🧵ERC-8004 and Filecoin Pin In short: ERC-8004 defines how autonomous agents register their identity, reputation, and verification information on-chain. Filecoin Pin stores the agent's metadata and verification files, ensuring the records are verifiable, persistent, and publicly discoverable. 1/ Identity ERC-8004 defines how trustless agents register their identity, reputation, and verification information on Ethereum. This standard keeps the scope narrow. Agents can exist and interact on-chain without a private registry or administrative directory. 2/ Metadata ERC-8004 stores references, not complete data, on-chain. Agent metadata is stored off-chain and describes usage, endpoints, and verification methods. This design gives control to the builders, avoiding pre-defined rules for scoring or behavior. 3/ Storage Developers use Filecoin Pin to store the agent's metadata and verification files on Filecoin. This increases verifiable persistence. Even if the original infrastructure disappears, agent records remain accessible and inspectable. 4/ Tools Agent0 is an open-source SDK developed by Marco De Rossi (@marco_derossi) that simplifies the agent registration process. Developers can issue agent cards, set PIN code data on Filecoin, and register identities on-chain using a standard workflow. 5/ Discovery ERC-8004 and Filecoin Pin support open agent discovery. Identity, reputation signals, and verification records remain public and verifiable. Agents gain trust by sharing standards rather than closed directories or platform controls. Learn how to use the Filecoin Pin CLI with ERC-8004 autonomous agents: