Semantic Layer

Semantic Layer is an execution-layer protocol for Ethereum dApps, focused on redefining how MEV (Miner Extractable Value) is captured and distributed. Its core innovation is Application-Controlled Execution (ACE), which shifts transaction ordering rights from validators to the dApps themselves. This allows dApps to set custom rules for transaction sequencing, ensuring fairer execution and enabling the value generated from MEV to be returned to users and developers rather than being siphoned off by external searchers or validators.

The protocol also introduces x402, a payment standard for AI agents, and 42, an open market platform built on Semantic Layer where AI agents can autonomously issue assets, trade, and interact. Together, these form a three-layer stack for AgentFi: x402 for payments, Semantic Layer for intent execution, and 42 for market-level activities.

The core problem Semantic Layer addresses is the unfair distribution of MEV, where over 70% of extracted value currently goes to validators, leaving users with nothing. By making MEV programmable and application-specific, it aims to create a more equitable value flow within the DeFi ecosystem.

Regarding recent developments (March to September 2026), no verified information is available from the provided sources. The search results only cover project background and airdrop guides from late 2025, with no confirmed updates within the specified timeframe.