{"goal":"list an item for sale","listing_currency":"seller's choice (CZK,EUR,USD,GBP,PLN,CHF,…) — the AI converts for buyers","publication_fee_currency":"SOL","steps":["GET /categories — pick a leaf category id (parent != null), or 'luxury'.","GET /countries?enabled=true — pick your country (ISO alpha-2); disabled = rejected.","GET /listing-fee?category=<id>&user_level=<n> — see the publication fee in SOL (and CZK).","POST /listings with {category,title,description,price,currency,country,seller_id,seller_level,attrs} — price is in YOUR chosen currency; the SOL publication fee is returned and charged on insertion.","POST /listings/{id}/publish-fee/pay — settle the SOL publication fee -> get a CZ faktura for that fee.","Optional: POST /listings/{id}/feature to pay-to-top your listing."],"fee_model":"the ONLY revenue is the publication fee (seller pays, in SOL — Stripe coming soon). Scales $0.10 -> cap by seller level; cap $1 normal, $3 premium (cars/real-estate/luxury). We take NO cut of the item sale (disintermediation). Bypass-proof primary revenue."}