Bulk onchain address labeling: POST up to 50 Base/EVM addresses, returns curated entity labels (CEX hot wallet, DEX router, bridge, stablecoin, lending protocol, plus sanctioned/mixer/scam flags) with tag, name, category, confidence and source. For AI agent due diligence, counterparty screening, automated KYC-lite and payment-routing risk gating. null = address not in the curated label set.

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