Title, Price, Available, Variants, URL, and Extracted At for each capture.

Click any row to open a detail panel with two tabs:

Product — an interactive product page view showing images, options, pricing, description, and more.
Raw Data — the full JSON extraction data with syntax highlighting.

Capture detail panel showing product view with images, options, and pricing

• API

List captures from a specific run:

export EXTRALT_API_KEY="your-api-key"

curl -s "https://api.extralt.com/captures?runId=$RUN_ID" \
  -H "Authorization: Bearer $EXTRALT_API_KEY" | jq

When a run produces many captures, API results are paginated. See Common Patterns for pagination handling.

Extraction data schema

Every capture contains structured product data. The same schema is used across all sites.

{
    "id": "019d3ec3-cf96-7520-bc31-1474206e06ed",
    "url": "https://www.nike.com/t/dna-mens-dri-fit-basketball-shorts-hVGm16/HV1878-350",
    "extracted_at": 1774874512106,
    "product_id": "HV1878-350",
    "handle": "dna-mens-dri-fit-basketball-shorts-hVGm16",
    "group_id": "hVGm16",
    "title": "Nike DNA",
    "subtitle": "Men's Dri-FIT Basketball Shorts",
    "brand": "Nike",
    "breadcrumbs": "Men > Basketball > Shorts",
    "description": "Built for the court, ready for anywhere. These lightweight-yet-durable basketball shorts help keep you cool with our sweat-wicking Dri-FIT technology.",
    "release_date": "2025-10-02T07:00:00.000Z",
    "gender": "MEN",
    "age_group": "Adult",
    "rating_average": null,
    "rating_count": 0,
    "rating_scale": 5,
    "min_price": 41.97,
    "max_price": 41.97,
    "currency": "USD",
    "is_available": true,
    "variant_count": 7,
    "image_url": "https://static.nike.com/a/images/t_default/326dc2d4-a16d-4433-93d7-8d6f8313d4d0/M+NK+DF+DNA+8IN+SHORT+AOP.png",
    "categories": [
        "Men",
        "Basketball",
        "Shorts"
    ],
    "tags": [
        "Basketball",
        "Dri-FIT",
        "Shorts",
        "Men"
    ],
    "images": [
        {
            "url": "https://static.nike.com/a/images/t_default/326dc2d4-a16d-4433-93d7-8d6f8313d4d0/M+NK+DF+DNA+8IN+SHORT+AOP.png",
            "position": 1,
            "variant_ids": [
                "HV1878-350"
            ]
        },
        {
            "url": "https://static.nike.com/a/images/t_default/e2c6c1aa-6d12-46b9-9385-d76bd4fa30e0/M+NK+DF+DNA+8IN+SHORT+AOP.png",
            "position": 3,
            "variant_ids": [
                "HV1878-350"
            ]
        },
        {
            "url": "https://static.nike.com/a/images/t_default/38d8c21c-c8dd-466b-949c-92fdfcd0320b/M+NK+DF+DNA+8IN+SHORT+AOP.png",
            "position": 4,
            "variant_ids": [
                "HV1878-350"
            ]
        },
        {
            "url": "https://static.nike.com/a/images/t_default/79d907aa-1763-4af7-a1bf-99f5fc30acc4/M+NK+DF+DNA+8IN+SHORT+AOP.png",
            "position": 5,
            "variant_ids": [
                "HV1878-350"
            ]
        },
        {
            "url": "https://static.nike.com/a/images/t_default/1cd3d1a3-fea9-4295-bf8a-f3d6d59f2d47/M+NK+DF+DNA+8IN+SHORT+AOP.png",
            "position": 6,
            "variant_ids": [
                "HV1878-350"
            ]
        },
        {
            "url": "https://static.nike.com/a/images/t_default/3cf19355-4f26-4faf-b658-581297b87e9c/M+NK+DF+DNA+8IN+SHORT+AOP.png",
            "position": 7,
            "variant_ids": [
                "HV1878-350"
            ]
        }
    ],
    "videos": null,
    "properties_dict": {
        "Style": "HV1878-350",
        "Shown": "Chlorophyll/Black"
    },
    "properties_list": [
        "Recycled Materials",
        "Designed for Basketball",
        "Unlined",
        "Lightweight, sweat-wicking fabric with mesh and smooth interior",
        "Side pockets and zippered utility pocket large enough for a phone",
        "Elastic waistband with drawcord",
        "Body: 100% polyester. Pocket bags: 100% polyester.",
        "Machine wash",
        "Imported",
        "Shown: Chlorophyll/Black",
        "Style: HV1878-350"
    ],
    "options": {
        "opt1": {
            "name": "Color",
            "values": [
                "Chlorophyll/Black"
            ]
        },
        "opt2": {
            "name": "Size",
            "values": [
                "S",
                "M",
                "L",
                "XL",
                "2XL",
                "3XL",
                "4XL"
            ]
        },
        "opt3": null
    },
    "variants": [
        {
            "id": "90c9f2c2-d984-5cc2-a2a0-89deac668eb3",
            "title": null,
            "identifiers": {
                "gtin": "00198482162061",
                "mpn": "HV1878-350"
            },
            "opt1": "Chlorophyll/Black",
            "opt2": "S",
            "opt3": null,
            "offers": [
                {
                    "price": {
                        "amount": 41.97,
                        "full_amount": 60,
                        "currency": "USD"
                    },
                    "availability": {
                        "in_stock": true,
                        "quantity": "In stock"
                    },
                    "condition": "new",
                    "seller": "Nike",
                    "seller_type": "1p"
                }
            ]
        },
        {
            "id": "032621f4-8f17-5716-932d-a93b0d1dfc4a",
            "title": null,
            "identifiers": {
                "gtin": "00198481839179",
                "mpn": "HV1878-350"
            },
            "opt1": "Chlorophyll/Black",
            "opt2": "M",
            "opt3": null,
            "offers": [
                {
                    "price": {
                        "amount": 41.97,
                        "full_amount": 60,
                        "currency": "USD"
                    },
                    "availability": {
                        "in_stock": true,
                        "quantity": "In stock"
                    },
                    "condition": "new",
                    "seller": "Nike",
                    "seller_type": "1p"
                }
            ]
        },
        {
            "id": "a73069dc-17b2-5dc7-b5cc-e78c9674d8cd",
            "title": null,
            "identifiers": {
                "gtin": "00198481982455",
                "mpn": "HV1878-350"
            },
            "opt1": "Chlorophyll/Black",
            "opt2": "L",
            "opt3": null,
            "offers": [
                {
                    "price": {
                        "amount": 41.97,
                        "full_amount": 60,
                        "currency": "USD"
                    },
                    "availability": {
                        "in_stock": true,
                        "quantity": "In stock"
                    },
                    "condition": "new",
                    "seller": "Nike",
                    "seller_type": "1p"
                }
            ]
        },
        {
            "id": "417e97e7-c31c-5ac0-999c-5b6779ba831d",
            "title": null,
            "identifiers": {
                "gtin": "00198482264932",
                "mpn": "HV1878-350"
            },
            "opt1": "Chlorophyll/Black",
            "opt2": "XL",
            "opt3": null,
            "offers": [
                {
                    "price": {
                        "amount": 41.97,
                        "full_amount": 60,
                        "currency": "USD"
                    },
                    "availability": {
                        "in_stock": true,
                        "quantity": "In stock"
                    },
                    "condition": "new",
                    "seller": "Nike",
                    "seller_type": "1p"
                }
            ]
        },
        {
            "id": "42484108-e343-520f-9ed1-1ca72a301174",
            "title": null,
            "identifiers": {
                "gtin": "00198481731473",
                "mpn": "HV1878-350"
            },
            "opt1": "Chlorophyll/Black",
            "opt2": "2XL",
            "opt3": null,
            "offers": [
                {
                    "price": {
                        "amount": 41.97,
                        "full_amount": 60,
                        "currency": "USD"
                    },
                    "availability": {
                        "in_stock": true,
                        "quantity": "Limited stock available"
                    },
                    "condition": "new",
                    "seller": "Nike",
                    "seller_type": "1p"
                }
            ]
        },
        {
            "id": "179d2b07-b59e-5a7d-912f-cebf81b1d13f",
            "title": null,
            "identifiers": {
                "mpn": "HV1878-350",
                "gtin": "00198482258597"
            },
            "opt1": "Chlorophyll/Black",
            "opt2": "3XL",
            "opt3": null,
            "offers": [
                {
                    "price": {
                        "amount": 41.97,
                        "full_amount": 60,
                        "currency": "USD"
                    },
                    "availability": {
                        "in_stock": false,
                        "quantity": "Out of stock"
                    },
                    "condition": "new",
                    "seller": "Nike",
                    "seller_type": "1p"
                }
            ]
        },
        {
            "id": "fad73aae-e6b1-58ac-83a3-f17125c0b3b2",
            "title": null,
            "identifiers": {
                "gtin": "00198482211318",
                "mpn": "HV1878-350"
            },
            "opt1": "Chlorophyll/Black",
            "opt2": "4XL",
            "opt3": null,
            "offers": [
                {
                    "price": {
                        "amount": 41.97,
                        "full_amount": 60,
                        "currency": "USD"
                    },
                    "availability": {
                        "in_stock": false,
                        "quantity": "Out of stock"
                    },
                    "condition": "new",
                    "seller": "Nike",
                    "seller_type": "1p"
                }
            ]
        }
    ],
    "recommended_products": [
        "https://www.nike.com/t/mens-dri-fit-basketball-t-shirt-WPpZO1IN/HV1772-010",
        "https://www.nike.com/t/victory-sunglasses-PP0tbC/DV2138-010",
        "https://www.nike.com/t/brasilia-95-training-backpack-medium-24l-zz5tL7/DH7709-068",
        "https://www.nike.com/t/ja-2-basketball-shoes-mkEicYoS/HQ8513-001",
        "https://www.nike.com/t/mens-basketball-t-shirt-MRuIhbgt/IO9764-133",
        "https://www.nike.com/t/dri-fit-club-structured-swoosh-cap-kxvJ3j/FB5625-222",
        "https://www.nike.com/t/22oz-big-mouth-water-bottle-2VjPJW/N0000042-968",
        "https://www.nike.com/t/lebron-witness-9-basketball-shoes-h9SkAFPT/II7520-100",
        "https://www.nike.com/t/primary-mens-dri-fit-short-sleeve-versatile-top-XK77j1/DV9831-097",
        "https://www.nike.com/t/utility-speed-backpack-27l-QnNg7P/FN4106-010",
        "https://www.nike.com/t/everyday-playground-8-panel-basketball-gcWDgD/N1003082-816",
        "https://www.nike.com/t/precision-7-easyon-mens-basketball-shoes-779glM/FN0324-101"
    ]
}

Key fields:

Field	Description
`product_id`	Primary product identifier on the site (product handle, ASIN, etc.)
`group_id`	Groups captures that are variants of the same product (e.g., different color pages)
`title`, `brand`, `description`	Core product identity
`image_url`	Primary product image URL
`images`	Product images with position and optional variant association
`min_price`, `max_price`, `currency`	Price range across all variants
`is_available`	Whether any variant is currently in stock
`variant_count`	Total number of variants
`properties_dict`	Structured attributes as key-value pairs (material, closure, etc.)
`properties_list`	Unstructured features and claims (bullet points from the product page)
`rating_average`, `rating_count`, `rating_scale`	Rating metrics
`options`	Up to 3 option axes (e.g., Color, Size) with all available values
`variants`	One entry per option combination, each with identifiers and offers
`variants[].identifiers`	GTIN, SKU, MPN, and other identifiers for this variant
`variants[].offers`	Price, availability, condition, and seller for each offer
`variants[].offers[].seller_type`	`1p` (marketplace selling directly), `3p` (third-party seller), or null

All fields are optional. What gets extracted depends on what the site exposes.

Analyzing captures with Python

Every Extralt organization gets full access to its own cloud storage. All data generated by your runs is yours — the storage token we provide gives you direct GCS access, so you can use your data however you want: pandas, DuckDB, Spark, or any tool that reads Parquet.

The notebook below shows how to authenticate, read captures into a DataFrame, and build a quick analysis.

Prerequisites:

An Extralt API key (set as EXTRALT_API_KEY environment variable, or saved in a .env file)
pip install gcsfs pandas pyarrow python-dotenv requests

In [1]:

import json
import os
import gcsfs
import pandas as pd
import requests
from google.oauth2.credentials import Credentials
from dotenv import load_dotenv
load_dotenv()

Out [1]:

True

In [2]:

def authenticate():
    api_key = os.environ["EXTRALT_API_KEY"]

    resp = requests.get(
        "https://api.extralt.dev/v1/storage/token",
        headers={"Authorization": f"Bearer {api_key}"},
    )

    resp.raise_for_status()

    data = resp.json()

    token = data["token"]
    uri = data["uri"]

    return token, uri


token, uri = authenticate()
fs = gcsfs.GCSFileSystem(token=Credentials(token=token))

List available runs

In [3]:

runs = fs.ls(f"{uri}captures/")
pd.DataFrame({"run": [r.split("/")[-1] for r in runs]})

Out [3]:

	run
0	kh72tvgdng8nq5yma8pwwrtf0182b2br

Pick a run and load its captures

In [4]:

run_id = runs[0].split("/")[-1]
df = pd.read_parquet(f"{uri}captures/{run_id}/data.parquet", filesystem=fs)
df

Out [4]:

	id	robot_id	robot_name	run_id	run_name	url	extracted_at	title	data
0	019cbcc8-f638-7f80-a4d0-3b81c342d7ba	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/club-mens-lacrosse-flee...	1.772694e+12	Nike Club	{"id":"M71768LX25-BLK","product_group_id":"Jao...
1	019cbcc8-f638-7f80-a4d0-3b90c0f1b3bc	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/colorado-rockies-city-c...	1.772694e+12	Colorado Rockies City Connect	{"id":"LM2W0CN5DNV-1U2","product_group_id":"MT...
2	019cbcc8-f638-7f80-a4d0-3badff7de589	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/minnesota-vikings-glory...	1.772694e+12	Minnesota Vikings Glory Max90	{"id":"01AY51A9M-RJD","product_group_id":"xhrM...
3	019cbcc8-f638-7f80-a4d0-3bbccd621653	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/los-angeles-rams-feel-t...	1.772694e+12	Los Angeles Rams Feel The Pressure	{"id":"03BA0DGG95-RZB","product_group_id":"jLk...
4	019cbcc8-f638-7f80-a4d0-3bc535e7cf44	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/cleveland-browns-swing-...	1.772694e+12	Cleveland Browns Swing Pass Rewind Club	{"id":"NKPU0DD693V-LDC","product_group_id":"4g...
5	019cbcc8-f639-7620-ac93-88e39a16654b	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/philadelphia-eagles-202...	1.772694e+12	Philadelphia Eagles 2025 NFC East Champions Tr...	{"id":"01K900A86Z-KZ5","product_group_id":"jLJ...
6	019cbcc8-f639-7620-ac93-88f3c6c38ea5	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/sportswear-essential-bi...	1.772694e+12	Nike Sportswear Essential	{"id":"FZ5535-610","product_group_id":"3yqbJpm...
7	019cbcc8-f639-7620-ac93-8907be277cc9	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/tech-mens-pullover-hood...	1.772694e+12	Nike Tech	{"id":"HV1342-437","product_group_id":"BmWkyVA...
8	019cbcc8-f639-7620-ac93-8916a2579c02	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/chelsea-fc-2025-26-matc...	1.772694e+12	Chelsea FC 2025/26 Match Home	{"id":"HJ4543-496","product_group_id":"qN2Fzp"...
9	019cbcc8-f639-7620-ac93-8927c89d4a5e	m5739en5f3pf86t8b234p9909h82av7m	www_nike_com-us-6442	kh72tvgdng8nq5yma8pwwrtf0182b2br	brave-skink-7455	https://www.nike.com/t/sportswear-club-fleece-...	1.772694e+12	Nike Sportswear Club Fleece	{"id":"HV0422-634","product_group_id":"7qBlsmz...

Parse the JSON data column

In [5]:

parsed = df.copy()
parsed["data"] = parsed["data"].apply(json.loads)
parsed["brand"] = parsed["data"].apply(lambda d: d.get("brand"))
parsed["gender"] = parsed["data"].apply(lambda d: d.get("gender"))

first_offer = lambda d: (d.get("variants") or [{}])[0].get("offers", [{}])[0]
parsed["price"] = parsed["data"].apply(
    lambda d: (first_offer(d).get("price") or {}).get("amount")
)
parsed["currency"] = parsed["data"].apply(
    lambda d: (first_offer(d).get("price") or {}).get("currency")
)
parsed["rating"] = parsed["data"].apply(
    lambda d: (d.get("ratings") or {}).get("average")
)
parsed["reviews"] = parsed["data"].apply(
    lambda d: (d.get("ratings") or {}).get("count")
)

parsed[
    [
        "title",
        "brand",
        "gender",
        "price",
        "currency",
        "rating",
        "reviews",
        "url",
    ]
]

Out [5]:

	title	brand	gender	price	currency	rating	reviews	url
0	Nike Club	Nike	Men	65.00	USD	NaN	NaN	https://www.nike.com/t/club-mens-lacrosse-flee...
1	Colorado Rockies City Connect	Nike	Women	155.00	USD	NaN	NaN	https://www.nike.com/t/colorado-rockies-city-c...
2	Minnesota Vikings Glory Max90	Nike	Men	55.00	USD	NaN	NaN	https://www.nike.com/t/minnesota-vikings-glory...
3	Los Angeles Rams Feel The Pressure	Nike	Men	90.00	USD	NaN	NaN	https://www.nike.com/t/los-angeles-rams-feel-t...
4	Cleveland Browns Swing Pass Rewind Club	Nike	Men	85.00	USD	NaN	NaN	https://www.nike.com/t/cleveland-browns-swing-...
5	Philadelphia Eagles 2025 NFC East Champions Tr...	Nike	Women	45.00	USD	NaN	NaN	https://www.nike.com/t/philadelphia-eagles-202...
6	Nike Sportswear Essential	Nike	Girls	17.97	USD	NaN	NaN	https://www.nike.com/t/sportswear-essential-bi...
7	Nike Tech	Nike	Men	103.97	USD	3.0	1.0	https://www.nike.com/t/tech-mens-pullover-hood...
8	Chelsea FC 2025/26 Match Home	Nike	Men	170.00	USD	NaN	NaN	https://www.nike.com/t/chelsea-fc-2025-26-matc...
9	Nike Sportswear Club Fleece	Nike	Girls	37.97	USD	NaN	NaN	https://www.nike.com/t/sportswear-club-fleece-...

Brand summary

In [6]:

brand_df = parsed[parsed["brand"].notna()]
brand_df.groupby("brand").agg(
    products=("brand", "count"),
    avg_price=("price", "mean"),
    min_price=("price", "min"),
    max_price=("price", "max"),
    avg_rating=("rating", "mean"),
).round(2).sort_values("products", ascending=False)

Out [6]:

	products	avg_price	min_price	max_price	avg_rating
brand
Nike	10	82.49	17.97	170.0	3.0