Walmart bans seller logos, Coupang wants yours: one prompt per site

Walmart's image guide says images must not contain watermarks, seller logos or promotional text, while Coupang's main-image page says to feature your logo clearly (both read 2026-10-02). One shared main image will break one of the two, so keep a prompt and a shot list per marketplace and generate them as separate jobs.

The two pages side by side

Quotes are from Walmart's image guidelines and Coupang's Product main image page (both read 2026-10-02). They agree on a white, product-first main image and disagree on logos.

Coupang's extra images

Coupang describes additional images as showing the product in use, close up and from different angles. The page read does not give a count or file size, so do not copy a number from a third-party blog.

One product, two prompts

Keep the product reference identical and change only the marketplace line. For Walmart: product alone on seamless white, no logo, no text. For Coupang: square, product filling about 95% of the frame, white background, your logo only if your artwork is supplied as a reference and checked afterwards.

A model can redraw a logo wrongly, so for Coupang it is safer to composite the real logo file yourself after generation. The Coupang post covers the 95% fill check.

Keeping the variants straight

The failure mode in a multi-marketplace pipeline is a file landing in the wrong channel. Name files with the marketplace as a prefix, store the job id next to each, and have the upload step refuse any file whose prefix does not match its destination. A Walmart image with a logo, or a Coupang image without one, then fails in your pipeline, not in the marketplace review.

Batch it

Submit one job per SKU per marketplace with its own Idempotency-Key, and put the marketplace name in the job metadata so results do not get mixed (Jobs and results). Request a 1:1 ratio on both (Image API). Sume does not publish to either marketplace; you upload through their own tools.