Brokers are shipping MCP servers so you can connect Claude, ChatGPT or Cursor straight to a brokerage account. I track every official one, from each broker's own docs, and asked one question: when the agent decides to trade, who actually places the order?

Of 14 servers:

The AI trades directly (6): Alpaca, Longbridge, NinjaTrader (beta), moomoo, Public and Tradier. Once connected with trading permission, the agent's order goes through. Some let you narrow the tools, but there's no confirmation step on the broker's side.

You confirm each order (3): tastytrade (a single-use confirmation token from a dry run, valid 60 seconds), TradeStation (explicit confirmation before every order) and eToro (every action is proposed for your review).

Approval is optional (4): Interactive Brokers (you approve each order unless you opt in to its autonomous mode), Robinhood (a trade-approvals toggle, off by default), Axi on MT5 (approval is your AI client's prompt, and "Always allow" skips it) and CCXT (preview and confirm by…