rustdoc_json is used at run time in 4 crates (of which 1 optionally). It's used only as a dev dependency in 9 crates (of which 5 directly).

Depender (with downloads and own rev deps) rustdoc_json version
1.1K cargo-public-api ^0.8.9
440 term-rustdoc ^0.8
crate-inspector ^0.8
7 supercilex-tests optional ^0.8.8
142K 194 syntect dev ^0.8.8
4.7K 5 rustup-toolchain dev ^0.8.7
4.7K 8 public-api dev ^0.8.8
360 2 rustic_core dev ^0.8.9
120 1 organize-rs_core dev ^0.8.5