rfc7239 is used at run time in 124 crates (of which 12 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 6 crates.

Depender (with downloads and own rev deps) rfc7239 version
47K 48 poem ^0.1.0
14K 5 viz-core ^0.1
1 warp-real-ip ^0.1