With a framework like Axum, yes, but with Rocket, no - you can just declare synchronous functions and pass them as a route handler, e.g.: https://github.com/Qwu

With a framework like Axum, yes, but with Rocket, no - you can just declare synchronous functions and pass them as a route handler, e.g.: https://github.com/Qwuke/recurse-ring/blob/main/src/main.rs#L185-L191 https://github.com/Qwuke/recurse-ring/blob/main/src/main.rs#... If you're averse to touching async fn's or tokio APIs _at all_, it's nice devex.