Getmempoolancestors

getmempoolancestors

post

Returns all in-mempool ancestor transactions for a given transaction ID. An ancestor is a transaction whose outputs are used as inputs in another transaction. You can get a summary or detailed object output.

Authorizations

api-keyAuth

api-keystringRequired

Body

application/json

jsonrpcstringRequiredExample: 1.0

idstringRequiredExample: getmempoolancestors

methodstring · enumRequiredPossible values:

Responses

200

Ancestor transaction(s) retrieved successfully

application/json

resultone ofOptional

If verbose is true, returns a JSON object where keys are txids and values are details about each ancestor. Otherwise, returns a simple array of txids.

string[]Optional

List of ancestor txids (if verbose = false)

or

errorobject · nullableOptional

Null if successful; otherwise contains error details

idstringOptional

The ID of the request

401

Unauthorized

application/json

500

Internal Server Error

application/json

post

/

HTTPcURLJavaScriptPython

POST / HTTP/1.1
Host: btc.nownodes.io
api-key: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 95

{
  "jsonrpc": "1.0",
  "id": "curltest",
  "method": "getmempoolancestors",
  "params": [
    "txid_example",
    true
  ]
}

{
  "result": {
    "txid1": {
      "size": 250,
      "fee": 1000,
      "modifiedfee": 1000,
      "time": 1700000000,
      "height": 854998,
      "descendantcount": 1,
      "descendantsize": 600,
      "descendantfees": 3000,
      "ancestorcount": 1,
      "ancestorsize": 250,
      "ancestorfees": 1000,
      "depends": []
    },
    "txid2": "..."
  },
  "error": null,
  "id": "curltest"
}