Skip to main content
POST
/
2fc1de7f08c0465f6a28e3c355e0cb14
eth_newPendingTransactionFilter
curl --request POST \
  --url https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14 \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "eth_newPendingTransactionFilter",
  "id": 1
}'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}
Base API method that creates a filter in the node to notify when new pending transactions are received. To check if the state has changed, call eth_getFilterChanges with the filter ID returned by this method.
Get you own node endpoint todayStart for free and get your app to production levels immediately. No credit card required.You can sign up with your GitHub, X, Google, or Microsoft account.

Parameters

  • none

Response

  • result — a string representing the filter ID. This ID should be used in subsequent calls to eth_getFilterChanges to retrieve new pending transactions.

Use case

The eth_newPendingTransactionFilter method is useful for applications that need to monitor the mempool for new transactions. Common use cases include:
  • Building transaction monitoring tools
  • Creating real-time transaction tracking interfaces
  • Implementing MEV (Maximal Extractable Value) strategies
  • Monitoring specific addresses for pending transactions
Note: After creating the filter, you need to poll eth_getFilterChanges periodically to get updates. Filters timeout if they’re not used for a period of time, so applications should be prepared to recreate them if necessary.

Body

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

Response

200 - application/json

The ID of the created pending transaction filter

jsonrpc
string
id
integer
result
string
I