Feels like a Wiremock for Rust.

The licence terms / variation on MIT is interesting - unless this file is part of some standard I'm unaware of I'd expect it still shows as plain MIT for most automated SBOM collection/licence checks which feels problematic.

(https://github.com/rustrum/apate/blob/main/LICENSE-TERMS)

We use httpmock [1] for lychee, and it works quite well. Haven't looked too closely at the differences yet.

[1] https://docs.rs/httpmock/latest/httpmock/