solana-keypair is used at run time in 161 crates (of which 32 optionally). It is a direct run-time dependency in 42 crates. It's used only as a dev dependency in 37 crates (of which 8 directly).

Depender (with downloads and own rev deps) solana-keypair version
111K 13 solana-connection-cache =2.2.1
111K 11 solana-quic-client =2.2.1
110K 3 solana-thin-client =2.2.1
110K 3 solana-udp-client =2.2.1
108K 258 solana-client =2.2.1
108K 30 solana-streamer =2.2.1
106K 40 solana-vote-program =2.2.1
257K 650 solana-sdk optional ^2.2.1
81K 47 solana-clap-utils =2.2.1
65K 38 solana-transaction ^2.2.1
63K 5 solana-client-traits ^2.2.1
63K 6 solana-quic-definitions ^2.2.1
62K 4 solana-genesis-config ^2.2.1
61K 12 solana-system-transaction ^2.2.1
109K 26 solana-perf optional =2.2.1
33K 11 solana-faucet =2.2.1
15K 10 solana-clap-v3-utils =2.2.1
13K 5 solana-tls-utils =2.2.1
2.0K 4 litesvm ^2.2
1.4K 2 solana-cli =2.2.1
1.3K 1 solana-tps-client =2.2.1
750 solana-keygen =2.2.1
650 agave-install =2.2.1
600 agave-cargo-registry =2.2.1
500 solana-tpu-client-next =2.2.1
260 solana-keyconv ^2.2.1
170 litesvm-loader ^2.2
litesvm-token ^2.2
184K 8 solana-zk-token-sdk dev =2.2.1
131K 15 solana-config-program dev =2.2.1
113K 51 solana-rpc-client dev =2.2.1
110K 3 solana-rpc-client-nonce-utils dev =2.2.1
81K 7 solana-vote dev =2.2.1
66K 6 solana-secp256k1-program dev ^2.2.1
65K 13 solana-zk-sdk dev =2.2.1
64K 6 solana-ed25519-program dev ^2.2.1
61K 3 solana-offchain-message dev ^2.2.1
62K 5 solana-presigner dev ^2.2.1
49K 1 solana-transaction-metrics-tracker dev =2.2.1
30K 5 solana-cost-model dev =2.2.1
20K 10 solana-svm dev =2.2.1
17K 3 agave-transaction-view dev =2.2.1
17K 27 solana-cli-output dev =2.2.1
18K 12 solana-runtime-transaction dev =2.2.1
10K 9 solana-storage-bigtable dev =2.2.1
9.6K 19 solana-entry dev =2.2.1
8.7K 8 solana-poh dev =2.2.1
7.3K 6 solana-compute-budget-instruction dev =2.2.1
6.7K 4 solana-unified-scheduler-pool dev =2.2.1
6.7K 1 solana-wen-restart dev =2.2.1