Top holders for any Base ERC-20 via the Blockscout Base explorer, with computed concentration (top1/5/10/20% + contract-held%) and an optional whale-risk read. A token whose explorer holder list does not reconcile with its stated supply, is not a complete ranked top-N, or whose response identity does not match the request, is refused uncharged. Read on demand: the first call reads the explorer; later calls reuse that read until it ages out.

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