Since June 11, Coinbase has allowed the AI agents ChatGPT, Grok, Claude, Perplexity and Muse to trade more than 900 cryptocurrency pairs, U.S. futures contracts, as well as U.S. stocks and ETFs. Grok accounted for about 60% of agent trading on Coinbase between September 14 and 21, compared with 13% for Claude and 1.5% for ChatGPT. Morgan Stanley has blocked third-party agents, while JPMorgan, Citi and Bank of America have restricted access after discovering unauthorized agents in customer accounts. Despite partial safeguards, Coinbase applies no daily or session spending limit on the server side, and x402 payments are irreversible, leaving accounts and funds exposed to potentially significant losses.
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