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- Biconomy proposes ERC-8211 as a new Ethereum Standard. “smart batching” Definite DeFi flows.
- Standard allows AI agents to chain multiple-step transactions into a single call and resolve each step during execution.
- Ethereum Foundation researcher Barnabé Monnot says ERC-8211 aligns with the Foundation’s “Improve UX” DeFi is a complex technology that can be difficult to understand for users.
Biconomy proposes a new Ethereum Standard, ERC-8211 that introduces a number of important features. “smart batching” AI agents, smart accounts and other systems can now execute multi-step DeFi in a single transaction. Parameters for each step are resolved at the time of execution instead of signing.
Standard published April 6, 2026 is designed for encoding contracts that work with existing account-abstraction systems and do not require a protocol fork.
Stacking ERC-8211 according to its full specifications published On Github the protocol addresses an important bottleneck within today’s DeFi Infrastructure. The fact that most batch systems lock parameters before the transaction is sent to the chain. It is frustrating when subsequent steps are dependent on unknown outputs, like the exact amount of proceeds from a token exchange or a loan withdrawal.
“Smart batching resolves parameters at execution time,” the ERC-8211 specification explains, allowing each parameter in a batch to declare how its value should be obtained — as a literal, via a static call, or from an on-chain balance — and what constraints it must satisfy before the batch can continue.
ERC-8211 specifies a batch-format in which each parameter has three bits of information. A fetcher type that defines how it’s obtained, routing data that determines whether the input is called a target or value, or calldata and finally, predicates within the parameters that have to hold otherwise the whole batch goes back.
The AI agent can express flows like “Swap token B for token A on UniswapThe second call will take the amount from the output that was generated by the initial call, rather than guessing a number.
The Smart Batching system also includes assertion-only “predicate entries,” where a batch step has no call target and instead encodes a boolean condition on chain state — for example, asserting that a wallet’s WETH balance remains above a safety threshold after a leverage loop.
The predicates act as gate between the steps and use the same resolution path at runtime as the regular actions. “a program with embedded safety checks, not a hopeful script.”
In comments to Decrypt, Ethereum Foundation research scientist Barnabé Monnot said ERC-8211 fits directly into the organization’s user-experience roadmap.
The protocol cluster Ethereum Foundation has ‘Improve UX’ as one of its strategic priorities,” Monnot said, adding that “ERC-8211 support is coming from this strategic priority” It was at a 2025 Workshop convened under the Improve UX Initiative of the Foundation that Biconomy’s partnership with the Foundation began.
Monnot asserted that “the agentic execution angle is new, but has imposed itself given the rapid developments of agents over the last three months,” Calling ERC-8211 “a perfect use case since agents can orchestrate complex cross-chain interactions, and ERC-8211 gives them the right platform to do so.”
Biconomy describes itself as the “smart wallet and high-performance execution engine”. DeFi Previously, he worked on gasless UX as well as account-abstraction software. He says that ERC-8211 is easily implemented in TypeScript clients by constructing batches directly against the encoding.
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Source: crypto.news
