Composable service middleware for Haskell, inspired by Rust's Tower.

tower-hs provides a composable middleware abstraction for any service type. Build middleware stacks with retry, timeout, circuit breaker, and more — all with pure error handling via Either (no exceptions).

tower-hs

Composable service middleware for Haskell, inspired by Rust's Tower.

Generic Service/Middleware abstractions with protocol-agnostic middleware: retry, timeout, circuit breaker, filter, hedge, tracing (OpenTelemetry), logging, validation, request transformation, and test doubles.

Part of the tower-hs mono-repo. See the repo README for full documentation and examples.

Related packages

• http-tower-hs — HTTP client middleware built on tower-hs
• servant-tower-hs — Servant client middleware built on tower-hs.