Welcome to Arch!
================

.. image:: /_static/img/arch-logo.png
   :width: 100%
   :align: center

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   <div style="text-align: center; font-size: 1.25rem;">
   <br>
   <p>Build <strong>faster</strong>, <strong>multi-LLM</strong> agents for the <strong>enterprise</strong>.</p>
   </div>

   <a href="https://www.producthunt.com/posts/arch-3?embed=true&utm_source=badge-top-post-badge&utm_medium=badge&utm_souce=badge-arch&#0045;3" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/top-post-badge.svg?post_id=565761&theme=dark&period=daily&t=1742433071161" alt="Arch - Build&#0032;fast&#0044;&#0032;hyper&#0045;personalized&#0032;agents&#0032;with&#0032;intelligent&#0032;infra | Product Hunt" style="width: 250px; height: 54px;" width="250" height="54" /></a>

`Arch <https://github.com/katanemo/arch>`_ is an AI-native proxy server and the universal data plane for AI - one that is natively designed to handle and process AI prompts, not just network traffic.

Built by contributors to the widely adopted `Envoy Proxy <https://www.envoyproxy.io/>`_, Arch helps you move faster by handling the pesky *low-level* work in AI agent development—fast input clarification, intelligent agent routing, seamless prompt-to-tool integration, and unified LLM access and observability—all without locking you into a framework.

.. tab-set::

  .. tab-item:: Get Started

    .. toctree::
      :caption: Get Started
      :titlesonly:
      :maxdepth: 2

      get_started/overview
      get_started/intro_to_arch
      get_started/quickstart

  .. tab-item:: Concepts

    .. toctree::
      :caption: Concepts
      :titlesonly:
      :maxdepth: 2

      concepts/tech_overview/tech_overview
      concepts/llm_provider
      concepts/prompt_target

  .. tab-item:: Guides

    .. toctree::
      :caption: Guides
      :titlesonly:
      :maxdepth: 2

      guides/prompt_guard
      guides/agent_routing
      guides/function_calling
      guides/llm_router
      guides/observability/observability

  .. tab-item:: Build with Arch

    .. toctree::
      :caption: Build with Arch
      :titlesonly:
      :maxdepth: 2

      build_with_arch/agent
      build_with_arch/rag
      build_with_arch/multi_turn

  .. tab-item:: Resources

    .. toctree::
      :caption: Resources
      :titlesonly:
      :maxdepth: 2

      resources/configuration_reference