Is there a tool, online or offline, that allows me to input a stealth address, and the tool lists all the transactions that the stealth address was used as a ring member in? I thought that any Monero blockchain explorer would be capable of doing this, but apparently not.... (full message at <libera.ems.host/_matrix/media/v3/do…1b1badf3d1ba6c0e830159cac08db62fc0c>)

"Stealth address ?"

Rings refer to outputs. Addresses do not appear (explicitely or implicitely) on the chain.

If you mean you want to find outputs which get used (you do not see which address an output got to), then monero-wallet-cli does this for your own outputs if track-uses is set.

mnrrn[m]: it's not a tool that should be in wallets, since it requires a very heavy blockchain scan to build the table; it might get built eventually for unspent proofs

mnrrn: pokkst's scanner probably still works. You should try it. The GitHub repo is "unmaintained" since pokkst wants people to use i2p.

neptune has a full database solution here, but it might not work anymore: github.com/neptuneresearch/ring-membership-sql

It is fine as an educational tool, but users should probably not modify their behavior based on the decoy scanner: libera.monerologs.net/monero-research-lab/20220817#c137448

<Rucknium[m]> "mnrrn: pokkst's scanner probably..." <- Last I checked, the i2p-hosted repo had not received any additional updates

There's also this: github.com/moneroexamples/generic-xmr-scanner