New service checks x402 payment endpoints before transactions

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A new verification service allows users to check x402 payment endpoints before spending money. The service, tested on October 14, 2026, confirms whether a target is active and reveals its payment requirements. Each check costs 0.01 USDC on the Base mainnet network. The service provides payment details in both v1 JSON format and v2 header format. This helps users avoid paying for non-responsive or misleading payment endpoints.

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