# Faraday: a middleware layer for Ruby HTTP clients

> Faraday is an HTTP client abstraction over Net::HTTP and other adapters, borrowing Rack's middleware model for the request and response cycle. It suits library authors and API client builders, not one-off scripts.

**lostisland/faraday** — Simple, but flexible HTTP client library, with support for multiple backends.

- Repository: https://github.com/lostisland/faraday
- Website: https://lostisland.github.io/faraday
- Stars: 5,950 · Forks: 1,027
- Language: Ruby
- License: MIT
- Published: 2026-09-22 · Updated: 2026-09-22 · Language: en
- Canonical page: https://hysenlabs.com/projects/lostisland-faraday

## The problem Faraday solves for Ruby API clients

Ruby ships Net::HTTP in the standard library, and it works. The trouble starts when you write a client library on top of it. Every caller who wants persistent connections, a different TLS stack, or parallel requests has to either accept your choice or fork you. Faraday splits that decision out. The README describes it as "an HTTP client library abstraction layer that provides a common interface over many adapters (such as Net::HTTP)", which is the whole design in one sentence: your code talks to Faraday, and Faraday talks to whichever adapter is configured. The audience is therefore narrow and specific. It is for people building a client that other people will install, and for teams that want to swap connection handling without rewriting request code. If you are writing a script that fetches one URL, Faraday is a layer of indirection with no payoff.

## Rack middleware applied to the request and response cycle

The mechanism is the interesting part. Faraday borrows Rack's middleware concept: a request passes through a stack of small objects on the way out, and the response passes back through the same stack in reverse. Each middleware can inspect or modify the request, call the next element, then inspect or modify the response. That is how features the README lists, such as automatic response parsing for JSON, XML and YAML, are implemented, rather than being baked into the core. The adapter sits at the bottom of the stack and performs the actual network call. Because the stack is ordered and explicit, you can insert your own middleware, for example to add an auth header or to retry a request, without touching the adapter or the calling code. The README also lists persistent connections (keep-alive), parallel requests, streaming responses and file uploads as built-in capabilities. Note that some of these depend on the adapter you choose, not on Faraday alone; the adapter list lives in the Awesome Faraday repository, and the README points there rather than enumerating what each adapter supports.

## Installing the faraday gem and making a first request

Installation is a normal Ruby gem install. The README does not walk through it; it directs readers to the Faraday website for the introduction and explanation, and to the API documentation for internals.

```bash
gem install faraday
```

In a Bundler project, add it to the Gemfile instead and let Bundler resolve it.

```ruby
gem "faraday"
```

The README states that the library supports Ruby 3.0 and newer, and that this is the set of versions it is tested against. After installation, the usual starting point is a connection object. The repository's examples directory contains client_spec.rb and client_test.rb, which are the files to read for a concrete first setup; the README itself does not print a request example. Treat the website's introduction as the tutorial path, and the API documentation as the reference for what a connection exposes. What you should see after a successful call is a response object whose body and status you can read directly, with parsing handled by the middleware you configured rather than by your own code.

## Where Faraday is the wrong choice

The middleware model has a cost, and it is paid in stack traces. When a request fails, the error surfaces from whichever layer raised it, and the adapter is several frames below your call site. Debugging a connection reset means knowing which middleware and which adapter are in play, which is more context than a direct Net::HTTP call requires. The second limitation is version support. The README is explicit that the library is tested against currently supported Ruby implementations, that support can be added or dropped without a major release, and that support is only provided for the versions listed. It also states that if a critical issue exists for a particular implementation at the time of a major release, support for that Ruby version may be dropped. Running Faraday on an EOL Ruby is therefore an unsupported configuration, even if it appears to work. Third, the abstraction only pays off if someone else benefits from the adapter swap. A single-application codebase that will never change backends is carrying a dependency for a flexibility it does not use.

## Faraday compared with calling Net::HTTP directly

The honest alternative is the standard library. Net::HTTP is already present, has no gem to install, and is the adapter Faraday uses by default. The difference is not raw capability but where configuration lives. With Net::HTTP you write connection setup, header handling, and response parsing inline, and each new concern is another branch in your method. With Faraday, those concerns become ordered middleware entries, and the adapter becomes a one-line choice. That matters when the same client code must run against different backends, which is the case the README is written for. It matters much less when there is one backend and one call site. A second alternative worth naming is the adapter ecosystem itself: the README lists Typhoeus, Patron, Excon and HTTPClient alongside Net::HTTP, and points to Awesome Faraday for the full list. Choosing Faraday means choosing that ecosystem, including the responsibility of checking that your adapter keeps pace with the Faraday version you run.

## Maintenance, upgrade cost and the MIT licence

The repository is not archived, and the last push was on 2026-09-16. Releases are frequent enough to matter for upgrade planning: v2.14.4 was published on 2026-09-15, v2.14.3 on 2026-06-16, and a 1.x line is still receiving releases, with v1.10.6 on 2026-06-24. That last point is the practical detail. Two maintained lines mean two upgrade paths, and the repository carries an UPGRADING.md file, which is where the 1.x to 2.x differences are documented. Read it before moving a production client across the major boundary. Faraday is MIT licensed, which is permissive and places few conditions on redistribution, but the licence text in LICENSE.md is the authority and this is not legal advice. One more maintenance consideration: the repository contains a package.json for the documentation site, with a docsify-cli dependency and a docs script that serves the docs directory. That is tooling for the website, not for the library, and it does not affect what you install as a Ruby developer.

## Conclusion

Adopt Faraday if you are writing a reusable API client or a gem that must not force a particular HTTP backend on its users, and if you are on Ruby 3.0 or newer. Do not adopt it for a single script that makes one request; Net::HTTP is already in the standard library and Faraday adds a configuration layer you will not use. Before committing, read UPGRADING.md for the 1.x to 2.x changes, confirm your chosen adapter is compatible with the Faraday version you install, and check the faraday.gemspec for the Ruby requirement your environment actually runs.

## FAQ

### How do I install Faraday in a Ruby project?

Install it as a gem with gem install faraday, or add gem "faraday" to your Gemfile and let Bundler resolve it. The README points to the Faraday website for the introduction and to the API documentation for internals.

### Which Ruby versions does Faraday support?

The README states that the library aims to support and is tested against currently supported Ruby implementations, and that currently means Ruby 3.0 and newer. Support can be added or dropped without a major release, and only the listed versions are supported.

### What does Faraday mean in this project?

In this project Faraday is the name of an HTTP client library abstraction layer for Ruby that provides a common interface over multiple adapters and applies Rack middleware concepts to the request and response cycle.

### Does Faraday work with adapters other than Net::HTTP?

Yes. The README lists Net::HTTP, Typhoeus, Patron, Excon and HTTPClient among the supported adapters and points to Awesome Faraday for the full list of adapters and middleware.

### What licence does Faraday use?

The repository is MIT licensed, with the licence text in LICENSE.md. The README carries a copyright line for 2009 to 2026 attributed to the Faraday Team.

## Sources

- [License: MIT](https://github.com/lostisland/faraday/blob/main/LICENSE)
- [lostisland/faraday on GitHub](https://github.com/lostisland/faraday)
- [Project website](https://lostisland.github.io/faraday)
- [README](https://github.com/lostisland/faraday/blob/main/README.md)
- [Releases](https://github.com/lostisland/faraday/releases)

---

Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/lostisland-faraday