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Farcaster is a decentralized social network protocol designed to enable developers to build permissionless, user-owned social applications. It provides a foundation for social identity and messaging that is not controlled by any single entity, aiming to solve the centralization and censorship issues common in traditional social networks. Farcaster's architecture allows users to own their social data and identity, enabling interoperability and composability across apps built on the protocol.

The protocol offers several developer tools including AuthKit, a React toolkit for integrating Sign In with Farcaster (SIWF), and Mini Apps, which are lightweight apps that run inside the Farcaster feed. Developers can build and distribute social apps without needing to manage backend infrastructure. Additionally, Farcaster provides Snapchain, a data indexing and querying system that allows developers to sync the network data locally and run advanced queries using PostgreSQL.

What sets Farcaster apart is its focus on decentralization combined with developer-friendly tooling. Unlike centralized social platforms, Farcaster enables users to control their social graph and data, while developers benefit from open protocols and APIs to build interoperable social experiences. The availability of tools like AuthKit and Snapchain lowers the barrier to entry for developers to integrate social identity and data into their apps. Farcaster is actively maintained with open-source code and documentation, making it accessible for teams looking to build decentralized social applications or integrate social login and data.

To get started, developers can explore the comprehensive documentation, build Mini Apps to run inside Farcaster feeds, add Sign In with Farcaster using AuthKit, or run Snapchain nodes to access real-time social data. The protocol supports permissionless innovation in social networking by providing a decentralized infrastructure layer for identity and social interactions.