solana-jsonrpc-core is used at run time in 6 crates.

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