Cargo Features

[dependencies]
pallet-contracts-rpc-runtime-api = { version = "3.0.0", default-features = false, features = ["std"] }
default = std

The std feature is set by default whenever pallet-contracts-rpc-runtime-api is added without default-features = false somewhere in the dependency tree.

std default

Enables std of parity-scale-codec ^2.0.0, pallet-contracts-primitives ^3.0.0, sp-api ^3.0.0, sp-runtime ^3.0.0, and sp-std ^3.0.0

pallet-contracts-rpc-runtime-api has 2 features without comments.