eMAG main product image standard and what to ask Sume for

What is eMAG's main product image standard?

eMAG's Marketplace Academy page says the main image must display the product entirely and be clear, with the product centred and occupying as much of the image surface as possible, approximately 85%. It recommends a white or gray background, and allows environmental backgrounds for certain categories if professionally taken.

The rest of that article sits behind an eMAG Marketplace account, so pixel dimensions, file formats and file size are not stated here. Read them in your seller account before you set sizes.

What do you ask Sume for?

The rule is about composition, not pixels, which suits a prompt. Use openai/gpt-image-2.5 with your packshot as a reference, background: opaque and a prompt that names the white or grey backdrop and the 85% fill. Choose the aspect ratio your eMAG category needs from the Image API list, which for this model is 1:1, 4:3, 3:4, 5:4, 9:8, 4:5, 16:9, 9:16 or auto.

Quality is auto|low|medium|high|xhigh|max; omitted defaults to high.

curl -X POST https://api.sume.com/v1/images \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-image-2.5",
  "prompt": "Same product, unchanged, entire product visible and centred, filling about 85 percent of the frame, plain light grey background, no text, no logo",
  "input_references": [{"type": "image_url", "image_url": {"url": "https://example.com/packshot.png"}}],
  "aspect_ratio": "1:1",
  "quality": "high",
  "background": "opaque"
}'

How do the rules map to request fields?

Fill and centring come from the prompt; ratio and tier come from fields. Sume lists what it accepts per model, and a field the model does not list returns 400 unsupported_parameter, so read GET /v1/images/models first.

What to check before you upload?

Estimate the fill by eye on the output; a model may leave more margin than you asked for. If the product changes shape or colour from your packshot, regenerate with a stricter 'unchanged' prompt. Then compare the file against the pixel and size limits in your eMAG account.