Interchange opens its brokerage sandbox to coding agents with an MCP server and scoped Agent Keys
Announced Oct 22, agents can search Interchange's docs and call any API method in its sandbox to open, fund, and trade accounts, under a Docs Only, Read Only, or Read & Write key you approve in your browser. Each call swaps the agent's token for a 60-second one recorded on the action, and the command tool never retries on its own, so a timeout can't turn into a second trade.