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POST
eth_syncing
curl --request POST \
  --url https://tempo-mainnet.core.chainstack.com/c3ce2925b51f1ed18719fe8a23bbdccf/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_syncing",
  "params": [],
  "id": 1
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": true
}

Documentation Index

Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt

Use this file to discover all available pages before exploring further.

Tempo API method that returns the sync status of the node. Returns false if the node is fully synced, or a sync status object if syncing.
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​
Parameters

  • none

​
Response

  • result — false if not syncing, or a sync status object:
    • startingBlock — block at which sync started
    • currentBlock — current block being synced
    • highestBlock — estimated highest block

​
eth_syncing code examples

const Web3 = require("web3");
const NODE_URL = "CHAINSTACK_NODE_URL";
const web3 = new Web3(NODE_URL);

async function checkSyncStatus() {
  const syncing = await web3.eth.isSyncing();
  if (syncing === false) {
    console.log("Node is fully synced");
  } else {
    console.log(`Syncing: ${syncing.currentBlock}/${syncing.highestBlock}`);
  }
}

checkSyncStatus()

Body

application/json
​
jsonrpc
string
default:2.0
​
method
string
default:eth_syncing
​
params
any[]
​
id
integer
default:1

Response

200 - application/json

Sync status

​
jsonrpc
string
​
id
integer
​
result

false if the node is not syncing

Last modified on May 18, 2026