bitcoind json-rpc can do it, I think I saw this on blockchain.info but I don't see it now.


getmempoolentry does it. However this is restricted to txes currently in mempool.

  • well, I was hoping there is online tool, where I can paste tx hash and see if my client who is sending coins to me actually can do bump fee, before asking him to do so Apr 30 '20 at 21:41

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