OpenSea Launches Ethereum Open Standard ERC-8257 for AI Agent Tool Registration

Odaily reports that OpenSea has announced the launch of the Ethereum open standard ERC-8257 (Agent Tool Registry), positioning it as the "app store for AI agent tools."

According to the announcement, developers can use this standard to register tools on-chain, declare access rules and pricing, while also enabling AI agents to autonomously discover, purchase access rights, and invoke relevant tools without human intervention.

OpenSea stated that ERC-8257 can be composable with other protocols such as ERC-8004 (Agent Identity), MCP (Tool Discovery), and x402 (Payment Protocol), collectively forming the infrastructure for AI agent on-chain operations. ERC-8257 is currently in the draft stage, and OpenSea has invited developers to participate in further refining the specification.