Marketplace Price Tracker & Comparison

by Akatra

Compare prices, sellers, stock and changes across marketplaces.

Trendyol Hepsiburada Price Tracker & Comparison: one normalized API to compare marketplace prices, sellers, stock and changes. Search once, compare across marketplaces, track what changed.

Turkey-first, global-ready marketplace intelligence. Version 1 covers Turkish marketplaces and two Turkish price-comparison sites. The data model, marketplace ids and matching engine already carry region, country and currency, so more regions can be added without changing the output.

What does Marketplace Price Tracker & Comparison do?

It does five things in one run and returns one table:

1. Discover. Searches each selected marketplace for your query, or opens the product URLs you give.
2. Normalize. Maps every offer to the same fields: price as a number, currency, seller, stock, rating, product ids.
3. Match. Groups identical products across marketplaces. Barcode (GTIN) matches are exact. Title-only matches are probable and are never used for a price verdict.
4. Compare. For safely matched groups it adds lowest price, highest price, price difference, cheapest marketplace and isCheapest to every row.
5. Detect changes. With a monitor key, later runs report price, stock and seller changes and can return only what changed.

One marketplace failing never fails the run. Each source reports its own health in the run summary.

Supported sources

Status comes from live tests on the Apify platform, not from the existence of an adapter.

Id	Source	Type	Status	Search	Product page	Sellers	Notes
trendyol_tr	Trendyol	marketplace	SUPPORTED	yes	yes	every seller of a product, seller score	Barcode on product pages
hepsiburada_tr	Hepsiburada	marketplace	SUPPORTED	yes	yes	featured seller plus other sellers shown on the page	Barcode on product pages
n11_tr	n11	marketplace	SUPPORTED	yes	yes	featured seller plus other sellers, stock count	Barcode on product pages
pazarama_tr	Pazarama	marketplace	SUPPORTED	yes	yes	featured seller name	No barcode field. Occasionally refuses a request; the run reports it
ciceksepeti_tr	Çiçeksepeti	marketplace	SUPPORTED	yes	yes	seller name, id and score	No barcode field
pttavm_tr	PttAVM	marketplace	SUPPORTED	yes	yes	seller name	No barcode or brand field
amazon_tr	Amazon Türkiye	marketplace	BETA	yes	yes	featured seller only	Not in the default selection. amazon.com.tr sometimes answers with a bot check; such requests are reported as blocked. Product pages are read only for product URLs you give and when "Include every seller" is on, at most 20 per run
akakce_tr	Akakçe	comparison_source	SUPPORTED	yes	yes	shop and seller of every listed offer	Not a marketplace: a price-comparison site
cimri_tr	Cimri	comparison_source	SUPPORTED	yes	yes	shop and seller of every listed offer	Not a marketplace: a price-comparison site

Akakçe and Cimri rows are labelled sourceType = comparison_source. They show what the comparison site lists at the time of the run. They are linked to the matching marketplace listing where possible, and they never decide the cheapest marketplace.

No adapter is DISABLED in this version.

What people use it for

• Price monitoring. Track your own products and competitors on several marketplaces with one schedule.
• Repricing input. Feed the lowest price, the gap to the lowest price and the cheapest seller into your pricing rules.
• Market research. See which marketplaces carry a product, at what price and from which sellers.
• Stock and buy box watching. Get a row when a product goes out of stock or the featured seller changes.
• AI agents. Answer "where is this cheapest", "what changed since yesterday" and "which rows could not be matched" from machine-readable fields.

What data can you extract?

One row per offer. Fields that a source does not provide are null. Nothing is guessed.

Group	Fields
Source	region, countryCode, marketplace, marketplaceName, sourceType, offerOrigin, sourceUrl, scrapedAt
Product	marketplaceProductId, productUrl, title, brand, model, sku, gtin, mpn, variant, condition, category, imageUrl
Price	currentPrice, originalPrice, basketPrice, discountPercent, currency
Seller	sellerName, sellerId, sellerUrl, sellerRating, sellerRatingScale, isFeaturedOffer
Comparison-site shop	merchantName, merchantMarketplace, merchantProductId, sourceOfferCount
Availability	stockStatus, availabilityEvidence, stockQuantity, shippingPrice, freeShipping, deliveryText
Ratings (aggregate only)	rating, reviewCount
Matching	productGroupId, matchLevel, matchReason
Comparison	comparisonEligible, groupOfferCount, groupMarketplaceCount, groupAvailableMarketplaceCount, lowestPrice, highestPrice, priceDifference, priceDifferencePercent, cheapestMarketplace, cheapestMarketplaces, cheapestSeller, highestMarketplace, isCheapest, priceGapToLowest
Changes	monitorStatus, changeTypes, previousPrice, priceChange, priceChangePercent, previousOriginalPrice, previousStockStatus, previousSeller, firstSeenAt, lastSeenAt, changedAt
Search	searchQuery, rank

availabilityEvidence tells you how strong the stock information is: explicit when the source states it, indirect when the product is only listed with a buyable price, none when there is no evidence.

Prices are numbers in the row's currency. Turkish formats such as 64.999,90 TL are parsed with exact decimal arithmetic.

How to use it

1. Open the Actor and type one or more product names in Search queries, for example iPhone 16 128 GB. Be specific: every word of the query must appear in a listing.
2. Pick the Marketplaces, or leave the default selection.
3. Optional: paste product URLs in Product or search URLs to track specific products.
4. Optional: set a Monitor key and turn on Return only what changed to get changes on later runs.
5. Start the run. Download the dataset as JSON, CSV or Excel, or read it through the API.

Input example (JSON)

Search and compare:

{
  "region": "TR",
  "searchQueries": ["iPhone 16 128 GB"],
  "marketplaces": ["trendyol_tr", "hepsiburada_tr", "n11_tr", "pazarama_tr"],
  "maxResultsPerMarketplace": 10,
  "includeSellers": true
}

Track specific product pages and return only changes above 3 percent:

{
  "startUrls": [
    { "url": "https://www.trendyol.com/apple/iphone-16-128gb-beyaz-p-857296082" },
    { "url": "https://www.hepsiburada.com/apple-iphone-16-128gb-beyaz-p-HBCV00006Y4HFL" },
    { "url": "https://www.n11.com/urun/apple-iphone-16-128-gb-apple-turkiye-garantili-59257801" }
  ],
  "monitorKey": "iphone-16-white",
  "onlyChanged": true,
  "priceChangeThresholdPercent": 3
}

Add the comparison sites and the beta Amazon adapter:

{
  "searchQueries": ["dyson v15"],
  "marketplaces": ["trendyol_tr", "hepsiburada_tr", "amazon_tr", "akakce_tr", "cimri_tr"],
  "maxResultsPerMarketplace": 5
}

Marketplace ids always carry the region (trendyol_tr, amazon_tr). Short names such as trendyol are accepted as input and are returned as the full id.

Sample output (JSON)

A real row from a run on 3 October 2026: one of three Hepsiburada sellers of a product that was matched by barcode on four marketplaces.

{
  "region": "TR",
  "countryCode": "TR",
  "marketplace": "hepsiburada_tr",
  "marketplaceName": "Hepsiburada",
  "sourceType": "marketplace",
  "offerOrigin": "product_page",
  "marketplaceProductId": "HBCV00006Y4HFL",
  "productUrl": "https://www.hepsiburada.com/apple-iphone-16-128gb-beyaz-p-HBCV00006Y4HFL",
  "title": "iPhone 16 128GB Beyaz",
  "brand": "Apple",
  "model": null,
  "sku": "HBCV00006Y4HFL",
  "gtin": "0195949822124",
  "mpn": null,
  "variant": "Beyaz",
  "condition": "new",
  "currentPrice": 74979.08,
  "originalPrice": null,
  "basketPrice": null,
  "discountPercent": null,
  "currency": "TRY",
  "sellerName": "Troy Apple",
  "sellerId": "1da370aa-3e19-4ddc-8520-f5b1cf9e1066",
  "sellerUrl": null,
  "sellerRating": 9.7,
  "sellerRatingScale": 10,
  "isFeaturedOffer": false,
  "merchantName": null,
  "merchantMarketplace": null,
  "merchantProductId": null,
  "sourceOfferCount": null,
  "stockStatus": "in_stock",
  "availabilityEvidence": "explicit",
  "stockQuantity": null,
  "shippingPrice": null,
  "freeShipping": false,
  "deliveryText": null,
  "rating": 4.8,
  "reviewCount": 3613,
  "imageUrl": "https://productimages.hepsiburada.net/s/777/375/110000767394638.jpg/format:webp",
  "category": "Telefon > Cep Telefonu > iPhone iOS Telefonlar",
  "searchQuery": null,
  "rank": null,
  "productGroupId": "TR:gtin:0195949822124",
  "matchLevel": "exact",
  "matchReason": "same_gtin",
  "comparisonEligible": true,
  "groupOfferCount": 17,
  "groupMarketplaceCount": 4,
  "groupAvailableMarketplaceCount": 4,
  "lowestPrice": 73399,
  "highestPrice": 99999,
  "priceDifference": 26600,
  "priceDifferencePercent": 36.24,
  "cheapestMarketplace": null,
  "cheapestMarketplaces": ["n11_tr", "pazarama_tr", "trendyol_tr"],
  "cheapestSeller": "MediaMarkt",
  "highestMarketplace": "trendyol_tr",
  "isCheapest": false,
  "priceGapToLowest": 1580.08,
  "monitorStatus": "baseline",
  "changeTypes": [],
  "previousPrice": null,
  "priceChange": null,
  "priceChangePercent": null,
  "previousOriginalPrice": null,
  "previousStockStatus": null,
  "previousSeller": null,
  "firstSeenAt": "2026-10-03T19:08:05Z",
  "lastSeenAt": "2026-10-03T19:08:05Z",
  "changedAt": null,
  "sourceUrl": "https://www.hepsiburada.com/apple-iphone-16-128gb-beyaz-p-HBCV00006Y4HFL",
  "scrapedAt": "2026-10-03T19:08:08Z"
}

Three marketplaces tied at the lowest price in that run, so cheapestMarketplace is null and cheapestMarketplaces lists the three. The same store, MediaMarkt, held that price on each of them.

A changed row from the next run with the same monitor key, about two minutes later (only the change fields are shown). It is a shop offer listed by the comparison site Cimri:

{
  "marketplace": "cimri_tr",
  "sourceType": "comparison_source",
  "merchantName": "Vatan Bilgisayar",
  "title": "Apple iPhone 16 128 GB Beyaz",
  "currentPrice": 73399,
  "currency": "TRY",
  "monitorStatus": "changed",
  "changeTypes": ["PRICE_CHANGED"],
  "previousPrice": 82999,
  "priceChange": -9600,
  "priceChangePercent": -11.57,
  "firstSeenAt": "2026-10-03T19:08:05Z",
  "lastSeenAt": "2026-10-03T19:10:02Z",
  "changedAt": "2026-10-03T19:10:02Z"
}

How products are matched

Comparing prices is only useful when the products are really the same, so every row says how it was matched.

matchLevel	Meaning	Used for the price verdict?
exact	Same barcode (GTIN), or the same marketplace listing reached through another source	yes
strong	Same brand and manufacturer part number, or a listing id that equals a barcode another offer declares	yes
probable	No shared identifier. Brand, model words, storage, memory, colour, pack size, sizes and condition read from the titles are identical, and they point to exactly one product group	no
unmatched	Anything else. matchReason says why	no

Rules that keep groups honest:

• 128 GB and 256 GB, different colours, a single item and a multipack, new and refurbished, different refurbished grades and different model generations are never the same group.
• Accessories ("uyumlu kılıf", chargers, filters) and gift bundles are never matched to the device.
• A title that fits two different product groups stays unmatched with matchReason = ambiguous_multiple_candidate_groups.
• A shared barcode or part number is not enough when the titles contradict it (a refurbished or graded listing, another size or colour, a multipack or a gift bundle that reuses the barcode): the contradicting offer leaves the group with matchReason = identifier_shared_with_conflicting_attributes.
• Price is never used as evidence that two offers are the same product.
• probable rows and comparison-site rows join a group for reference only: comparisonEligible is false and isCheapest is null.
• cheapestMarketplace is filled only when the product can be bought on at least two marketplaces (definitive match, priced, not out of stock) and one of them is strictly cheapest. On a tie it is null and cheapestMarketplaces lists the tied ones. When only one marketplace has it available, nothing is named cheapest (cheapestMarketplace, cheapestSeller and isCheapest are null); groupAvailableMarketplaceCount is 1.
• Offers are compared only inside one region and one currency. There is no currency conversion in this version.

Colour is part of the identity: the white and the black version of a phone are two groups, because their prices and stock differ.

Change tracking

Set monitorKey to name a tracking job and run the Actor on a schedule.

• First run for a key: every offer is stored as the baseline and returned with monitorStatus = baseline. Nothing is reported as a change.
• Later runs: each offer is unchanged, changed or new. With onlyChanged = true only changed, new and removed rows are written.
• Not checked: when the product page behind a search result cannot be read in a run (blocked, timed out, or it shows another variant), the row carries the search-result data and monitorStatus = not_checked. It is not compared and the history is left as it was, so a temporary failure is never reported as a new offer or a price change. With onlyChanged = true such rows are not written.
• Change types: PRICE_CHANGED, ORIGINAL_PRICE_CHANGED, STOCK_CHANGED, SELLER_CHANGED, NEW_OFFER, PRODUCT_REMOVED, PRODUCT_RETURNED.
• Threshold: priceChangeThresholdPercent = 3 ignores price moves under 3 percent. The change is measured against the last reported price, so several small moves add up. Stock and seller changes are never hidden by the threshold.
• Removal is conservative. PRODUCT_REMOVED is reported only for product URLs you track (it is tracked per URL), and only after two runs in a row received an explicit "product not found" answer. A timeout, a block or a missing search result is never a removal. The summary counts such cases as temporarily unreachable.
• If the history store is unreachable the run still returns every offer, with monitorStatus = off and a warning in the summary.
• Keys are isolated. Different monitor keys never share history, and history is stored per region and marketplace in your own account (named key-value store marketplace-price-monitor). Offers not seen for 180 days are dropped from the history.
• With onlyChanged = true and no key, a key is derived from the queries, URLs and marketplaces. Changing any of them starts a new baseline.

Good to know: marketplaces rotate the featured seller of popular products among sellers with the same price. Those rotations appear as SELLER_CHANGED on the featured row; the seller that lost the position keeps its history and is not reported as new. A product that enters the top results of a search for the first time appears as NEW_OFFER.

Use it with AI agents, MCP and the API

Every question an agent is likely to ask maps to a field:

Question	Field
Where is this product cheapest?	cheapestMarketplace, cheapestMarketplaces, isCheapest
Which seller has the lowest price?	cheapestSeller, or the row with isCheapest = true
How big is the difference?	priceDifference, priceDifferencePercent, priceGapToLowest
Which marketplaces have it in stock?	stockStatus with availabilityEvidence
What changed since the last run?	monitorStatus, changeTypes, previousPrice, previousStockStatus, previousSeller
Which results could not be matched with confidence?	matchLevel of probable or unmatched, with matchReason
Which source failed in this run?	adapters[].health in the SUMMARY record

The run writes a SUMMARY record to the default key-value store with queries and URLs processed, offers found and written, matched and unmatched counts, change counts, requests, cache hits, bytes processed, warnings and one entry per source with its health: success, partial, no_results, blocked, rate_limited, parse_error, temporarily_unavailable or unsupported. The health describes this run only.

Call the Actor through the Apify API, the Apify MCP server, or any Apify integration. Dataset views overview, comparison and changes give ready-made column sets.

Pricing: pay per result

You pay per offer row written to the dataset. See the Pricing tab for the current price. Rows that onlyChanged suppresses are not written and are not charged. Sources that fail in a run produce no rows and cost nothing. You can cap the cost of a run with the maximum charge setting; the run stops writing at the cap, and tracked changes that were not written are reported again by the next run.

Run status and messages

A run ends as failed only when the input is invalid. Everything else ends as succeeded with a message that says what happened.

Message	Meaning
Saved N offer(s) from X/Y source(s)	Normal result. X of Y sources returned data
... product group(s) compared	Number of groups with a price comparison
monitor baseline created	First run of this monitor key
... unchanged offer(s) not repeated	Rows suppressed by onlyChanged
unavailable this run: ...	Sources that were blocked, rate limited or returned an unexpected page. Details are in SUMMARY
Nothing matched every word of the query	Try a shorter or more general query
Stopped early: the run's maximum charge was reached	The saved rows are complete; raise the cap to get the rest
Invalid input: ...	The only failed status. The message names the field

Good to know

• Data is fetched at run time. It is a snapshot of what each site showed during the run, not a live feed.
• Search results are filtered: a listing is kept only when every word of your query appears in it. Marketplaces pad results with loosely related items, and those are dropped instead of being returned.
• The numeric id in many Pazarama URLs equals the product barcode, but Pazarama does not label it as one, so gtin stays null for Pazarama rows. The id is used for matching only when it equals a barcode that another offer declares.
• On Pazarama, Çiçeksepeti and PttAVM the price shown as "Sepette" or "Sepete Özel" (in basket) is the price a buyer pays, so it is the currentPrice; the listed price is the originalPrice and basketPrice repeats the basket price. basketPrice is not filled for the other sources.
• On Hepsiburada a discounted product carries two prices; currentPrice is the discounted one the page shows and originalPrice the list price.
• One n11 product URL covers several colours, storage sizes and sellers. The Actor keeps the seller and variant parameters of the URL, and the marketplaceProductId of an n11 row names the variant (for example 59257801:dahili-hafiza=128-gb,renk=beyaz). A bare n11 URL shows whichever seller and variant n11 features at that moment; add the variant parameters to track one variant.
• Trendyol and Hepsiburada URLs are read without their seller or size parameters: the row is the page's default variant and featured seller.
• Çiçeksepeti rows cover both marketplace products and its own flower and gift products.
• PttAVM writes the seller name into its brand field. The Actor does not export that as a brand.
• Amazon Türkiye rows come from the search page unless "Include every seller" is on, because its product pages are heavy and carry no barcode. At most 20 Amazon product pages are read per run: further search results keep their search-page data, further Amazon product URLs are skipped, and the run message and SUMMARY say how many.
• Akakçe and Cimri prices are what those sites list. They can be older than the marketplace page. Cimri serves cached pages, so one run can read an older copy and the next run a refreshed one; the difference is then reported as a change.
• The Actor uses plain HTTP requests. It does not log in, does not solve CAPTCHAs or bot checks, and does not use private APIs. A source that asks for verification is reported as blocked for that run.
• Requests go only to the listed marketplace domains. URLs on other domains are skipped and listed in the summary.
• Maximum per run: 50 queries, 500 URLs, 100 results per marketplace and query.

Changelog

• 1.0 (October 2026). First version. Region TR. Trendyol, Hepsiburada, n11, Pazarama, Çiçeksepeti, PttAVM, Akakçe and Cimri supported, Amazon Türkiye in beta. Product matching, price comparison and change tracking.

Legal and privacy

The Actor reads publicly visible product, price, seller-store and availability data. It collects no customer data: no review texts, no reviewer names or profiles. Seller data is limited to the store name, store id, store page and store score shown on the marketplace; seller legal details such as tax numbers, addresses, e-mail addresses and phone numbers are not collected even where a page shows them. It performs no purchases and uses no accounts.

You are responsible for using the data in line with the terms of the sites and the laws that apply to you. This Actor is not affiliated with Trendyol, Hepsiburada, Amazon, n11, Pazarama, Çiçeksepeti, PttAVM, Akakçe or Cimri.

Support

Found a wrong price, a wrong match or a source that stopped working? Open an issue on the Issues tab with the run id. The SUMMARY record of that run shows what each source returned.