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Documentation | | Repository

Why attohttpc?

This project's goal is to provide a lightweight and simple HTTP client for the Rust ecosystem. The intended use is for projects that have HTTP needs where performance is not critical or when HTTP is not the main purpose of the application. Note that the project still tries to perform well and avoid allocation where possible, but stays away from Rust's asynchronous stack to provide a crate that's as small as possible. Features are provided behind feature flags when possible to allow users to get just what they need. Here are the goals of the project:

  • Lightweight
  • Secure
  • Easy to use
  • Modular
  • HTTP/1.1
  • Use quality crates from the ecosystem (http, url, encoding_rs), not reinventing the wheel.


  • basic-auth support for basic auth
  • charsets support for decoding more text encodings than just UTF-8
  • compress support for decompressing response bodies (default)
  • json support for serialization and deserialization
  • form support for url encoded forms (does not include support for multipart)
  • multipart-form support for multipart forms (does not include support for url encoding)
  • tls support for tls connections (default)
  • tls-vendored activate the vendored feature of native-tls crate
  • rustls or tls-rustls support for TLS connections using rustls instead of native-tls


See the examples/ folder in the repository for more use cases.

let resp = attohttpc::post("").json(&request)?.send()?;
if resp.is_success() {
    let response = resp.json()?;
    // ...

Current feature set

  • Query parameters, Request headers, Bodies, etc.
  • TLS, adding trusted certificates, disabling verification, etc. for both native-tls and rustls
  • Automatic redirection
  • Streaming response body
  • Multiple text encodings
  • Automatic compression/decompression with gzip or deflate
  • Transfer-Encoding: chunked
  • serde/json support
  • HTTP Proxies & HTTP_PROXY, HTTPS_PROXY, NO_PROXY environment variables.
  • Happy Eyeballs
  • Authentication (partial support)


This project is licensed under the MPL-2.0.