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POST
/
2fc1de7f08c0465f6a28e3c355e0cb14
eth_newBlockFilter
curl --request POST \
  --url https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14 \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_newBlockFilter",
  "id": 1
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}

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.

Base API method eth_newBlockFilter creates a new filter object that notifies subscribers when a new block is added to the blockchain. This method is particularly useful for applications that need to stay updated with the latest blocks for processing or monitoring purposes.
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​
Parameters

  • none — This method does not require any parameters.

​
Response

  • result — the ID of the created filter. This ID is used to identify the filter in subsequent calls to methods like eth_getFilterChanges or eth_getFilterLogs to retrieve updates about new blocks.

​
Use case

The eth_newBlockFilter method is essential for:
  • Applications that perform actions triggered by the addition of new blocks, such as updating a user interface with the latest transactions or block information.
  • Services that monitor the blockchain for security or analytical purposes, needing real-time data on block additions.
  • Wallets and exchanges that track new blocks to confirm transactions.

Body

application/json
​
jsonrpc
string
default:2.0
​
method
string
default:eth_newBlockFilter
​
id
integer
default:1

Response

200 - application/json

The ID of the created block filter

​
jsonrpc
string
​
id
integer
​
result
string
Last modified on May 18, 2026