Title.. Hoping to find out when a historical tx went into the mempool. I'm aware this is transient data and not in the blockchain. However i'm pretty sure I remember in the old days explorers used to log it.


i would like to find a block explorer that logs the first time its node saw particular transactions in the mempool, as opposed to the first time they were in a block. ie: I would like to look up a tx and see how long it sat in the mempool before it was mined.

  • The closest thing i know of is mempool.observer/monitor but i don't think they store the first seen version of an RBFed tx. May 18, 2021 at 18:00
  • From my recollection: For transaction in the mempool, a timestamp in a block explorer is set to when the transaction was first observed; once the transaction is mined, the timestamp is changed to the timestamp of the block. Sep 14, 2021 at 10:46

1 Answer 1


Could you be a bit more specific?

There are a few block explorers that do provide information specific to their block explorer's running node.

Best lead I have for you is: https://bitcoinvisuals.com/

There's a lot of node information on there though I'm not sure its exactly what you're looking for.

However, I know that the owner of the site is pretty responsive and very easy to get into contact with.

  • I edited my question.
    – Joe
    Dec 18, 2020 at 7:09

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