curl --request POST \
  --url https://api.kas.fyi/v1/rpc/getMempoolEntry \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "transactionId": "fc4c90a646687ba6f862e6089285dd7a610ef4d7f7614d25295f65aceb02bc41",
  "includeOrphanPool": false,
  "filterTransactionPool": false
}
'

{
  "mempoolEntry": {
    "fee": "1000",
    "transaction": {
      "version": 1,
      "inputs": [
        {
          "previousOutpoint": {
            "transactionId": "34e9538fd3225652553930657c3d767d5ccab0fcd545038a69c202e45929dcd6",
            "index": 0
          },
          "sequence": "4294967295",
          "sigOpCount": 1,
          "signatureScript": "0x473044..."
        }
      ],
      "outputs": [
        {
          "value": "1000000000",
          "scriptPublicKey": "<string>",
          "verboseData": {
            "scriptPublicKeyType": "pubkeyhash",
            "scriptPublicKeyAddress": "kaspa:qpzpfwcsqsxhxwup26r55fd0ghqlhyugz8cp6y3wxuddc02vcxtjg75pspnwz"
          }
        }
      ],
      "lockTime": "0",
      "subnetworkId": "0100000000000000000000000000000000000000",
      "gas": "0",
      "payload": "0x",
      "mass": "1000",
      "verboseData": {
        "transactionId": "34e9538fd3225652553930657c3d767d5ccab0fcd545038a69c202e45929dcd6",
        "hash": "34e9538fd3225652553930657c3d767d5ccab0fcd545038a69c202e45929dcd6",
        "computeMass": "1000",
        "blockHash": "34e9538fd3225652553930657c3d767d5ccab0fcd545038a69c202e45929dcd6",
        "blockTime": "1638360000000"
      }
    },
    "isOrphan": false
  }
}