zcash_keys is used at run time in 6 crates (of which 3 optionally). It is a direct run-time dependency in 3 crates.

Depender (with downloads and own rev deps) zcash_keys version
2.7K 4 zcash_client_backend ^0.2
170 2 zebra-scan ^0.2.0
110 zcash_client_sqlite ^0.2