This catapult works on Bitcoin mainnet. Send sats, pay fee as little as 1 sat/vB, Here are the addresses:
bc1pjc7kvywr88f903tv3kdq9esklwl92tlt6xjm02k7f8fam2wdxans39hl0v
(see on mempool.space)bc1qlxanazsq65h5e9zzahgd6n8h0xxrnumm7rwmty
(see on mempool.space)38qmH2hnUBPsoE88XY7R5rfbW9D4aZip9V
(see on mempool.space)1BWAAJUFMaKzXPRQMeFk7ssHpKnVhE7ase
(see on mempool.space)Test with signet coins at Alt Signet Faucet where it works with similar boundaries as here (240≤sats_sent≤100*1000 so the minimum sent to the catapult is 240 sats and the maximum is 100'000 (one hundred thousand) sats, do not send more than that).
This catapult depends only on the internet connection for the Bitcoin Core node to notice the transaction and send the all-fee new transaction to the network. There may be short outages sometimes, caused by the ISP.