Hosted portfolio change digest for agents: compare current wallet state against prior D1 snapshots, flag token balance deltas, new transactions, DeFi position changes, and transaction-velocity alerts before autopay or routing funds. Price 0.20 USDC on Base via x402. Demo: https://wallet-portfolio-history-mcp.mtree.workers.dev/demo/tools/portfolio_change_digest. Contact: https://wallet-portfolio-history-mcp.mtree.workers.dev/contact.

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