Blokker Integration: Marketplace API, Household & Living Omnichannel

About Blokker: Heritage, Ownership and Market Position

Founding and History (1896 – Today)

Blokker was founded in 1896 in Hoorn by Jacob Blokker as a small hardware store (ijzerwaren). Over four generations the Blokker family scaled it into the household-goods benchmark of the Low Countries, opening hundreds of stores across the Netherlands and Belgium during the post-war consumer boom. By the early 2000s "going to the Blokker" was as much a household verb in Dutch as "going to the supermarket".

After a long period of structural pressure from online competition, the Blokker family sold the chain in 2019 to Michiel Witteveen's investment vehicle, which became Mirage Retail Group. Witteveen led a leveraged buyout, divested non-core formats (Big Bazar, Xenos, Leen Bakker) and refocused Blokker on its core household, kitchen and living range — now sold both in 470+ physical stores and on the Blokker.nl marketplace launched in 2020.

Blokker Ownership Structure (2026)

• Mirage Retail Group — 100% owner of Blokker B.V. since the 2019 LBO
• Michiel Witteveen — Controlling shareholder of Mirage Retail Group (private equity)
• Jacob Blokker (1853–1942) — Original founder; family exited operationally in 2019
• HQ — Amsterdam (operational), with regional distribution centres in NL and BE
• Formats — Blokker (full-format), Klein Blokker (urban small-format), Blokker.nl (online + marketplace)

Position in Dutch Household Retail

Blokker is the largest dedicated household-goods retail network in the Netherlands. Industry surveys show more than 80% of Dutch consumers shop at Blokker at least once per year, and 12M+ unique shoppers visit Blokker stores and Blokker.nl annually. While Bol.com dominates Dutch generalist e-commerce and Coolblue leads electronics, Blokker remains the category specialist for cookware, cleaning, laundry, small household and living — a niche where Mirage Retail Group is doubling down with the 2024 restructuring and store-network rationalisation.

Blokker Market Size and Growth (2024–2025 Data)

Blokker entered a deliberate restructuring phase in 2024 under Mirage Retail Group: store-network rationalisation, financial recapitalisation and an aggressive push of the Blokker.nl marketplace as a third growth engine alongside retail and own-label e-commerce. Marketplace GMV is the fastest-growing line, and 1.2K+ third-party sellers are already onboarded.

Year	NL GMV (Total)	Stores NL+BE	Annual Shoppers	3P Sellers
2020	~€650M	520+	11M	120
2022	~€700M	500+	11.5M	650
2024	~€750M+	470+	12M+	1.2K+
2025 (forecast)	~€800M	440+	12.5M	1.8K

The interesting dynamic for sellers: as the physical footprint slims, Blokker's omnichannel mix shifts toward marketplace + Click&Collect. Listing on Blokker.nl gives a household-goods brand the credibility of a 130-year retail name with the unit-economics of pure 3P. Joining Blokker Marketplace is one of the cleanest specialist routes into Dutch household e-commerce.

How to Open a Blokker Marketplace Shop (2026 Rules)

1. Legal and Financial Requirements

To sell on Blokker you need a registered EU business with an active BTW (VAT) number. Dutch sole proprietors (eenmanszaak), BV and EU-registered companies are accepted; the seller contract is signed with Blokker B.V. (Mirage Retail Group).

• KvK (Chamber of Commerce) extract — current year
• BTW number — Belastingdienst registration, valid in VIES
• IBAN bank account — payouts are made in EUR to this account
• Peppol participant ID — required for structured UBL invoicing
• GTIN/EAN barcodes — mandatory on every SKU
• CE / REACH / WEEE compliance — for electronics, cookware, toys and chemicals
• Brand authorisation — required for selected protected brands (Philips, Tefal, Eufy, etc.)

2. Apply via verkopen.blokker.nl

Submit your seller application at verkopen.blokker.nl. Approval typically takes 14 to 28 days depending on category and brand checks. Once approved, the Blokker Marketplace team issues your seller ID and an OAuth 2.0 client_id / client_secret pair on developers.blokker.nl — these credentials are everything you need to connect Zunapro.

3. Listing Quality and Content Rules

Blokker enforces strict household-retail content standards (Mirage Retail Group treats the marketplace as an extension of its physical brand):

• Title: 60–150 characters, brand + product + key spec (size, capacity, wattage)
• Imagery: white background, 1000×1000 px minimum, up to 8 photos, no watermarks
• Description: HTML-light, minimum 250 characters, Dutch translation strongly recommended
• Category mapping: Blokker category ID + required attributes (material, capacity, dimensions)
• GTIN/EAN: mandatory; without it the listing is rejected at validation
• Content score: must be 80+ or the SKU is held in "draft" status

Blokker Commission Rates (2026)

Blokker commission ranges from 6% to 20% depending on category. 21% Dutch BTW is added to the commission on the seller invoice (reverse-charged where applicable). Below is the practical three-band breakdown Mirage Retail Group uses internally for household assortment:

Net margin formula: sale price − category commission − 21% BTW on commission − Peppol/payout fees − carrier cost − COGS = net margin. The Zunapro pricing module runs this per SKU and per channel, blocking any push that would land below your minimum-margin threshold.

Blokker Marketplace API — Technical Details

The Blokker Marketplace API is a RESTful interface exposed by Mirage Retail Group's commerce platform. Base URL: https://api.blokker.nl/marketplace/. Official documentation lives on developers.blokker.nl.

Authentication

Blokker uses OAuth 2.0 client credentials. You exchange your client_id and client_secret for a bearer access token (typical TTL: 60 minutes) and send it on every request as Authorization: Bearer <token>. Token refresh is handled by Zunapro transparently — sellers never see a 401.

Main Endpoint Groups

• Catalog API — create / update offers, map to Blokker category tree, attribute validation
• Inventory & Pricing API — bulk stock and price updates (batched, max 100 SKUs per request)
• Orders API — list orders, acknowledge, mark shipped, cancel
• Shipments API — register PostNL / DHL Parcel / DPD NL tracking numbers
• Returns API — process the mandatory 14-day Dutch consumer withdrawal flow
• Settlements API — payout statements, commission breakdowns, BTW lines
• Webhooks — real-time push for new orders, returns, stock alerts and content-score events

Rate Limits and Error Handling

Per-client rate limits apply on the Blokker Marketplace API; bulk endpoints accept up to 100 SKUs per call. Common responses: 400 (invalid attribute), 401 (expired token), 404 (unknown SKU or category), 429 (rate-limit), 500 (upstream). The Zunapro connector wraps every call with exponential backoff, idempotency keys and a dead-letter queue so retries never duplicate orders or stock writes.

470+ Store Click&Collect — Blokker's Unique Omnichannel Edge

Where Bol.com is a pure e-commerce play, Blokker's defining advantage is its 470+ physical store network across the Netherlands and Belgium. For Marketplace sellers this translates into three concrete revenue levers that no other Dutch marketplace can match:

• Click&Collect at 470+ stores — shoppers pick up the same day at their local Blokker; conversion on the product page jumps 12–18%
• Klein Blokker urban pick-up — the small-format chain covers Amsterdam, Rotterdam, Utrecht and Den Haag city centres where home delivery is harder
• Blokker Bezorgservice — in-house last-mile for bulky household items (vacuums, ironing boards, small furniture) that PostNL won't carry cost-effectively

If your assortment maps to household, cleaning, laundry, cookware or small living, listing on Blokker is the cheapest way to get a physical retail brand halo without renting a single square metre. The Zunapro panel exposes Click&Collect inventory as a separate stock pool per store cluster.

Blokker Fulfilment — 3PL + In-Store Network

Blokker does not yet run an Amazon FBA-style fulfilment service for marketplace partners; instead, the network of 470+ stores plus contracted 3PL warehouses acts as a hybrid fulfilment backbone. As a 3P seller you have three operating models:

Self-Fulfilment (FBM)

• You hold stock and ship from your own warehouse
• Carrier of choice: PostNL (default), DHL Parcel, DPD NL
• SLA: cut-off 16:00, next-day delivery for 99% of NL postcodes
• Returns are routed back to your warehouse via Blokker's RMA flow

3PL Fulfilment

• Blokker-certified 3PL partners handle pick, pack and ship
• Recommended for sellers above ~500 orders / month
• Same SLA as self-fulfilment but with redundancy and SLA penalties

Click&Collect via Blokker Stores

• Customer picks up at any of the 470+ Blokker / Klein Blokker stores
• Free for the shopper; lower carrier cost for the seller
• Drives in-store footfall — Mirage Retail Group's strategic priority

Seller Score, Cancellations and SLA

Blokker rates every seller on a 1–10 score that directly influences listing visibility and Click&Collect eligibility. The drivers are well-defined:

• Cancellation rate — out-of-stock cancels are the biggest penalty; above 2% triggers a warning, above 5% risks suspension
• Late shipment rate — orders not shipped by promised cut-off
• Return rate — Dutch consumers have a statutory 14-day withdrawal right; abnormal return rates lower the score
• Customer rating — must stay above 4.0 / 5
• Response time — messages must be answered within 24 working hours

Zunapro real-time stock sync cuts cancellation risk by ~90%: the moment a unit sells on your webshop, Bol.com or another connected channel, Blokker is updated within 3–5 seconds.

Blokker Advertising and Smart Pricing

Blokker Ad Formats

• Sponsored Products — top placement in Blokker.nl search results (CPC-based, EUR/click)
• Category sponsorship — homepage and category-page banners for household, kitchen and living
• Seasonal campaigns — Sinterklaas, Black Friday, Christmas, Voorjaarsschoonmaak (spring cleaning) — Blokker's strongest commercial moments
• In-store endcap pairing — selected Marketplace winners are featured in physical stores (premium, invite-only)

Repricer for Buy Box Wins

Blokker's product detail page shows a single offer at any time; multi-seller competition is decided by price, content score, seller score and fulfilment speed. The Zunapro repricer re-prices SKUs against competing offers within seconds and never crosses your minimum-margin floor.

Peppol E-Invoicing and BTW Compliance (Belastingdienst)

Selling in the Netherlands means complying with strict invoicing and tax rules. 21% BTW applies to most household categories; 9% BTW applies to selected food and drinks. Mirage Retail Group expects Peppol UBL structured invoices for all B2B settlements and refunds — manual PDF invoicing is not accepted at scale.

The Zunapro e-invoicing module:

• Generates a BTW-compliant invoice the instant a Blokker order ships
• Sends Peppol UBL to Mirage Retail Group and a PDF to the consumer
• Handles refund credit notes automatically inside the 14-day withdrawal window
• Produces monthly BTW returns ready for the Belastingdienst portal
• Stores invoices 7 years per Dutch fiscal law, GDPR/AVG compliant under AP supervision

Blokker Shipping — PostNL, DHL Parcel, DPD NL, Bezorgservice

Marketplace orders ship by default via PostNL (the Dutch national carrier with the widest pick-up point network). DHL Parcel and DPD NL are accepted for next-day and oversized parcels. For bulky household goods Blokker offers its in-house Blokker Bezorgservice last-mile, which couriers items the parcel carriers can't or won't.

Zunapro's multi-carrier module selects the best carrier per order based on weight, postcode, value and SLA; it prints labels, registers the tracking number with the Blokker Marketplace API and emails the consumer in Dutch or English.

Returns, Withdrawal Right and Customer Service

Dutch consumer law guarantees a 14-day right of withdrawal (herroepingsrecht) on online purchases plus a 2-year statutory warranty. Mirage Retail Group enforces both rigorously — failing returns SLA quickly lowers your seller score.

Standard Blokker return flow:

1. Consumer opens a return on Blokker.nl within 14 days of delivery
2. Blokker issues a PostNL return label, free for the consumer (you may bear the cost)
3. Parcel is routed to your warehouse or a 3PL receiving site
4. You inspect and approve / reject within 1–3 business days
5. Blokker refunds the consumer via the original payment method; you receive a credit note

Zunapro returns module tracks every step, issues the Peppol credit note automatically and updates Belastingdienst-ready BTW reports — no spreadsheet acrobatics.

Setting Up Blokker Integration with Zunapro — 4 Steps (10 Minutes)

1. Paste your Blokker credentials — In the Zunapro panel go to Marketplace → Blokker and paste the OAuth 2.0 client_id / client_secret issued by developers.blokker.nl, plus your seller ID.
2. Connect your storefront — Native connectors for Shopify, WooCommerce, Magento, Lightspeed, Prestashop and custom REST APIs. Paste your API URL + access key.
3. Run the category mapping wizard — Drag-and-drop your categories onto the Blokker tree (Household, Kitchen, Cleaning, Living, Bedroom, Laundry, Food & Drinks). AI suggestions finish the long tail in minutes.
4. First sync — Products, stock, prices, orders and shipments start syncing automatically. Within 10 minutes you manage your Blokker shop from the Zunapro panel.

Frequently Asked Questions About Blokker Integration