AI agents pair a large language model or other AI system with a crypto wallet, letting software act as an independent economic participant that can hold funds, sign transactions, and negotiate with other parties rather than merely advise a human who clicks the buttons.
Most agents share the same rough architecture: an AI model handles planning and reasoning, while a linked wallet gives it the ability to pay for data, call smart contracts, or settle trades on its own. Builders often start from open frameworks such as Eliza (popularized by the ai16z ecosystem) or launchpads like Virtuals Protocol on Base, which let a creator tokenize an agent's personality and revenue stream so token holders share in whatever the agent earns. Because agents increasingly need to trust and transact with strangers, Ethereum introduced the ERC-8004 standard in early 2026, giving agents a portable on-chain identity, a queryable reputation history, and a way to have their claims validated before a deal is settled; actual payment usually runs over separate stablecoin micropayment rails rather than the identity layer itself.
Practical uses include automated trading and portfolio rebalancing, yield-hunting across DeFi protocols, market-making, and social-media personas that post, answer questions, or hire other agents for sub-tasks.
The risks are real: a stolen private key or a flawed prompt can drain funds instantly and irreversibly, agents can be manipulated through prompt injection or fake reputation signals, and the sector is still dominated by a small number of platforms on chains like Ethereum, leaving it volatile and largely unregulated.