Hosted token approval risk for autonomous agents: token-by-token spender approval exposure, allowance-to-balance ratios, risky/unlimited approval flags, revoke-or-cap actions, and agent 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/token_approval_risk. Contact: https://wallet-portfolio-history-mcp.mtree.workers.dev/contact.

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