Hosted wallet spend-limit policy for autonomous agents: per-call and per-counterparty caps, autopay spend controls, wallet risk score, transaction-pattern burst signals, counterparty exposure, and fresh D1 provenance before an agent pays. Price 0.25 USDC on Base via x402. Demo: https://wallet-portfolio-history-mcp.mtree.workers.dev/demo/tools/wallet_spend_limit_policy. Contact: https://wallet-portfolio-history-mcp.mtree.workers.dev/contact.

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