JSON-RPC HTTP

Solana HTTP RPC is JSON-RPC 2.0 over HTTP POST with Content-Type: application/json, documented in Solana HTTP RPC docs. Use it for request-response state reads, simulation, and transaction submission.

curl -sS http://127.0.0.1:8899 -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"getSlot"}'

Method	Use
getHealth	Health probe.
getSlot	Current slot.
getBalance	Lamports for an account.
getAccountInfo	Owner, lamports, executable flag, and data.
getProgramAccounts	Program-owned account scan; expensive without filters.
simulateTransaction	Preflight a signed transaction.
sendTransaction	Submit a signed serialized transaction.

tip

Apply /developer/rate-limiting to scans, batch calls, and send retries.