Hosted wallet allowance policy for autonomous agents: token allowance risk, approval exposure, curated spender watchlist, revoke/cap guidance, and autopay spend-control policy from fresh D1 wallet snapshots plus live allowance reads. Price 0.25 USDC on Base via x402. Demo: https://wallet-portfolio-history-mcp.mtree.workers.dev/demo/tools/wallet_allowance_policy. Contact: https://wallet-portfolio-history-mcp.mtree.workers.dev/contact.

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