Manage Venice x402 wallet credits. Covers POST /x402/top-up (payment discovery + signed USDC settlement), GET /x402/balance/{walletAddress}, GET /x402/transactions/{walletAddress}, USDC on Base (chain 8453) and Solana mainnet, the PAYMENT-SIGNATURE / SIGN-IN-WITH-X header names, minimum $5 top-up, t
Manage Venice x402 wallet credits. Covers POST /x402/top-up (payment discovery + signed USDC settlement), GET /x402/balance/{walletAddress}, GET /x402/transactions/{walletAddress}, USDC on Base (chain 8453) and Solana mainnet, the PAYMENT-SIGNATURE / SIGN-IN-WITH-X header names, minimum $5 top-up, transaction types TOP_UP/CHARGE/REFUND, and the x402 v2 PAYMENT-REQUIRED response shape returned by a