eth_blockNumber on Unichain
Returns the latest block height the node has synced. The cheapest and most common health/poll call — used to confirm an endpoint is live and at chain tip.
Because it only reads the head, it's the ideal liveness/lag probe: poll it and compare against a second source to catch a stalled or forked node. It takes no block tag and answers instantly even on pruned nodes.
Unichain endpoint (public — no key)
https://rpc.nodeflare.app/unichain/publicMethod
eth_blockNumber
Cost
1 CU
Chain ID
130
Block time
~1 s
Finality
~1 s soft · L1-final ~13 min
Blocks on Unichain
Unichain produces a block every second — 86,400 blocks a day, 12× Ethereum's cadence. Flashblocks give ~250 ms pre-confirmations on top, but block numbers advance per full 1 s block.
Parameters
None.cURL
curl https://rpc.nodeflare.app/unichain/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/unichain/public'
);
const result = await provider.send('eth_blockNumber', []);Try it live
Runs the example above against the public Unichain endpoint — straight from your browser.
eth_blockNumber on Unichain — FAQ
How do I call eth_blockNumber on Unichain?
POST a JSON-RPC 2.0 request with "method": "eth_blockNumber" to NodeFlare's Unichain endpoint at https://rpc.nodeflare.app/unichain/public. No API key is required for the public endpoint.
What does eth_blockNumber cost on the free tier?
eth_blockNumber is weighted at 1 compute unit per call. The free tier includes 2,000,000 CU/month, so that is roughly 2,000,000 eth_blockNumber calls per month — no credit card.
Is eth_blockNumber available on the public Unichain endpoint?
Yes. eth_blockNumber works on the public Unichain endpoint (https://rpc.nodeflare.app/unichain/public) with no API key, rate-limited per IP. A free key adds higher limits and a dedicated path.
Anything Unichain-specific to know when using eth_blockNumber?
Unichain produces a block every second — 86,400 blocks a day, 12× Ethereum's cadence. Flashblocks give ~250 ms pre-confirmations on top, but block numbers advance per full 1 s block.
Call eth_blockNumber on Unichain with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →