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POST
/
788f110831fe13808302bd79796d55e8
getmempoolancestors
curl --request POST \
  --url https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8 \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "1.0",
  "method": "getmempoolancestors",
  "params": [
    "f6a4beaf3b26ae273d50eb8f6ea18e776932b4fefd24c8b915b94b6d22e89bc9"
  ],
  "id": 1
}
'
{
  "result": "<array>",
  "error": {},
  "id": 123
}
The getmempoolancestors method retrieves all in-mempool ancestors for a specific transaction in the mempool.
Get an unconfirmed transaction hashFor the example to work, get an unconfirmed transaction hash from mempool.space.
Empty resultIf there is no pending transaction in the mempool that is an ancestor to the one you are querying, you will get an empty response.
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Parameters

  • txid (required) — the transaction ID for which to retrieve in-mempool ancestors.

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Response

  • result — an array containing all in-mempool ancestor transactions for the specified transaction.
  • error — an object containing an error message if an error occurred, otherwise null.
  • id — an integer representing the ID of the request, used to match requests with responses.

​
Use case

The getmempoolancestors method is useful for exploring the ancestry of a transaction in the mempool. It provides insights into the chain of transactions that are waiting to be included in a block.

Body

application/json
​
jsonrpc
string
default:1.0
​
method
string
default:getmempoolancestors
​
params
string[]

The transaction ID

​
id
integer
default:1

Response

200 - application/json

All in-mempool ancestors for the specified transaction

​
result
array

An array of in-mempool ancestor transactions

​
error
object
​
id
integer
Last modified on August 7, 2025