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Amazon Product Advertising API vs Social Fetch — which should I use?
Use Amazon PA-API when you need official ASIN catalogs, advertising, or seller integrations they offer for your account. Use Social Fetch when you need a public creator Shop page as JSON without Amazon partner credentials — especially next to TikTok Shop and other storefronts on one key.
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This answer comes from Amazon data API, which covers the full detail, endpoints and pricing in credits.