ERC-8211: A New On-Chain Dynamic Execution Standard Designed for AI Agents

BroadChain learned that at 21:30 on April 20, according to PANews, AI Agents currently face a core bottleneck when executing complex on-chain operations: the DeFi environment is dynamic and ever-changing, while existing batch processing solutions like ERC-4337 have static and fixed parameters, leading to execution failures due to deviations in real-time conditions such as slippage and Gas. In April 2026, Biconomy and the Ethereum Foundation proposed the ERC-8211 draft, aiming to upgrade batch processing from static transaction sequences to "dynamic evaluation programs." It achieves this through the combination of three primitives: Fetchers (fetching real-time values from the chain), Constraints (validating constraints before execution, such as slippage ≤ 0.5%), and Predicates (determining whether to continue execution, such as cross-chain assets arriving). This enables AI Agents to atomically execute multi-step operations like "swap ETH for USDC and deposit into Spark," with parameters dynamically resolved based on the actual output of the previous step. If any condition is not met, the entire operation rolls back. This standard is compatible with account abstraction frameworks like ERC-4337 and does not change the underlying layer but adds programmatic execution semantics. Its significance lies in redefining the role of wallets, shifting them from "transaction signers" to "program interpreters," clearly presenting users with intents, conditions, and outcomes. It provides protocol-level support for AI Agents to manage non-custodial complex strategies, marking the transition of on-chain interactions from "static packaged calls" to a new stage of "dynamic intent programs."