Ponder is an open-source Ethereum indexing framework that enables developers to transform on-chain data into custom application schemas using TypeScript. It fetches blockchain data, executes user-defined indexing logic, and stores the results in Postgres. Once indexed, data can be queried via GraphQL, SQL over HTTP, or directly through Postgres. Designed for EVM-compatible chains, Ponder provides a fast, type-safe, and flexible alternative to third-party indexing services, giving developers full control over their backend infrastructure for building high-performance Web3 applications.