Lectura rápida
Empieza por la explicación más corta y útil antes de profundizar.
A defined interface through which software components communicate. REST APIs use HTTP methods (GET, POST) with JSON payloads. Solana uses JSON-RPC APIs where clients send method calls (getAccountInfo, sendTransaction) to validator nodes. GraphQL APIs (used by some indexers) allow clients to request exactly the data they need in a single query.