amazon-product-research-mcp

2 of the 79 tools listed anonymously say in their own descriptions that they need an account or a key (my_products, my_store), but the endpoint issued no WWW-Authenticate challenge. The requirement is stated only in prose, so a call reaches the tool and comes back as a tool error instead of an authorization step.

A cross-origin preflight came back without Access-Control-Allow-Origin, so the endpoint is reachable from native clients only — code running in a web page is stopped by the browser before a request is ever sent.

The server exposes a public surface before authorization: evaluate_asin_sourcing, evaluate_brand, competitive_landscape, risk_assessment, xmkt_pricing_compare, gating_repricing_advice, find_brands_with_high_seller_churn, categories_amazon_retreating, top_velocity_brands, top_sourcing_picks, top_expanding_operators, brands_gaining_sellers, operator_brands_by_competition, find_undercompeted_brands, operator_compare, brand_buybox_trajectory, category_undercompeted_brands, unauthorized_sellers, operator_new_brands, operator_lost_brands, operator_category_dominance, find_single_seller_brands, operator_xmarket_presence, brand_xmarket, find_new_operators, find_deconcentrating_brands, brand_under_attack, operator_top_asins, operator_top_brands, brand_similar, brand_new_asins, category_top_growers, category_new_entrants, category_metrics, evaluate_category_for_private_label, find_underserved_niches, asin_comparables, asin_buybox_history, asin_profit_calc, watchlist_delta, watchlist_add_rule, watchlist_stats, watchlist_webwide, map_violations_today, filter_operators_by_fba_share, filter_brands_by_fba_share, brands_in_operator_network, search_products, shopping_search, collect_asin_now, watchlist_add, watchlist_remove, watchlist_list, watchlist_diff, set_cost_floor, operator_resells_what, operator_concentration, operator_new_on_brand, operator_classifier, playbook_create, playbook_list, playbook_run_now, playbook_schedule, find_product_across_web, webotee_job_status, authorized_seller_set, authorized_seller_list, buybox_loss_alert, web_search, alibaba_supplier_search, find_sourcing_opportunities, operator_buybox_losses, my_products, my_store, my_competitors, my_opportunities, product_page_content, keyword_demand, keyword_cross_marketplace.