eth_newBlockFilter on XLayer
Creates a filter that reports new block hashes as they arrive, polled via eth_getFilterChanges. Stateful; needs a free API key.
A lightweight way to learn of new blocks by polling for hashes — but like all filters it's node-local and expires when idle. For head tracking, polling eth_blockNumber or a WebSocket newHeads subscription is usually simpler and more robust.
XLayer endpoint (keyed — free)
https://rpc.nodeflare.app/xlayer/v1/YOUR_KEYMethod
eth_newBlockFilter
Cost
10 CU
Chain ID
196
Block time
~1 s
Finality
soft ~1 s · hard on validity proof to L1
Logs & events on XLayer
Moderate activity concentrated around DEX and bridge contracts. Standard filtering practice applies; each eth_getLogs call costs 75 CU.
Parameters
None.cURL
curl https://rpc.nodeflare.app/xlayer/v1/YOUR_KEY \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_newBlockFilter","params":[],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/xlayer/v1/YOUR_KEY'
);
const result = await provider.send('eth_newBlockFilter', []);Try it live
Runs the example above against the public XLayer endpoint — straight from your browser.
eth_newBlockFilter on XLayer — FAQ
How do I call eth_newBlockFilter on XLayer?
POST a JSON-RPC 2.0 request with "method": "eth_newBlockFilter" to NodeFlare's XLayer endpoint at https://rpc.nodeflare.app/xlayer/v1/YOUR_KEY. This method requires a free API key — it is not available on the public endpoint.
What does eth_newBlockFilter cost on the free tier?
eth_newBlockFilter is weighted at 10 compute units per call. The free tier includes 2,000,000 CU/month, so that is roughly 200,000 eth_newBlockFilter calls per month — no credit card.
Is eth_newBlockFilter available on the public XLayer endpoint?
No. eth_newBlockFilter is a heavy method and requires a free API key. The public no-key endpoint serves standard read methods; create a free key to unlock eth_newBlockFilter, eth_getLogs, trace_* and debug_*.
Anything XLayer-specific to know when using eth_newBlockFilter?
Moderate activity concentrated around DEX and bridge contracts. Standard filtering practice applies; each eth_getLogs call costs 75 CU.
Call eth_newBlockFilter on XLayer with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →