getmempoolentry "txid"

The getmempoolentry RPC returns details on the active state of the TX memory pool.

*bitcoin-cli help getmempoolentry

getmempoolinfo

Returns details on the active state of the TX memory pool.

Result:
{                               (json object)
  "loaded" : true|false,        (boolean) True if the mempool is fully loaded
  "size" : n,                   (numeric) Current tx count
  "bytes" : n,                  (numeric) Sum of all virtual transaction sizes as defined in BIP 141. Differs from actual serialized size because witness data is discounted
  "usage" : n,                  (numeric) Total memory usage for the mempool
  "total_fee" : n,              (numeric) Total fees for the mempool in BTC, ignoring modified fees through prioritisetransaction
  "maxmempool" : n,             (numeric) Maximum memory usage for the mempool
  "mempoolminfee" : n,          (numeric) Minimum fee rate in BTC/kvB for tx to be accepted. Is the maximum of minrelaytxfee and minimum mempool fee
  "minrelaytxfee" : n,          (numeric) Current minimum relay fee for transactions
  "incrementalrelayfee" : n,    (numeric) minimum fee rate increment for mempool limiting or replacement in BTC/kvB
  "unbroadcastcount" : n,       (numeric) Current number of transactions that haven't passed initial broadcast yet
  "fullrbf" : true|false        (boolean) True if the mempool accepts RBF without replaceability signaling inspection
}

Examples:
> bitcoin-cli getmempoolinfo 
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "getmempoolinfo", "params": []}' -H 'content-type: text/plain;' http://127.0.0.1:8332/