Forward OTC settlement for agent treasuries: T+24h trades that don't depend on trust

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-