user49723: Does anyone know some reliable Bitcoind fork which allows to use address index?
I know that there are 
 https://github.com/bitpay/bitcoin and
 https://github.com/btcdrak/bitcoin/releases
But is seems that there are not supported any more.
What I really need, it is getting unspend outputs for any address (not for the wallet only), and it need to work fast(max 1-5s).

user52021: The scantxoutset RPC in 0.17+ will do what you want, although unless you batch query several addresses at once it may be a bit slower than what you were asking for.

49723: <p>Does anyone know some reliable Bitcoind fork which allows to use address index?
I know that there are 
 <a href="https://github.com/bitpay/bitcoin" rel="nofollow noreferrer">https://github.com/bitpay/bitcoin</a> and
 <a href="https://github.com/btcdrak/bitcoin/releases" rel="nofollow noreferrer">https://github.com/btcdrak/bitcoin/releases</a></p>

<p>But is seems that there are not supported any more.</p>

<p>What I really need, it is getting unspend outputs for any address (not for the wallet only), and it need to work fast(max 1-5s).</p>
 52021: <p>The scantxoutset RPC in 0.17+ will do what you want, although unless you batch query several addresses at once it may be a bit slower than what you were asking for.</p>
