Free dry run
Fill in your store details, attach your products CSV, and submit. Most catalogues get an answer immediately: allowed, needs a quick human look, or refused with the reason, under our hosting policy. Nothing is signed, nothing is charged, and this page cannot be found by search engines.
How to get the file
In Shopify: Products, then Export, then All products, plain CSV, all columns. WooCommerce, BigCommerce, Magento and Square Online each have their own product-export screen; any of those files works here too. The export checklist covers the rest of your data — for the dry run, the products file is enough.