eth_getBlockByHash on Ethereum
Fetches a full block by its hash. Identical payload to eth_getBlockByNumber but keyed on the 32-byte block hash.
Use it when you already hold a hash (from a log or a parent-hash walk) and need reorg-safe lookup: unlike a block number, a hash pins one specific block even across a reorg.
Ethereum endpoint (public — no key)
https://rpc.nodeflare.app/eth/publicMethod
eth_getBlockByHash
Cost
2 CU
Chain ID
1
Block time
~12 s
Finality
~13 min (finalized)
Blocks on Ethereum
Ethereum produces a block every ~12 seconds, and the safe/finalized tags are meaningful here: finalized lags the head by two epochs (~13 minutes). Use finalized for exchange-grade confirmation logic and latest for UI reads.
Parameters
[blockHash, fullTransactions:boolean]cURL
curl https://rpc.nodeflare.app/eth/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_getBlockByHash","params":["0x0000000000000000000000000000000000000000000000000000000000000000", false],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/eth/public'
);
const result = await provider.send('eth_getBlockByHash', ["0x0000000000000000000000000000000000000000000000000000000000000000", false]);Try it live
Runs the example above against the public Ethereum endpoint — straight from your browser.
eth_getBlockByHash on Ethereum — FAQ
How do I call eth_getBlockByHash on Ethereum?
POST a JSON-RPC 2.0 request with "method": "eth_getBlockByHash" to NodeFlare's Ethereum endpoint at https://rpc.nodeflare.app/eth/public. No API key is required for the public endpoint.
What does eth_getBlockByHash cost on the free tier?
eth_getBlockByHash is weighted at 2 compute units per call. The free tier includes 2,000,000 CU/month, so that is roughly 1,000,000 eth_getBlockByHash calls per month — no credit card.
Is eth_getBlockByHash available on the public Ethereum endpoint?
Yes. eth_getBlockByHash works on the public Ethereum endpoint (https://rpc.nodeflare.app/eth/public) with no API key, rate-limited per IP. A free key adds higher limits and a dedicated path.
Anything Ethereum-specific to know when using eth_getBlockByHash?
Ethereum produces a block every ~12 seconds, and the safe/finalized tags are meaningful here: finalized lags the head by two epochs (~13 minutes). Use finalized for exchange-grade confirmation logic and latest for UI reads.
Call eth_getBlockByHash on Ethereum with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →