# Install cassowary with Homebrew, Nix

Modern cross-platform HTTP load-testing tool written in Go. Version 0.19.0 via Homebrew; verified 2026-07-27. Also installable with nix: nix profile install nixpkgs#cassowary.

## Install

```sh
sudo av install brew:cassowary
```

Additional install commands:

### macOS

- Homebrew (100%):

```sh
brew install cassowary
```

  Evidence: local Homebrew formula metadata

### Linux

- Nix (92%):

```sh
nix profile install nixpkgs#cassowary
```

  Evidence: nixpkgs package indexes: pkgs/by-name/ca/cassowary/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

## Package facts

- **Package key:** brew:cassowary
- **Package manager:** Homebrew
- **Version:** 0.19.0
- **Source summary:** Modern cross-platform HTTP load-testing tool written in Go
- **Homepage:** <https://github.com/rogerwelin/cassowary>
- **Repository:** <https://github.com/rogerwelin/cassowary>
- **Last updated:** 2026-07-27T19:20:56+02:00
- **Generated:** 2026-08-03T19:37:03+00:00

## Executables

- cassowary (alias)

## Install behavior

- Bottle: not available

## Freshness

- Page generated: 2026-08-03
- Package-manager version: 0.19.0
## Project history and usage

Cassowary is a Go HTTP/S load-testing CLI for developers, testers, and sysadmins. Its README positions it as a cross-platform tool inspired by k6, ab, and httpstat.

### Project history

The official README emphasizes a single binary, Go implementation, and importable module design. The project packages both a CLI and a library surface, with release binaries and a documented Go module path.

### Adoption history

Adoption is niche and developer-tool focused. The README documents installation through GitHub releases, Homebrew on macOS, Docker, Arch/Manjaro AUR, Nix/NixOS, and RPM-building support, and it advertises an Awesome Go mention.

Homebrew analytics show 119 installs in the last 365 days in the formula API.

### How it is used

Typical use is `cassowary run` with a URL, concurrency, and request count. The README documents standard load tests, file slurp mode, JSON/CSV metrics export, Prometheus Pushgateway export, CloudWatch metrics, histograms, boxplots, POST data, durations, custom headers, x509 authentication, and distributed load testing.

### Why package nerds care

Cassowary is package-nerd interesting as a compact Go alternative to older HTTP benchmark tools: it offers one static-ish cross-platform binary, modern metrics outputs, and package-manager distribution without a service runtime.

### Timeline

- v0.10.0 and earlier: File slurp mode used its own command, according to the README note.
- 2026: Homebrew formula packages v0.19.0 from the official GitHub release archive.

### Related projects

- The README names k6, ab, and httpstat as inspirations.
- Prometheus Pushgateway and AWS CloudWatch are documented metrics export targets.

### Sources

- <https://api.github.com/repos/rogerwelin/cassowary>
- <https://github.com/rogerwelin/cassowary>
- <https://github.com/rogerwelin/cassowary/blob/master/docs/LIBRARY.md>
- <https://github.com/rogerwelin/cassowary#readme>
- <https://formulae.brew.sh/api/formula/cassowary.json>


## Security Notes

broad file, network, media, or database tool signal.

- **Geiger risk:** blue / medium
- broad file, network, media, or database tool signal

## Other Package-Manager Records

- Nix - cassowary: normalized package name match | nixpkgs package indexes: pkgs/by-name/ca/cassowary/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1


## Combined YAML source

View the package source record on GitHub. [combined/cassowary.yml](https://github.com/mxcl/pkgdb/blob/main/combined/cassowary.yml)


## Sources

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph