In the last three weeks the agent-payments stack added a fifth shipped standard. Pay.sh launched on Solana with Google Cloud. Coinbase's x402 crossed 167M cumulative transactions. OKX Agent Payments Protocol added wallet+SDK+broker. ERC-8183 graduated to BNB Chain mainnet. Coinbase's Agent.market opened a seven-category app store.

All five share one property: they settle at T+0.

That's exactly what they should do. If your agent is calling Vertex AI or paying for a Perplexity query, you want sub-second finality. Pay.sh, x402, and OKX APP are very good at being a payments rail. You shouldn't ask a payments rail to do anything else.

But agent treasuries don't only pay for tools. Increasingly, they trade.…