Returns one platform's fee table, the one this server's numbers use: every fee and rule with its value, a plain label, its source link and the day it was checked, whether it's official or a third-party estimate, and both values where sources disagree, plus when the table is due for its next check. Etsy: listing, transaction, processing, Offsite Ads, Etsy Ads minimums, shipping lines, Etsy Plus, tax facts. Shopify: plan prices on both billings, card rates, the third-party processor fee, currency, chargebacks, Shopify Tax. Amazon: plans, referral by category and the media closing fee (official), and FBA, storage, returns, peak and coupon fees (third-party estimates: Amazon's own tables sit behind the Seller Central login). Call it to cite a platform's fees, to answer what a fee is, or to check how current the numbers are. Takes no figures; platform defaults to etsy. Free, no sign-in. Nothing is stored.