Ceneo Integration: Marketplace API, Comparator & Centralized Sales Management

About Ceneo: Founding, Ownership and Market Position

Founding and Timeline (2005 – Today)

Ceneo.pl was launched in 2005 in Poznań by Tomasz Wieczyński together with a small founding team. The original product was a pure price comparator — buyers searched a SKU, Ceneo aggregated offers from hundreds of Polish e-shops, and merchants paid on a cost-per-click (CPC) basis when shoppers clicked through. By 2009 Ceneo had become Poland's dominant comparator with double-digit million sessions per month.

In the early 2010s, Ceneo was bought by Naspers/Prosus as part of its global classifieds and comparator portfolio. In 2016, Allegro Group acquired Ceneo for approximately $73M after Naspers's exit — folding the comparator into Poland's largest e-commerce group. From 2018 onward, under Allegro ownership, Ceneo pivoted from a pure comparator into a full marketplace where the entire transaction (cart, payment, customer service, returns) happens on Ceneo.pl. Today, Ceneo operates a hybrid CPC bid + marketplace commission model, and shares infrastructure with Allegro — including Allegro One Fulfillment, fraud detection and seller risk scoring.

Ceneo Ownership Structure (2025)

• Allegro.eu S.A. (WSE:ALE) — 100% owner since 2016, listed on the Warsaw Stock Exchange
• Allegro Group — Operational parent; shared logistics, ad-tech, payments (Allegro Pay)
• Naspers / Prosus — Former owner (early 2010s until 2016 divestment)
• Tomasz Wieczyński — Founder; no longer operationally involved
• Public free float on WSE — Indirect via Allegro.eu shares

Position in Polish E-Commerce

Ceneo is the #1 price comparison platform in Poland by both traffic and seller count, and a top-5 marketplace overall. It is particularly dominant in electronics, home appliances and DIY — categories where Polish consumers traditionally research and compare before buying. With Allegro Group as parent and shared infrastructure since 2016, Ceneo effectively gives sellers two distribution surfaces from a single relationship: comparator traffic for price-led shoppers and marketplace transactions for one-click buyers.

Ceneo Sales Volume and Scale (2024–2025 Data)

Since the Allegro acquisition in 2016, Ceneo has steadily converted comparator traffic into marketplace transactions. Combined comparator + marketplace GMV in Poland reached roughly €600M in 2024, with year-over-year growth driven by category expansion into fashion, beauty and home.

Year	PL GMV (EUR)	Monthly Visitors	3P Sellers	Key Milestone
2016	~€90M (CPC)	12M	~25,000 e-shops listed	Allegro acquires Ceneo ($73M)
2018	~€180M	15M	1,500 marketplace sellers	Marketplace launched
2024	~€600M	19M+	8,000+	Allegro One Fulfillment integration
2025 (projected)	~€750M	21M	10,000+	Cross-border CEE expansion

The growth curve is driven by three structural advantages: (1) Ceneo's #1 position in price-led search intent in Poland — most tech shoppers start their journey on Ceneo, (2) shared Allegro infrastructure reducing fulfillment cost per order, and (3) Ceneo Plus B2B subscription giving high-volume merchants enhanced placement and analytics.

Opening a Ceneo Store (2026 Current Rules)

1. Legal and Tax Requirements

To sell on Ceneo Marketplace you need an active business entity registered in Poland or the EU. The most common forms are jednoosobowa działalność gospodarcza (sole proprietorship), sp. z o.o. (limited liability company) or an equivalent EU entity using OSS/IOSS for cross-border. You must be VAT-registered and able to issue structured KSeF invoices, which becomes mandatory for B2B in Poland from February 2026.

• NIP (Polish tax number) or EU VAT-ID for cross-border sellers
• REGON business registration number
• KRS extract (for sp. z o.o. / S.A.) or CEIDG entry (for sole prop.)
• Bank account in PLN (and optionally EUR for cross-border payouts)
• KSeF-compatible e-invoicing via your accounting system or a certified integrator
• JPK_VAT monthly reporting capability (mandated by KAS / Polish tax authority)
• BDO registration for packaging and WEEE waste obligations
• Brand authorization required in restricted categories (cosmetics, infant, electronics with safety regulation)

2. Applying via the Ceneo Seller Portal

Applications are submitted at ceneo.pl/sprzedawaj. Onboarding is operated jointly with Allegro Group's seller risk team, so KYC follows the same standards as Allegro. Approval typically takes 5–10 business days. Once approved you receive a Seller ID, an OAuth 2.0 client ID / secret and access to the developer portal at developers.ceneo.pl — these credentials are what Zunapro uses to authenticate.

3. Product Listings and Content Rules

Ceneo enforces tight catalog standards, especially in electronics where price comparison is decided on exact-match SKUs:

• Title: 60–180 characters, brand + model + key spec (e.g. screen size, capacity)
• EAN / GTIN barcode: strongly required — Ceneo's comparator engine matches offers by EAN; missing barcodes mean missed comparator placements
• Images: White background, minimum 800×800px, up to 8 photos per offer, no watermark or text overlay
• Description: HTML allowed, minimum 200 characters, must include technical specs
• Category mapping: Ceneo taxonomy ID + structured attributes (color, size, capacity, energy class)
• Polish language: Required for PL marketplace; English-only listings will be rejected

Ceneo Commission and CPC Rates (2026)

Ceneo uses a hybrid commercial model that distinguishes it from pure marketplaces like Amazon. For comparator-only listings the merchant pays a CPC bid per click; for marketplace transactions the merchant pays a commission on basket value; many categories combine both. On top of the headline rate, Polish VAT (23% standard, 8% / 5% reduced) is added, and optional Ceneo Plus B2B subscription fees apply. The three bands below summarize the effective take-rate by category:

Net margin formula: Sale price − Commission (or CPC cost) − VAT − Fulfillment fee − Shipping − COGS = Net profit. Zunapro's pricing module runs this calculation per SKU and per category in real time, blocks below-floor pricing and adjusts CPC bids automatically based on click-to-conversion ratios.

Ceneo Marketplace API — Technical Details

The Ceneo Marketplace API is a RESTful interface that lets sellers programmatically synchronize products, offers, stock, prices, orders, shipments and returns with Ceneo's marketplace and comparator engines. Base URL: https://api.ceneo.pl/marketplace/ — full reference at developers.ceneo.pl.

API Authentication

Ceneo uses OAuth 2.0 with the client_credentials grant type. You exchange your client_id and client_secret for a bearer token, which is passed in the Authorization: Bearer <token> header. Tokens expire in 1 hour; Zunapro handles refresh transparently. For sensitive operations (settlement, returns), a tenant-scoped scope must be requested explicitly.

Main Endpoint Groups

• Products API — Create / update offers, match by EAN, query content score and category attributes
• Inventory API — Bulk stock and price sync (up to 100 SKUs per call)
• Orders API — List, filter and update marketplace orders, generate parcels
• Shipments API — Create shipping labels via Allegro One, InPost, DPD Polska, DHL Polska, GLS Polska or Poczta Polska; push tracking numbers back to Ceneo
• Returns API — Accept / reject return requests under Poland's 14-day withdrawal and 2-year rękojmia rules
• Settlements API — Reconciliation reports, commission breakdown, CPC click logs
• Webhooks — Real-time callbacks for new orders, stock changes, return events and content moderation results

Rate Limits and Error Handling

Ceneo enforces a 10 requests/second limit per seller account. Exceeding it returns 429 Too Many Requests. Common errors: 400 (invalid offer payload — usually missing EAN or attribute), 401 (expired or revoked OAuth token), 404 (category or product not found), 409 (offer conflict — same EAN already mapped), 500 (Ceneo upstream — retry with backoff). Zunapro's connector wraps every call with exponential backoff, dead-letter queues and an idempotency layer so retries never duplicate stock decrements.

Ceneo XML / Product Feed Integration

In addition to the REST API, Ceneo supports the legacy XML product feed format used since 2005 for comparator listings. This is the same feed format consumed by Allegro and Google Shopping, so most Polish e-commerce platforms (Shoper, IdoSell, PrestaShop) can produce it natively. Zunapro can either consume your existing feed or generate one on the fly from your storefront.

Ceneo XML Schema (Core Fields)

The minimum required fields for a valid Ceneo feed are:

• offer id — Internal seller SKU
• EAN, producer, name, category (Ceneo taxonomy path)
• price in PLN gross, stock, VAT rate (23/8/5/0)
• url back to product page on seller site (for comparator click-through)
• imgs main + alt (1–8 image URLs)
• desc in Polish (HTML allowed), attrs structured attributes
• delivery shipping options and prices per carrier

Supplier Feed → Ceneo Pipeline

Polish wholesalers and EU distributors typically expose their catalog as XML, CSV or JSON. Zunapro's feed module:

1. Reads the supplier feed on an hourly or daily cron
2. Learns category mapping (manual the first time, then auto-suggested by AI)
3. Translates EN/DE/CS product titles to Polish using a domain-tuned MT layer
4. Normalizes EANs, brand names, energy labels and size attributes
5. Applies your margin rules and Ceneo commission band
6. Decrements stock when the supplier flags out-of-stock — deactivates orphan listings automatically
7. Pushes via API + serves XML feed simultaneously for hybrid CPC/marketplace setups

Allegro One Fulfillment for Ceneo Sellers

Because Ceneo has been part of Allegro Group since 2016, Ceneo Marketplace sellers can plug directly into Allegro One Fulfillment — the same shared logistics network used by Allegro's top sellers. You ship your inventory to an Allegro One warehouse and Ceneo orders are picked, packed and dispatched by Allegro's operations team. It is the Polish equivalent of Amazon FBA, with the added benefit of a single fulfillment pool serving two marketplaces.

Allegro One Fulfillment Benefits

• Next-day delivery across Poland via Allegro One Box, InPost lockers and DPD Polska — boosting Ceneo placement
• "Smart!" badge eligibility on Allegro plus enhanced Ceneo ranking signals
• Customer service handled by Allegro Group — returns, refunds, complaints follow a single SOP
• "Order today, get tomorrow" label — typically lifts conversion 15–25%
• Zero operational overhead — no in-house picking, packing or carrier negotiation

Allegro One Fulfillment Costs (2025 indicative)

• Storage: 70–130 PLN per m³/month
• Pick & pack: 5–10 PLN per order, with bulk discounts above 1,000 orders/month
• Returns processing: 7–13 PLN per return (mandatory under 14-day withdrawal)
• Commission: Standard Ceneo commission + 1–2% fulfillment surcharge

Allegro One Fulfillment becomes cost-effective at 500+ orders per month. Below that threshold, self-fulfillment via InPost or DPD Polska from your own warehouse is typically cheaper.

Ceneo Seller Rating, Cancellation Rates and Ranking Signals

Ceneo assigns every merchant a public 1–5 star seller rating. Because Ceneo is comparator-first, this rating heavily influences whether your offer ranks at the top of a SKU comparison — often even more than price. The factors that move the needle:

• Cancellation rate — Out-of-stock cancellations are the biggest penalty; >2% triggers warnings, >5% risks store suspension
• Late shipments — Orders shipped outside the promised handling window
• Return rate — High in fashion (30%+ acceptable), low expected in electronics (<5%)
• Customer reviews — Aggregate score should stay above 4.5 / 5.0 for top placement
• Response time — Buyer messages must be answered within 24 hours
• CPC bid level — For comparator placements, higher bid moves you up among equal-rated offers

Zunapro's real-time stock sync cuts cancellation risk by ~90%. The moment a unit sells on your storefront or any other channel, Ceneo stock is decremented in 3–5 seconds — eliminating the oversell scenario that destroys ratings.

Ceneo CPC Bidding, Ads and Smart Pricing

Ceneo Ad Surfaces

• CPC comparator bids — Pay-per-click placement in price comparison tables (the original Ceneo model since 2005)
• Sponsored Offers — Top-of-search marketplace placements (CPC, PLN/click)
• Ceneo Plus B2B — Subscription tier with enhanced placement, advanced analytics and dedicated account management
• Brand storefront — Banner and display inventory for brand owners
• Cross-promotion with Allegro — Coordinated campaigns across Allegro Group properties

Smart Pricing (Repricer)

Ceneo's comparator UX surfaces dozens of offers for the same EAN, sorted by total price (including delivery). The buyer's eye goes to the top 3–5 results — so price competitiveness is decisive. Zunapro's repricer adjusts your price every few seconds based on competitor moves, with hard floors at your minimum margin and category-aware logic (e.g. defending Buy Box more aggressively on high-velocity SKUs like the Xiaomi Redmi Smartphone or LG OLED 55 TV).

Ceneo KSeF E-Invoicing and JPK_VAT (Polish Tax Compliance)

From February 2026, structured e-invoicing via the Krajowy System e-Faktur (KSeF) is mandatory for all B2B transactions in Poland. Ceneo marketplace sellers must issue every B2B invoice through KSeF; B2C sales also require electronic invoices or fiscal receipts under JPK_FA rules. Manual invoicing is no longer viable at marketplace scale.

Zunapro's KSeF module:

• Automatically issues a structured KSeF invoice the moment a Ceneo order is confirmed
• Pre-integrated with certified Polish accounting providers (Comarch, Symfonia, iFirma, wFirma, inFakt)
• Generates automatic credit notes (faktura korygująca) on returns
• Monthly JPK_VAT and JPK_FA reporting to KAS
• Sends PDF invoice copies to customers via email + SMS
• GDPR / RODO compliant data retention with UODO-approved audit logs

Ceneo Shipping Integration — InPost, DPD Polska and More

Ceneo orders are typically delivered via Poland's dense parcel and locker network. The default and most-used option is InPost Paczkomat (lockers, 24/7 pickup), followed by DPD Polska, DHL Polska, GLS Polska and the national post Poczta Polska. Sellers using Allegro One Fulfillment also get access to Allegro One Box pickup points at no extra integration cost.

Zunapro's multi-carrier shipping module picks the optimal carrier per parcel based on weight, destination postal code, customer preference and contract rates; it generates the label, prints it, and pushes the tracking number back to Ceneo's Shipments API automatically.

Ceneo Returns and Customer Service (14-Day Withdrawal + Rękojmia)

Polish consumer law guarantees a 14-day right of withdrawal for all online B2C purchases (no reason required) plus a 2-year statutory warranty (rękojmia) for defects. Return rates on Ceneo run around 30–35% in fashion, 5–10% in electronics, and 10–15% in home and garden. Mishandling returns is the fastest way to lose a seller rating.

Ceneo standard return flow:

1. Buyer submits a return request via Ceneo's panel (within 14 days of delivery, no reason required)
2. Buyer drops parcel at an InPost locker (free return for many merchants)
3. Return arrives at Allegro One warehouse or your own depot for inspection
4. Seller approves or rejects within 1–3 business days
5. Refund issued via Allegro Pay or original payment method within 14 days

For defects beyond 14 days, the buyer can file a rękojmia claim for up to 2 years. Zunapro's returns module tracks every stage, issues KSeF credit notes automatically and alerts you when SLA windows are at risk.

Zunapro × Ceneo Integration — 4-Step Setup (10 Minutes)

1. Enter your Ceneo store credentials — In Zunapro's Marketplace → Ceneo tab, paste your Seller ID, OAuth client ID and client secret from developers.ceneo.pl.
2. Connect your storefront — Prebuilt connectors for Shopify, WooCommerce, PrestaShop, IdoSell, Shoper, Magento and BaseLinker; just paste the API URL and access key.
3. Category mapping wizard — Drag-and-drop your storefront categories onto Ceneo's taxonomy. AI suggestions complete most mappings in minutes; the EAN matching engine handles the rest.
4. First sync — Products, stock, prices, orders, shipments — everything starts syncing automatically. Within 10 minutes your Ceneo store is fully manageable from the Zunapro panel.

Ceneo Integration FAQ