Two rails. x402 pay-per-call — including the flagship address-reputation verdict — settles in USDC on Base mainnet (eip155:8453), no testnet setup needed (quickstart). The on-chain subscribe flow and the EIP-712 attestation domain on this page run on Arbitrum Sepolia (chainId 421614) — audit-gated, mainnet anchor pending.
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Your active subscriptions, recent activity, spend, and content-drift signals will appear here.