Mountain Warehouse: marketplace guide

About this guide

This is a ChannelEngine guide on the London-based marketplace Mountain Warehouse. Here you can find information on how to request a Mountain Warehouse account, how to configure this marketplace on ChannelEngine, what the specific requirements are, and more.

Table of contents

Commercial information

How to request an account

Associated costs

Marketplace features

Settings and configuration

Marketplace-specific requirements and exceptions

• Setup
• Mappings
• Pricing
• Listed products

FAQs

Commercial information

Founded	August 1997
Founder	Mark Neale
Headquarters	London, United Kingdom
Area served	United Kingdom
Number of monthly visits	circa 4 million
Website	mountainwarehouse.com
Setup cost	none
Commission	10-20%
Other costs	GBP 30.00/month
Payment	twice/month
Product categories	accessories, apparel, crafts, fashion, games, garden, outdoor recreation, pets, toys,  sports
Input language	English
Input currency	GBP
Content creation	yes
Minimum number of SKUs	no
Advertisement options	no
Profile on ChannelEngine	Mountain Warehouse

How to request an account

To start selling on Mountain Warehouse, contact them via email. The requirements are:

• Business entity registered in the United Kingdom
• VAT number registered in the United Kingdom
• Warehouse located in the United Kingdom

Associated costs

Mountain Warehouse does not charge a setup fee. However, it does charge a monthly fee of GBP 30.00 and a commission on sales – which ranges between 10-20%, depending on the product category.

Marketplace features

Supported	Not supported
Product content	Automatic variations
Product offers	Bundles
Orders	Sales channels*
Shipments	Refurbished products
Cancelations (merchant)	Repricing
Returns (merchant)	Cancelations (marketplace)
Carrier mapping	Returns (marketplace)
Product variations (size/color)	Marketplace fulfillment service
Multiple stock locations	HTML formatting

* A marketplace that supports sales channels allows merchants to list and sell products across multiple markets (e.g.: countries, regions, and states), all from the same connection.

Settings and configuration

Setting up each channel on ChannelEngine follows the same flow, though not every channel includes the steps listed below.

1. Go through the Setup.
2. Create a Product selection.
3. Complete the Categorization.
4. Set up the Mappings: content, offers, and carriers.
5. Configure the Pricing: rules and currency conversion.
6. Fill in the Stock settings.
7. Finish the Activation.
8. Check the Listed products overview.

Marketplace-specific requirements and exceptions

Setup

On ChannelEngine

Mountain Warehouse is a Mirakl-based marketplace, so you can connect it with ChannelEngine using a Mirakl Connect SSO account. For more information on this, check out the Mirakl-based channels: SSO authorization article.

• Enable invoice uploading - to configure your invoice settings, choose one of the following options:
  • ChannelEngine invoices - when ChannelEngine receives a shipment, ChannelEngine automatically generates an invoice and exports it with the shipment. To make use of this option, make sure you set up the correct VAT calculation and invoice template on ChannelEngine.
  • Merchant invoices - when ChannelEngine receives a shipment, it exports the shipment with an invoice that you previously uploaded to ChannelEngine. Upload a merchant invoice to ChannelEngine either via the Merchant API or the web interface. 
  • None - when ChannelEngine receives a shipment, it takes no action other than notifying you that no invoice is present.

Mappings

Content

All products (required)

• Brand - the product's brand or manufacturer. If your brand is not listed, contact Mountain Warehouse to have it added.
• Color category - the color family closest to the product's color, used to filter products accordingly.
• Color/option name - the product's exact color or pattern. The maximum character count is 30 characters. E.g.: sparkly red.
• Description - the product's detailed description. Descriptions begin with a paragraph followed by bullet points. The requirements are:
  • Paragraph
    • Summary of the product.
    • Product's special qualities and intended uses.
    • Sentence case, correct grammar, and proper spelling.
    • Body-positive and inclusive language.
  • Bullet points
    • Key features and technical specifications. E.g.: dimensions, size, capacity, and material.
    • Line break before bullet points separating them from the paragraph.
    • Each bullet point starts with a bullet ( • ) symbol, and is on a separate line.
• Image 02 - the product's additional image. The requirements are:
  • Height - at least 1,500 px.
  • Width - at least 1,000 px.
  • Aspect ratio - 2:3.
  • File format - JPG.
• Main image - the product's main image. The requirements are:
  • Height - 1,500-3,000 px.
  • Width - 1,000-2,500 px.
  • Aspect ratio - 2:3; portrait format.
  • File format - JPG.
• Material composition - the product's material composition, formatted as [Outer/Inner]:[percentage] [Material]. Use a comma ( , ) to separate multiple materials. E.g.: Outer: 60% Cotton, 40% Polyester; Inner: 96% Polyamide, 4% Elastane.
• Parent product ID - the unique identifier of the parent product, which is used to group product variations (size or color). If your product does not have variations, enter its Merchant product number.
• Product title - the product's title. The requirements are:
  • Structure - [Name] [Gender] [Attribute] [Intended use] [Product]. Title case. E.g.: Nitro Women's Waterproof Hiking Boots. 
  • Character count - up to 50 characters.
  • Same product title for all variations.
  • Key words to optimize SEO. E.g.: waterproof, organic cotton.
  • No color or size information.
  • No commercial information. E.g.: great deal, best price.
• Seller SKU - the internal product reference, known as Merchant product number on ChannelEngine.

All products (optional)

• Country of origin - the country where the product was manufactured.
• Image 03-10 - the product's additional images. For image requirements, check out Image 02.
• Intended uses - the product's intended use, such as the related sport or activity.
• Item height (cm) - the product's height in cm.
• Item length (cm) - the product's length in cm.
• Item weight (kg) - the product's weight in kg.
• Item width (cm) - the product's width in cm.
• Packed height (cm) - the packaged product's height in cm.
• Packed length (cm) - the packaged product's length in cm.
• Packed weight (kg) - the packaged product's weight in kg.
• Packed Width (cm) - the packaged product's width in cm.
• Primary color swatch - the HEX color code of the product's primary color.
• Secondary color swatch - the HEX color code of the product's secondary color.
• Secondary product identifier - the product's additional barcode. 
• Sustainability features -  the product's sustainability characteristics. 
• Wash care instructions - the product's washing instructions.

Offer

Required

• Price - the product's selling price.
• Product identifier - the product's 13-digit barcode, such as its EAN or UPC.

Optional

The following offer attributes are common to some Mirakl-based marketplaces:

• ECO #1-5 amount - the amount due for the eco-contribution related to the product. E.g.: 2.50.
• ECO #1-5 EPR category code - the extended producer responsibility (EPR) code that applies to the product. For a list of category codes, check out the article Providing data to comply with circular economy regulations in Mirakl's help center (note that you need to be logged in to Mirakl to access this page). E.g.: DE-WEEE, FR-DEA, etc.
• ECO #1-5 producer ID - your producer ID, received upon registering with a packaging register, such as Germany's LUCID. The maximum number of characters is 255.
• Category-specific ECO attributes - depending on your sales country, you might be required to map additional ECO attributes for products in specific categories. Review which ECO attributes to map within each category.

If pricing v2 is activated in your environment, you will see the following offer attributes, which are common to all Mirakl-based marketplaces:

• Allow promotion below min price - set it to ‘true’ to allow the promotion price to drop below your product's minimum price. To learn more, check out the article ChannelEngine: promotions.
• Strike price - the regular selling price. Use it in combination with the Price attribute to set up a discount/strikethrough pricing. To learn more, check out the 'Working with discounts' section of this article. 
• Additionally, the Fee groups attribute appears in Mappings, Fee group mappings, if pricing v2 is activated. Map the marketplace fee group ID of the product there.  

The following offer attributes are also common to all Mirakl-based marketplaces:

• Discount start date - the date from which the product's sale price is valid, if applicable. Input the date as a fixed value. The date format is YYYY-MM-DD HH:MM:SS ZZ. All dates follow American month-day formatting, and all times follow 24-hour formatting in the UTC timezone. E.g.: 2026-10-25 15:30:00 +01 will start your discount on 25 October 2026 at 3:30 PM, one hour ahead of UTC time.
• Discount end date - the date until which the product's sale price is valid, if applicable. Input the date as a fixed value. The date format is YYYY-MM-DD HH:MM:SS ZZ. All dates follow American month-day formatting, and all times follow 24-hour formatting in the UTC timezone. E.g.: 2026-10-30 23:59:59 +01 will end your discount on 30 October 2026 at 11:59 PM and 59 seconds, one hour ahead of UTC time.
• Discount price - the product's sale price, if applicable. This attribute must have a lower value than the Price attribute. This attribute only applies if you use pricing v1.
• Discount quantity threshold - the minimum quantity required for the discount rate to be available.
• Leadtime to shipment - the number of days before you ship the product. You can create your own unique rules, if applicable. For more information on this, check out the article Lead time to ship in Mirakl's help center.
• Minimum quantity alert - map this attribute to receive a notification from Mirakl if your stock drops below the threshold defined.
• Offer state - the product's condition. Find your option from the dropdown menu by selecting the fixed value to apply to all.
• Product tax code - the taxation code applicable to the product.
• Logistic class - your optional shipping class. Make sure to map the shipping class using the marketplace’s codes and not with the labels that are visible in the partner portal's user interface. These codes vary per marketplace. If this marketplace makes use of logistic class codes, they can be found below.

Code	Label	Description
S	Small	Small packages of less than 2 kg. Dimensions: 61x46x46 (LxWxD).
M	Medium	Medium packages of less than 20 kg. Dimensions: 61x46x46 cm (LxWxD).
L	Large	Large packages of less than 30 kg, and less than 150 cm (L).
OVS	Oversize	Oversized or bulky items of more than 30 kg; or those requiring two-man deliveries.
SP	Specialist	Specialist deliveries that may require additional precautions. E.g.: gas, batteries, jewelry, etc.

Working with discounts

These instructions apply to most Mirakl marketplaces. If there are any exceptions on this marketplace, these are noted below. 

Pricing v1

• To set up a discount, map the Discount price, Discount start date, and Discount end date attributes. If you want to set a permanent discount, map the Discount end date attribute with a date in the far future instead of leaving it unmapped. Otherwise, the offer is not exported, and errors are shown on the Validation and feedback tab.
• The discounted price is only exported if it is lower than the base price.
• If you do not want to set a bulk discount, leave the Discount quantity threshold attribute unmapped.
• To set a bulk discount, the Discount quantity threshold must be set to a value higher than 1. For example, a value of 2 indicates that the buyer must purchase two or more products at the same time to benefit from the discount.

Pricing v2

• To set up a discount, in the Offer mappings step, map the Strike price attribute to your regular price. Then, map the Discount start date and Discount end date attributes to indicate the start and end dates of your discount.
• If you do not want to set a bulk discount, leave the Discount quantity threshold attribute unmapped. To learn how to set up a bulk discount, check out Bulk discounts.
• In the Pricing step, go to Price rules. Map the Price attribute to the discounted price. Both Min. price and Base price fields must be mapped. Note that ChannelEngine exports the higher of the two values – typically the Base price. To learn more, check out ChannelEngine: price rules v2.
• The Price and Strike price attributes cannot be mapped with the same value. ChannelEngine only sets a discount if the value in Price (Base price) is lower than the value in Strike price.
• If set up correctly, your product displays a discount label and a strikethrough price on the channel.

Carrier

Carrier mapping is not required on Mountain Warehouse. However, you can map your carrier to a specific list of carriers maintained by Mountain Warehouse. This allows for working tracking codes in the back-end, as well as for the buyer. If your default carrier is missing, contact Mountain Warehouse.

Pricing

Mountain Warehouse requires the prices to be submitted in GBP. If you do not have pricing attributes in GBP, you need to set a currency conversion.

Listed products

If you have problems with products not appearing on Mirakl-based marketplaces – especially if you are trying to create products, check the Listed products page for more information. Use the Channel status filter or the Validation and feedback tab to view all known errors for specific products.

If you see either of the below statuses, refer to the article ChannelEngine: why is my product listed as 'Product not found' in the inventory report?:

• Product not found in inventory report
• Product not in offer file

Products that ChannelEngine has failed to export are shown as Invalid, e.g.: products with an empty GTIN or that do not yet exist on the marketplace.

Alternatively, download the error report generated by Mirakl. To do so:

1. Log onto the Mirakl platform and go to Catalog, Product imports.
2. Identify the latest report and click the See details button.
3. Download the CSV file Non-integrated products report.

FAQs

How often does each task run on Mirakl-based marketplaces?

By default, Mirakl-based marketplaces follow the schedule below:

Task	Frequency
Export product data to marketplace	every 60 minutes
Export product offers to marketplace	every 15 minutes
Import product offers from marketplace	every 15 minutes
Import orders from marketplace	every 15 minutes
Export order shipments to marketplace	every 15 minutes
Export returns to marketplace	every 30 minutes

Can I map attributes on ChannelEngine and on the Mirakl platform?
No. Mapping attributes on the Mirakl marketplace platform interferes with ChannelEngine's content export. Therefore, it is recommended to categorize and map content only on ChannelEngine.

Why am I not receiving feedback on my content and/or offer exports?
Chances are that you are receiving the feedback. However, different types of error reports can take a couple of hours or several days to be generated:

• Offer feedback
  • Error reports are mostly generated automatically and are imported quickly.
• Content feedback
  • Transformation error report - this is automatically generated, and usually imported within a maximum of one day.
  • Conventional error report - this requires a manual review by the Mirakl-based marketplace, and not all do so. It can take several days for this report to be imported.

Note that the previous feedback report is not removed from ChannelEngine until both the latest transformation and the conventional reports have been fully processed by ChannelEngine. If there are no errors to report, no new reports are generated.