solana-jsonrpc-server-utils is used at run time in 3 crates. It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) solana-jsonrpc-server-utils version
2 solana-jsonrpc-tcp-server ^0.4.0
solana-jsonrpc-http-server ^0.4.0
solana-jsonrpc-ws-server ^0.4.0