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Small, fast, modular HTTP server written in Erlang.
Erlang HTML Makefile Shell


Cowboy is a small, fast and modular HTTP server written in Erlang.


Cowboy aims to provide a complete HTTP stack in a small code base. It is optimized for low latency and low memory usage, in parts because it uses binary strings.

Cowboy provides routing capabilities, selectively dispatching requests to handlers written in Erlang.

Because it uses Ranch for managing connections, Cowboy can easily be embedded in any other application.

No parameterized module. No process dictionary. Clean Erlang code.

Getting Started

  • Read the guide
  • Look at the examples in the examples/ directory
  • Build API documentation with make docs; open doc/index.html


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