Subsquid

Subsquid is a decentralized data layer for on-chain information, covering more than 225 blockchains with real-time streaming and historical queries. Data is cryptographically validated using mechanisms such as multiple RPC sources and Merkle trees, then stored across a distributed worker network that uses DuckDB for fast queries.

The project specifically targets AI agents through MCP servers, data-querying tools, and integration skills for large language models and agents such as Claude.

For Web3 and AI, Subsquid serves as a source of verified data for analytics, DeFi, and AI applications. Its AI relevance is primarily in open-source, Rust-based data infrastructure.