JSON-RPC HTTP

Execution-layer JSON-RPC is the standard interface every execution client implements, with method definitions maintained by ethereum.org and execution-apis. Geth serves JSON-RPC over HTTP on default port 8545 when enabled, as documented in Geth RPC docs.

warning

Do not expose raw 8545 directly. Put it behind authentication, request size limits, method allowlists, and /developer/rate-limiting controls.

Core methods

RPC_URL=${RPC_URL:-http://127.0.0.1:8545}
curl -s "$RPC_URL" -H 'content-type: application/json'   -d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

Use eth_getBalance for account balances, eth_call for read-only contract execution, eth_getLogs for bounded event queries, and eth_sendRawTransaction for pre-signed transaction submission. Keep eth_getLogs block ranges bounded to protect the node.

Core methods​

Core methods