Product listing requirements on 12 marketplaces and channels

Title limits run from 70 characters on bol¹⁶ to 255 on TikTok Shop²¹. Two channels do not fit a single number: OTTO writes the title itself from your category, brand and productLine data²², and Kaufland publishes a recommended range of 50 to 80 characters with no hard maximum⁵. Amazon's 75-character limit for non-media product types has applied since 27 July 2026^1,2.

Description maximums range from 2,000 characters on Cdiscount⁶ to 500,000 on eBay¹⁷. Seven of the 12 channels have no bullet point field and expect key features inside the description or in attributes^{3,4,5,6,7,8,9}.

Amazon does not publish one description or bullet limit on its public help pages; limits are set per product type^62,76. Third-party copies of Amazon's own product type schemas for two stores allow descriptions of up to 10,000 UTF-8 bytes and up to 10 bullets of 700 characters^63,64. Amazon's seller site says up to five bullets⁷⁷, and its older US category style guides give 2,000 characters for descriptions^65,80. Check the product type definition for your own product type before you rely on any of these numbers.

500 pixels is the most common minimum image size: Amazon, bol, OTTO (short side), Cdiscount, Allegro, eBay and Meta use it^{10,11,12,6,13,14,9}. Google enforces 500 x 500 px from 31 January 2027 and will optimize some smaller images automatically, with a warning^15,25. Maximum file sizes range from 5 MB on Cdiscount and Walmart to 25 MB on OTTO^6,27,12.

Image rules are where "recommended" and "required" are easiest to confuse. bol still publishes its size and background guidance but stopped enforcing it on 1 July 2025, apart from its rules on self-promotion¹¹. eBay recommends a white background but does not require it¹⁴, and so does Meta⁸⁸. Zalando accepts lifestyle and ambient backgrounds on packshots and changes white backgrounds to light grey²⁶. Amazon, Allegro (with category exceptions) and Walmart ask for pure white (RGB 255) main images^10,86,27. OTTO's onboarding guide does too, while its API best practices also accept a light neutral background^12,32.

Nine of the 12 channels take product video as a file or link field. OTTO does not support video yet¹², Cdiscount's public API has no video field⁶, and Allegro only allows a YouTube link inside the description⁵⁸.

bol, Zalando, OTTO, Kaufland and Cdiscount make the EAN or GTIN mandatory^28,29,30,5,6, and none of their public pages describes an exemption process^{28,31,32,5,33}. Amazon and Walmart run formal exemption requests^34,35, while Google, Meta and TikTok Shop treat the GTIN as recommended or optional^36,37,21.

Amazon uses a non-buyable parent product with buyable children¹¹⁹. OTTO, Google and Meta link variants through a shared key without a parent^69,120,89, and Kaufland and Allegro group variants themselves^121,122.

Missing GPSR data blocks or hides listings on Amazon, eBay, bol, Kaufland, Allegro and TikTok Shop. Amazon deactivates a listing 24 hours after creation if GPSR attributes are missing³⁸, eBay hides such listings from EU and Northern Ireland buyers³⁹, and Kaufland excludes offers without the contacts⁴¹. Google's product data specification and Meta's catalog field reference have no dedicated GPSR fields^45,9.

EPR registration numbers are an account setting, not a product field. Amazon, eBay (Germany), Zalando, OTTO, Kaufland and Allegro collect them at account or seller-profile level^{46,47,48,12,49,50}.

Electronics and appliance sellers need this table on every EU channel. Under the EU energy labelling framework, dealers selling online must show the supplier's label and make the product information sheet available¹⁵¹. Suppliers register each new model in the EU product database (EPREL) before placing it on the market¹⁵¹ and must pass the EPREL registration number on to dealers¹⁵². The Commission's guidance asks online sellers to show the label and sheet near the price¹⁵³.

Keep more than one file format per model. EPREL generates labels as PDF, SVG and PNG only¹⁵⁸, while Allegro accepts JPEG, JPG or PNG⁷, Zalando wants PDF⁵⁶ and OTTO needs RGB images of at least 500 x 1,000 px³². Cdiscount caps attached files at 1 MB¹⁵⁵. On eBay, a newly registered EPREL product can take up to a week to appear on the listing⁵⁴.

The channels changed several of these rules between January 2025 and October 2026. The changes that most affect a catalog:

• Amazon split titles into a 75-character item name and a 125-character Item Highlights field, 200 characters in total; the API accepts the highlights only when the item name is 75 characters or fewer²⁴. The rule applies to submissions from 27 July 2026; existing listings follow in a gradual rollout and are unaffected until updated²⁴. Legacy XML and flat-file listing feeds stopped working on 31 July 2025¹⁶⁸.
• Google moved EU energy labels to the certification attribute in April 2025⁵³, sunset the Content API for Shopping on 18 August 2026, with HTTP 410 errors from 1 September 2026 for projects without an extension^183,184, added optional attributes such as question_and_answer and document_link in May 2026¹⁹⁰, and added a per-item returns attribute to the Merchant API in August 2026¹⁹⁰.
• Meta ended checkout on Facebook and Instagram in September 2025; Shops now send buyers to the merchant's website and need a checkout URL to stay visible^191,192.
• bol made manufacturer details and an EU economic operator mandatory for new items in March and April 2026⁴⁰ and launched Offer API v11 on 19 January 2026¹⁹³. It has since announced required attributes for pet care and pet food from 1 January 2027 and for products with hazardous substances (CLP) from 1 January 2028^194,195.
• Allegro set a 12-character, 3-word minimum for titles from 7 May 2025¹⁹⁶ and, with PPWR applying from 12 August 2026, asks packaging producers for a PPWR EPR number in account details, which does not block sales yet¹⁹⁷. Its API resources for multi-variant offers were removed on 14 April 2026¹²².
• Zalando removed the deprecated Articles API reference on 30 June 2026; product submission runs through the Product Submission API¹⁷⁴. Its 2025 and 2026 developer release notes mention no XML feed deprecation¹⁷⁴. From 1 January 2027 it blocks partners without packaging EPR details⁵¹.
• eBay scheduled the Trading API image upload call for decommission on 30 September 2026¹⁸⁰ and adds EU customs product identifiers for non-EU shipments from 1 November 2026¹⁰³.
• Walmart's developer docs, updated in September 2026, describe requesting a GTIN exemption inside the item setup feed¹⁰⁷ and now recommends Item Spec 5.0.20260829-12_49_39-api¹⁹⁸.

• Titles: 75 characters including spaces for non-media product types, required from 27 July 2026^1,2. Characters such as ! $ ? _ { } ^ are not allowed, and no word may appear more than twice¹. Item Highlights holds up to 125 characters²³. In the SP-API, Amazon may split an item_name over 75 characters across item_name and title_differentiation, while getListingsItem still returns the submitted value; error 100476 means item_name exceeds 75 characters while title_differentiation is present²⁴.
• Description and bullets: Amazon's public help pages do not state a description limit; limits are set per product type⁶². No HTML apart from line breaks²³. Include at least three bullet points⁷⁶; Amazon's seller site says up to five⁷⁷. Third-party copies of Amazon's product type schemas allow more; see the description and bullet section.
• Amazon image requirements: main images need a pure white background (RGB 255) with the product filling 85% of the frame¹⁰. Images must be 500 to 10,000 px on the longest side, and 1,000 px or more enables zoom¹⁰. JPEG, TIFF, PNG and non-animated GIF are accepted⁸³. The SP-API takes a main image and up to nine more⁸⁴; Amazon recommends at least 6 additional images and 1 video¹⁰. No per-image file size is published on any Amazon page we could read⁸². Photorealistic AI-generated people must carry an IPTC disclosure keyword¹⁰.
• Identifiers and brand: most categories need a product ID that Amazon checks against GS1¹⁰⁰. GTIN exemptions are granted per parent product type, store and category, with a decision within 48 hours³⁴. New brand names need approval¹⁰⁸.
• Variants: a non-buyable parent with up to 4,000 child ASINs¹¹⁹.
• Compliance: EU listings need manufacturer, EU Responsible Person and safety information¹⁴¹; listings without them are deactivated after 24 hours³⁸. EPR numbers go in Account Health; the German LUCID number is "DE" plus 13 digits⁴⁶.
• Upload: use the Listings Items API, JSON_LISTINGS_FEED or spreadsheet templates^169,170. Product type attributes and enumerations are updated monthly²¹⁷.

• Titles: 70 characters including spaces, no English words, no whole words in capitals¹⁶. Get the title right within 2 weeks of adding an item, because the page URL is based on it¹⁶.
• Description: no length limit is stated⁶⁷. Allowed HTML is limited to b, br, h3, li, ol, ul, p and strong³. There is no separate bullet field³.
• Images: 500 x 500 px to 6,000 x 6,000 px, 30 KB to 10 MB, zoom from 1,200 x 1,200 px¹¹. The guidelines have not been enforced since 1 July 2025, except the self-promotion rules¹¹.
• Identifiers and brand: every offer needs a valid EAN or ISBN²⁸; branded items need a GS1-registered EAN²⁸. The brand must be registered with BOIP, EUIPO or WIPO¹¹¹.
• Variants: product families share a Family Key, with at most 70 products per family¹²⁴.
• Compliance: each item needs manufacturer details and a responsible economic operator in the EU⁴⁰. New items without manufacturer details stopped going online from 5 March 2026, and new items without an economic operator from 1 April 2026; existing items without manufacturer details go offline in phases from 1 April 2026⁴⁰. Legally required product information, including energy labels and data for connected devices, had to be complete before 2 September 2026, with items in the listed product groups going offline from 16 September 2026¹⁵⁴; bol's Dutch version of the page gives 16 September 2026 as the deadline²¹¹. Pet care and pet food need new attributes such as dosage, ingredients, animal type and food type, with packaging language in an official language of the country of sale; bol enforces them from 1 January 2027 and does not accept vague placeholder values¹⁹⁴. Products with hazardous substances need CLP data such as UFI, H, P and EUH phrases and a safety data sheet; the deadline moved from 1 July 2026 to 1 January 2028, and items with missing or incorrect data go offline¹⁹⁵. Soft drinks need deposit attributes, and bol has added the deposit to the price itself since 15 April 2026²⁰⁵.
• Upload: seller dashboard, Excel, the Retailer API or integration partners¹⁷². Offer API v10 is removed on 1 February 2027¹⁹³.

• Titles: article names of 101 characters or fewer¹⁸. Names are not translated across markets, so Zalando advises English or globally recognisable names¹⁸.
• Description: plain text only, keyed by locale⁶⁸; no maximum is published⁶⁸ and there is no bullet field⁴.
• Images: JPG in sRGB, portrait, ratio 1:1.44²⁶, at least 762 x 1,100 px and up to 20 MB²⁶. Apparel, accessories and shoes need at least 3 images²⁶.
• Video: MP4 (H.264), up to 250 MB, ideally about 15 seconds, no sound⁹².
• Identifiers: an EAN on every size²⁹.
• Variants: model, config (colour) and simple (size and EAN) tiers, all sent in one submission^125,68.
• Compliance: GPSR contacts per brand in zDirect⁵⁶. Article-level safety data includes warnings, which must be submitted in English (other languages go through Partner Care), and PDF manuals and energy labels for some categories⁵⁶. Packaging EPR registration is required in every EU market operated as of 12 August 2026²⁰⁹; from 1 January 2027, Zalando blocks the assortment of partners who have not provided EPR details⁵¹. A 15 October 2026 action notice covers electronics EPR in Belgium, France and Germany, and Belgian electronics details are due in zDirect from 31 October 2026^213,48.
• Markets: the developer release notes added Greece and Bulgaria sales channels in December 2025¹⁷⁴, while the Partner Program onboarding page lists 15 sales countries without them²⁰⁹.

• Titles: sellers do not submit a title; OTTO builds it from category, brand and productLine, which has a 70-character maximum^22,30.
• Description and bullets: descriptions should stay under 2,000 characters³⁰; HTML is limited to a whitelist⁶⁹; each bullet point is 3 to 180 characters³⁰.
• Images: JPEG or PNG in RGB, at least 500 px on the short side and 1,000 px on the long side, at most 4,500 px, up to 25 MB; the product fills 85% to 95% on white¹². Up to 10 images per variant¹².
• Video: not supported¹².
• Identifiers and brand: an EAN on every variation, not starting with 2³⁰; brands come from OTTO's brand list³⁰.
• Compliance: a compliance container with manufacturer and distributor addresses is required on every variation³⁰. Energy labels and data sheets are media assets³⁰.
• Upload: Products API V5 with up to 500 variations per request; CSV upload in the portal is not yet possible^69,12. Support for Products API v4 ended on 10 December 2025¹⁹⁹.

• Titles: 50 to 80 characters recommended, no published hard maximum⁵.
• Description: 150 to 5,000 characters is Kaufland's recommended length, not a stated hard limit⁵. Plain text or HTML without JavaScript, links, images or videos⁵.
• Images: at least 1,024 px (2,048 px for zoom), up to 10 MB, 5 to 10 images recommended⁵. Kaufland describes alt text as legally required since June 2025⁵.
• Identifiers: an EAN is mandatory, and each product has a single EAN and product page⁵.
• Required attributes: ean, category, title, description, manufacturer and picture⁵⁵. A video attribute was added on 30 July 2026¹¹².
• Language: product data in each storefront's national language; Kaufland offers free translation¹¹³. Kaufland now invites sellers to its Dutch storefront, Kaufland.nl, where product data is in Dutch under the same rule^133,113.
• Compliance: manufacturer and EU responsible person contacts; offers missing them are excluded from selling⁴¹. A GPSR Contacts API followed on 9 September 2026¹¹².
• Upload: CSV files use semicolons and UTF-8²¹⁸, and CSV imports can be up to 1.5 GB⁸⁵. Fulfillment by Kaufland ended on 28 February 2025¹¹².

• Titles: 132 characters, mandatory⁶.
• Description: 2,000 characters with no HTML or URLs; an optional rich marketing description takes up to 5,000 characters with some HTML⁶.
• Images: 1 to 6 images, up to 5 MB each, in JPG, PNG, GIF, BMP or WEBP⁶; 500 x 500 px minimum⁶.
• Identifiers: a GTIN is always required and no exemption is granted^6,33.
• Taxonomy: three levels; products are created on level 3⁶.
• Language: only fr-FR product sheets are available on Cdiscount⁶.
• Compliance: no dedicated GPSR fields in the public API⁶, and no fixed energy label fields; category properties decide what is needed¹⁵⁵.

• Titles: 12 to 75 characters, at least 3 words⁷; the minimum has applied since 7 May 2025¹⁹⁶. Titles use a fixed character whitelist, and '&' is stored as an HTML entity that counts as 5 characters⁷⁰.
• Description: up to 40,000 bytes for the whole description in up to 100 sections, with only h1, h2, p, ul, ol, li and b allowed⁷⁰.
• Images: longer side at least 500 px; up to 10 images for personal accounts and 16 for business accounts¹³. The thumbnail needs a pure white background, with category exceptions⁸⁶. Deepfake-type AI-generated or AI-modified images must be labelled²⁰⁸.
• Identifiers: whether a GTIN is required depends on the category¹⁰¹; offers are expected to link to a Catalogue product¹⁰¹. Since 6 October 2025, trusted catalog data cannot be overridden on new-condition offers on allegro.pl²⁰³.
• Variants: product variants are grouped automatically from the Catalogue, and sellers can suggest changes in Sales Center. The API resources for multi-variant offers were removed on 14 April 2026, and calls to them return 404^122,126.
• Language: titles and descriptions are translated automatically for additional marketplaces¹³⁴.
• Compliance: producer data, an EU responsible person when the producer is outside the EU, and safety information^42,7. EPR numbers, including the Polish BDO number, go in the account-level EPR numbers form with one field per destination country; the public API has no field for them^50,7. Battery producers have had to give a number per country since 18 August 2025²⁰².

• Titles: 80 characters; an optional subtitle of 55 characters¹⁷.
• Description: up to 500,000 characters including HTML; active content is not allowed^17,71.
• Images: at least 500 x 500 px, about 1,600 x 1,600 px recommended, up to 12 MB, up to 24 photos^14,87. The Trading API call UploadSiteHostedPictures was scheduled for decommission on 30 September 2026; API uploads use the Media API¹⁸⁰.
• Identifiers: a GTIN is mandatory in certain categories for new branded items¹⁰². From 1 November 2026, items shipped from outside the EU to EU buyers need product identifier data regardless of value: eBay supplies the listing ID, and sellers add another identifier such as an MPN, plus a GTIN where one exists¹⁰³.
• Vehicle parts: from mid-November 2026, the eBay Fitment Service adds vehicle compatibility data to eligible listings on ebay.de²¹⁶.
• Variants: up to 250 variants per listing on ebay.de¹²⁷. Apparel and footwear sizes must use standardized values since a blocking API error was added on 24 August 2026²⁰⁶.
• Compliance: manufacturer and up to 5 EU Responsible Persons per listing^39,8; listings without GPSR data are hidden from EU and Northern Ireland buyers³⁹. German EPR numbers are stored at account level⁴⁷. Energy class, label and information sheet go in item specifics and image uploads, or the seller can give an EPREL number⁵⁴.

• Titles: 1 to 150 characters¹⁹.
• Description: 1 to 5,000 characters⁷²; up to 100 product highlights of 150 characters each⁵³.
• Google Shopping image requirements: at least 500 x 500 px for all products, enforced from 31 January 2027¹⁵; about 1,500 x 1,500 px recommended¹⁵; no larger than 64 megapixels or 16 MB¹⁵. Some images under 500 x 500 px will be optimized automatically and flagged with a warning instead of being disapproved, and warnings have been issued since 14 April 2026²⁵. The product should fill 75% to 90% of the image¹⁵. Up to 10 additional images⁵³. Images made with generative AI must keep their IPTC metadata¹⁵.
• Identifiers: GTIN recommended when one exists; set identifier_exists to no for products without one^36,104.
• Energy labels: EU products that need a graphical energy label use the certification attribute with the EPREL registration number⁵³.
• Taxonomy: the Google product taxonomy has 5,595 categories and up to 7 levels¹⁶².
• Upload: TSV or XML files up to 4 GB¹⁸²; the Content API for Shopping was sunset on 18 August 2026 in favour of the Merchant API¹⁸³. Projects without an approved extension get intermittent HTTP 410 errors from 1 September 2026, and all requests fail at full shutdown in early 2027¹⁸⁴. Since August 2026 the Merchant API also takes a per-item returns attribute that sets or overrides the return policy¹⁹⁰.

• Required fields: id, title, description, availability, condition, price, link, image_link and brand⁸⁹.
• Titles: up to 200 characters, under 65 recommended⁶⁰. Titles must describe the product accurately without keyword stuffing; title case and no promotional text are recommendations⁶⁰.
• Description: required, plain text, up to 9,999 characters; the description specification also sets a 30-character minimum⁷³; an optional HTML rich_text_description is shown in Shops but not in ads⁷⁴.
• Images: JPEG or PNG, at least 500 x 500 px, up to 8 MB⁹; 1,024 x 1,024 px recommended and shown square in Shops⁸⁸. A white background is recommended, not required, and Meta publishes no fill percentage⁸⁸. Up to 20 additional images⁸⁹.
• Video: up to 20 videos of up to 200 MB each⁹.
• Shops and checkout: checkout on Facebook and Instagram ended in September 2025, and Shops need a checkout URL on your website^191,192. The full Shops experience is US only; Germany, France, Italy, the Netherlands, Spain, Denmark and Sweden are in an open beta²¹⁹.
• Compliance: no GPSR, EPR or energy label fields in the catalog reference^9,37. In the EEA, Marketplace is for consumer-to-consumer sales and businesses may face restrictions²²⁰.
• Upload: CSV, TSV, RSS XML or ATOM XML feeds; scheduled feeds run at most once per hour^185,221.

• Titles: 1 to 255 characters in DE, ES, FR, IE, IT and the UK²¹.
• Description: HTML required, up to 10,000 characters²¹; up to 5 key product features²¹.
• Images: up to 9 main images of 300 x 300 to 4,000 x 4,000 px²¹, up to 10 MB in JPG, JPEG, PNG, WEBP, HEIC or BMP⁹⁰.
• Identifiers: identifier codes are optional per SKU²¹. From 1 November 2026, cross-border sellers on TikTok's Global Selling Platform Open Plan need a seller SKU or a product identifier on goods shipped from outside the EU directly to EU consumers¹⁰⁵.
• Language: content must be in the target market's language or the listing fails²¹.
• Compliance: manufacturer and EU responsible person per category^143,144; in EU markets, model and batch number become mandatory for electrical goods and textiles, with enforcement from 1 October 2026²¹².

• Titles: 150 characters²⁰.
• Description and key features: at least 150 words²⁰; 3 to 10 key features of up to 80 characters²⁰.
• Walmart image requirements: 2,200 x 2,200 px recommended, 1,500 x 1,500 px for zoom, square 1:1²⁷; up to 5 MB in JPEG, JPG, PNG or BMP, no GIF²⁷; seamless white background²⁷; at least 4 images recommended²⁷.
• Identifiers: GTIN, UPC, EAN or ISBN checked against GS1¹⁰⁶; exemption requests are reviewed in up to 3 business days³⁵. Walmart's developer docs also describe requesting an exemption during item setup by sending productId CUSTOM in the item feed; after approval they wait four hours and resubmit¹⁰⁷.
• Language: English only¹⁴⁰.
• Compliance: a California Warning Text field for Prop 65¹⁴⁵.
• Upload: Excel templates up to 5 MB and API feeds of up to 10,000 items per request^189,222. The recommended item spec is version 5.0.20260829-12_49_39-api for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM and OMNI_WFS¹⁹⁸; the older item spec versions page still lists 5.0.20241118²²³. The July 2026 build replaced isCollectible with item_assortment_type and added an optional blind_box attribute²⁰⁷.

The verifiers logged 104 conflicts between pages of the same channel. The dataset keeps all of them. These are the ones most likely to affect a catalog:

• Amazon titles: a sell.amazon.com post from April 2026 still gives a 200-character title limit²²⁴, which predates the 75-character rule. The 200 characters now split into a 75-character item name and 125 characters of Item Highlights²⁴. Amazon's Suppressed listings page still mentions parent titles under 80 characters²²⁵.
• Amazon descriptions and bullets: older Amazon style guides say 2,000 characters⁶⁵, while the schema copies allow 10,000 UTF-8 bytes⁶³. Amazon's editorial pages say five bullets⁷⁷; the schema copies allow 10⁶³.
• Amazon search terms: one help page says under 250 bytes, another says 200 bytes^78,62.
• Amazon legacy feeds: the migration guide ends support on 31 July 2025, while the deprecation table removes 13 feed types on 3 December 2025^171,204.
• Walmart titles: the Product details policy sets 150 characters, while an older SEO guide only warns against titles over 200 characters^20,226. We treat 150 as binding.
• Zalando images: Partner University recommends 1,801 x 2,600 px and the developer docs 1,524 x 2,200 px^26,68. One guide cites a rejection for a packshot background that is not pure white, while the newer image guidelines accept other backgrounds^26,227.
• OTTO images: the onboarding guide allows 1 to 10 images per variant and asks for pure white; the API spec sets no image limit and accepts light neutral backgrounds^12,30,32.
• Kaufland: the video limit is 100 MB in the guideline and 200 MB in the API^5,85. The product data guideline bans machine translations, while Kaufland offers its own free automatic translation^5,113. The energy label attribute page still uses the old A++ to E scale⁵⁵.
• Cdiscount: maximum image size (no limit or 3,000 x 3,000 px), GTIN length (8 to 13 or 8 to 14 digits) and brand length (50 or 30 characters) differ between pages^6,33,228.
• Allegro: the gallery rules say 500 px for the longer side; the thumbnail page says 400 px¹³. The EPR table marks the German battery number as not mandatory, while the battery article requires sellers with battery producer status to give a number per country from 18 August 2025^50,202.
• eBay: ebay.de help allows 250 variants; the Trading API schema allows 120^127,128. Product safety pictograms are capped at 4 in the help pages and 2 in the API text^229,8.
• Meta: the description specification sets a 30-character minimum that the feed specification does not^73,37. An older payouts article still describes checkout on Facebook and Instagram, which Meta's changes article says ended in September 2025¹⁹¹.
• TikTok Shop: Create Product allows 300 SKUs per product in the UK and EU, while an error message in the same document says 100²¹.
• Google: the GTIN help page lists coupon prefix 05 as not allowed; the product data specification does not³⁶.
• bol: bol's partner and supplier pages state 70 characters for titles; a third-party guide reportedly says 250, which bol does not confirm^16,57. The English page on legally required product information gives a 2 September 2026 deadline, while the Dutch page gives 16 September 2026; both take items offline from 16 September 2026^154,211.
• Walmart item spec: the item spec versions page still lists 5.0.20241118, while the versioning and diff reporting page recommends 5.0.20260829-12_49_39-api^223,198.

• Scope: 12 channels. Markets differ per channel: EU stores for Amazon with US differences, NL and BE for bol, ebay.de plus the eBay APIs, UK and EU for TikTok Shop, and the US for Walmart. Etsy, Temu and Mirakl-based marketplaces such as MediaMarkt, Fnac Darty and Decathlon are out of scope for this edition.
• Sources: 386 distinct URLs from seller help centres, partner portals, developer documentation, API references, official changelogs and EU legal texts. Of 925 dataset rows, 898 come from the channel's own documentation or the EU legal text, 11 from official guidance pages and 16 from secondary sources. The secondary rows include third-party copies of Amazon's product type schemas, because the live schemas need seller API credentials. This page cites the subset listed under Sources.
• Primary first: researchers collected rows per channel from the channel's own pages first and used secondary sources only where no official page was found. An independent verifier then re-fetched each source. Rows were kept as verified (726) or corrected against the source (198). The one row that could not be verified is not used on this page.
• Follow-up research added rows on EU energy labels and EPREL, Amazon text and image limits, changes from January 2025 to October 2026, Meta Business Help Center rules and Allegro's BDO number. A final sweep on 17 October 2026 checked the channels' own changelogs and news pages for recent changes.
• Limits of verification: verifiers re-fetched every cited page directly but could not search for newer or unlinked pages in most channels. A verified row matched its page on 17 October 2026; it does not prove that no later page changed the rule.
• Where two official pages of the same channel disagree, both are kept and the conflict is listed under Where sources disagree.
• Refresh: a full re-verification every quarter, plus a check in the month of each date under Dates to watch.