Public Marketplace Integration: API, Books+Tech+Culture & Public Plus

About Public: Heritage, Ownership and Market Position

Founding and 40 Years of History (1985 – Today)

Public opened its first store in Athens in 1985, founded by entrepreneur Andreas Lambrou as a cultural retail destination focused on books, music (CDs and vinyl), video and gaming. Throughout the 1990s and 2000s the brand became Greece's most recognised cultural institution — every major Athens, Thessaloniki and regional shopping district had a Public store. From 2010 onwards the assortment expanded aggressively into consumer tech, IT, mobile, photography and small home appliances, repositioning Public as a true cross-category department chain.

In 2014, Olympia Group — the investment vehicle of Greek-Cypriot industrialist George David — acquired Public Group, providing the capital base for its next growth chapter. In 2018, Public absorbed MediaMarkt Greece after the German chain's exit from the Greek market, consolidating tech and electronics retail under a single banner. In 2020, Public launched its Mirakl-powered third-party marketplace, opening its 60-store footprint, 1.5M loyalty base and brand authority to independent Greek and EU sellers.

Public Group Ownership Structure (2026)

• Olympia Group — Majority owner since 2014 (George David's holding)
• Public Group — Operating entity (Public retail + Public.gr + marketplace)
• MediaMarkt Greece — Acquired and integrated in 2018, fully merged into Public's tech operation
• Andreas Lambrou — Founder, cultural legacy and brand custodian
• George David — Beneficial owner via Olympia Group; portfolio also includes Sunlight Group, Westnet and other Greek champions

Public's Position in Greek Retail and E-Commerce

Public is the undisputed leader of Greek cultural retail — books, music and vinyl — with an estimated 30%+ share of the Greek online book market. In tech, gaming and mobile it competes head-to-head with Kotsovolos, Plaisio and You.gr. With 60+ physical stores, 1.5M+ Public Plus loyalty members and roughly €600M Greece GMV in 2024 across own retail and marketplace, Public is the single most powerful omnichannel surface for sellers targeting Greek consumers.

Public Marketplace Volume and Scale (2024–2025 Data)

Public sits at the intersection of cultural retail authority and tech retail scale. Marketplace GMV grew rapidly after the 2020 launch as Greek and EU sellers plugged into the Mirakl-based platform.

Year	Greece GMV (EUR)	Public Plus Members	3P Sellers	Retail Stores
2020 (MP launch)	~€280M	700K	~150	50+
2022	~€420M	1.1M	~1,100	55+
2024	~€600M	1.5M+	2K+	60+
2025 (forecast)	~€700M	1.7M	2.5K	62+

The growth engine is the unique Click&Collect across 60+ Public stores, the Public Plus loyalty programme driving repeat purchase, and the marketplace's Mirakl-grade catalogue tooling. Joining Public's marketplace is the fastest route to cultural-credibility distribution in Greece.

Opening a Public Marketplace Store (2026 Rules)

1. Legal and Fiscal Requirements

To sell on Public.gr you need a Greek VAT-registered legal entity or an EU entity with a Greek VAT number, AADE tax authority registration, and a myDATA-compliant electronic invoicing setup. Public enforces standard EU consumer law including 14-day right of withdrawal and 2-year legal warranty.

• Greek VAT number (AFM) — mandatory; EU sellers register via OSS or local VAT representation
• Legal entity — atomiki epicheirisi, IKE, EPE or AE (or equivalent EU form)
• AADE registration — Greek tax authority profile
• myDATA e-invoicing — mandatory in Greece; integration via certified providers (Epsilon, SoftOne, Entersoft, Singular)
• IBAN bank account — for marketplace settlements in EUR (€)
• Brand authorisation — required for branded electronics, beauty and toys
• WEEE / REACH / CE compliance — for electronics, batteries and chemical products

2. Applying via marketplace.public.gr

Submit your seller application at marketplace.public.gr. Approval typically takes 14–21 days while Public's vendor management team validates AFM, AADE status, catalogue quality and category fit. Once approved you receive your Seller ID, OAuth 2.0 client credentials (client_id, client_secret) and a sandbox environment for end-to-end testing before going live.

📥 Official Public Marketplace Seller Registration marketplace.public.gr — free registration, 14–21 business days approval →

3. Catalogue and Content Rules

Public runs on Mirakl, which enforces strict catalogue quality before offers go live:

• Title: 50–150 characters, brand + product name + key attribute
• Images: white background, minimum 1000×1000px, up to 8 photos, no watermarks or text overlays
• Description: HTML supported, minimum 250 characters in Greek (English optional for tech)
• Category mapping: Public/Mirakl category ID + attributes (author/ISBN for books, GTIN/EAN for tech, model + year + spec sheet for electronics)
• Barcode (ISBN / EAN / GTIN): mandatory for books and tech — strong catalogue matching
• Content score: must reach 80+ before the offer appears on Public.gr

Public Marketplace Commission Rates (2026)

Public commission rates run from roughly 6% to 20% by category, on top of 24% standard VAT (13% reduced, 6% super-reduced for books and some media). Books, music and vinyl — Public's historic strength — sit in the lowest band. Below are the three core commission bands:

Net margin formula: Sale price − Commission − VAT − Marketplace fees − Shipping − COGS = Net profit. Zunapro's pricing module calculates this per SKU and per category in real time, preventing listings that fall below your minimum margin floor.

Public Marketplace API Integration — Technical Details

The Public Marketplace API is a Mirakl-based RESTful interface that lets sellers programmatically sync catalogue, offers, stock, prices, orders, shipments and refunds. Base URL: https://api.public.gr/marketplace/

API Authentication

The Public Marketplace API uses OAuth 2.0 with a client_credentials grant. Exchange your client_id and client_secret for a short-lived bearer token sent as Authorization: Bearer <token>. Tokens typically expire after 1 hour and should be refreshed automatically. Sandbox and production environments are separated for safe testing.

Main Endpoint Categories

• Products / Catalog API — create offers, map to Mirakl categories, manage attributes, check content score
• Offers API — price and stock synchronisation (bulk endpoint up to 100 SKUs/request)
• Orders API — list orders, accept/reject, update status, mark as shipped
• Shipments API — generate ACS Courier / Geniki Taxydromiki / Speedex labels, push tracking numbers
• Refunds & Claims API — handle 14-day withdrawal and 2-year warranty returns
• Invoices / Settlements API — payouts, marketplace fees, reconciliation against myDATA
• Webhooks — live callbacks on order, stock and offer events

Rate Limits and Error Handling

The Public Marketplace API enforces roughly 10 requests per second per seller. Exceeding the limit returns 429 Too Many Requests. Common error codes: 400 (invalid offer payload), 401 (expired bearer token), 404 (unknown category or SKU), 500 (Mirakl backend error — retry). Zunapro's Public connector handles authentication refresh, exponential-backoff retries, dead-letter queues and webhook dispatch automatically.

Public Product Feed Integration — Bulk Catalogue Upload

Public product feed integration automatically reads your supplier or storefront XML/CSV catalogue and pushes it into the Mirakl-based Public marketplace as offers. It replaces manual SKU-by-SKU entry and lets you load thousands of products in minutes.

Feed Schema (Public / Mirakl-compatible)

Core fields required for a Public-ready feed:

• product-id — primary SKU identifier (groups variants)
• brand, title, product-code, sku, ean, isbn
• category-code (Public/Mirakl category), attributes (author, language, format for books; spec, colour, capacity for tech)
• quantity (stock), price, list-price, vat-rate (24%/13%/6%)
• logistic-class, shipping-origin
• images (1–8 URLs), description (HTML, Greek)

From Supplier Feed to Public Offers

Most Greek and EU distributors of books, music, gaming and consumer tech publish XML or CSV catalogues. The Zunapro feed module:

1. Pulls the supplier feed URL on an hourly or daily cron
2. Learns the category mapping (manual first pass, automated thereafter)
3. Normalises brand, language, format and spec attributes
4. Applies margin and category commission to compute the listing price
5. Tracks supplier stock — auto-deactivates SKUs that go out of stock upstream
6. Pushes offers to the Public Marketplace API

Public Fulfilment — Click&Collect Across 60+ Stores

Public's logistics edge is its 60+ store retail footprint — Greece's largest cultural retail network. Marketplace sellers can pair last-mile courier delivery with Click&Collect at any Public store, a feature no other Greek marketplace can match at this scale.

Public Fulfilment Advantages

• Click&Collect at 60+ stores — boosts conversion by 12–18% vs courier-only delivery
• Higher Buy Box probability — Click&Collect badge ranks above courier-only offers
• Customer service handled by Public — in-store pickup, exchanges, returns at any branch
• "Pick up tomorrow from your Public store" labels — strong urgency CTAs at checkout
• 3PL options — Public partners with multiple 3PL providers across Attica and Thessaloniki for marketplace sellers without own warehousing

Approximate 2025 3PL Costs

• Storage: €8–15 per m³/month
• Order processing: €1.20–€2.50 per SKU picked
• Returns handling: €2–€4 per return
• Marketplace fee: standard Public commission + 1–2% fulfilment surcharge if using Public-managed 3PL

Click&Collect and 3PL become cost-effective once you exceed roughly 300 monthly orders. Lower-volume sellers can keep shipping from their own warehouse via ACS Courier or Geniki Taxydromiki.

Public Seller Rating, Cancellation and Returns

Public ranks every seller on a 1–5 rating that directly drives Buy Box and search visibility. Key factors that hurt the rating:

• Cancellation rate — out-of-stock cancellations are penalised hardest; above 2% triggers a warning, above 5% risks account suspension
• Late shipment — orders not handed to ACS Courier / Geniki Taxydromiki / Speedex within the SLA
• Return rate — above-category-average returns hurt ranking (cultural categories are naturally low at 3–6%, tech around 5–10%)
• Review score — keep your offer rating above 4.5 stars
• Response time — message responses within 24 hours expected

Zunapro's real-time stock sync reduces cancellation risk by ~90% — the moment a unit sells on your storefront, on Skroutz or elsewhere, the Public offer is decremented or paused.

Public Ads, Promotions and Smart Pricing

Public Advertising Surfaces

• Sponsored Products — top placements on search results (CPC model, EUR/click)
• Public Plus targeted offers — push promotions to 1.5M+ loyalty members
• Category banner / display — for brand sellers running seasonal campaigns
• Click&Collect promotions — discount or free-collect campaigns tied to the 60-store network

Smart Pricing (Repricer)

The Buy Box on Public is competitive — when 5+ sellers list the same SKU, the algorithm weights price, seller rating, on-time shipping and Click&Collect availability. Zunapro's repricer module adjusts prices against competitors within seconds while respecting your minimum margin floor and category commission.

Public myDATA E-Invoicing and AADE Compliance

Every Greek seller is required by AADE to issue electronic invoices through the myDATA platform — both B2C receipts and B2B invoices must be transmitted in real time to the tax authority. Manual invoicing is unworkable beyond ~50 orders per day.

The Zunapro myDATA module:

• Issues a myDATA-compliant receipt or invoice automatically as soon as a Public order arrives
• Integrates with AADE-certified providers (Epsilon Net, SoftOne, Entersoft, Singular Logic)
• Generates credit notes automatically on returns and refunds
• Produces monthly VAT (24% / 13% / 6%) reports for your accountant
• Emails / SMSes the PDF receipt to the customer
• Maintains GDPR / HDPA-compliant data residency and audit trails

Public Shipping Integration — ACS Courier & Greek Couriers

Public marketplace orders ship via Greece's full courier stack. ACS Courier is the primary marketplace partner; Geniki Taxydromiki, ELTA (Hellenic Post), Speedex and BoxNow (locker network) are also fully supported. Click&Collect to any of the 60+ Public stores is offered as a free alternative at checkout.

Zunapro's multi-courier module selects the optimal carrier per order based on weight, destination postcode (mainland vs island), service level and customer preference — printing labels, pushing tracking numbers to Public and notifying the buyer automatically.

Public Returns and Customer Service Management

Greek consumer law mandates a 14-day right of withdrawal and a 2-year legal warranty. Typical return rates are 3–6% in books and music, 5–10% in tech and gaming, and 10–15% in toys and lifestyle. Mishandled returns sink your seller rating quickly.

Standard Public Return Flow:

1. Customer opens a return on Public.gr (within 14 days of delivery)
2. The buyer drops the parcel at any Public store or schedules ACS Courier pickup
3. The seller is notified via API and receives the item back within 1–4 business days
4. Seller approves or rejects the return within 1–3 business days
5. On approval, Public refunds the customer to original payment method or Public Plus wallet

Zunapro's returns module tracks every step, alerts your team, auto-generates the credit note and pushes it to myDATA.

Zunapro × Public Integration — 4 Steps (10 Minutes)

1. Enter your Public seller credentials — In the Zunapro panel go to Marketplace → Public and enter your Seller ID, OAuth client_id and client_secret.
2. Connect your storefront — Pre-built connectors for Shopify, WooCommerce, OpenCart, Magento, PrestaShop and custom REST APIs. Enter the storefront URL + access key.
3. Category mapping wizard — Drag-and-drop map your categories to Public's Mirakl taxonomy. AI suggestions complete the mapping in minutes; ISBN/EAN attribute mapping is automatic.
4. First sync — Catalogue, stock, prices, orders, Click&Collect and shipments start syncing automatically. Within 10 minutes you're operating your Public store entirely from the Zunapro panel.

Public Marketplace Integration — Frequently Asked Questions