HarnessRouter Community Edition is an open-source, unified interface for agent harnesses designed for developers and AI infrastructure builders. Released under the Apache 2.0 license, it allows you to easily plug and play managed agent harnesses—such as Codex, Claude Code, and Hermes—into your products through a single API on your own infrastructure.

With HarnessRouter, you can seamlessly switch between different agent harnesses without having to rebuild your backend. The tool handles complex state operations out of the box, including sessions, streaming, files, artifacts, cancellation, and failure recovery. Furthermore, your model provider keys, state, and deliveries remain completely under your control, packed conveniently into a single Docker container containing the Gateway, Runner, and Console.

Pros of HarnessRouter Community Edition

Unified single API for multiple agent harnesses including Codex, Claude Code, and Hermes
Switch between harnesses without the need to rebuild your backend
Handles sessions, streaming, files, artifacts, cancellation, and failure recovery automatically
Full control over model provider keys, state, and deliveries on your own infrastructure
All-in-one deployment via a single Docker container containing the Gateway, Runner, and Console

Cons of HarnessRouter Community Edition

Requires self-hosting and infrastructure management via Docker
Limited to the specific agent harnesses supported (Codex, Claude Code, and Hermes)
Setup and configuration require developer expertise

Frequently Asked Questions

What is HarnessRouter Community Edition?

HarnessRouter Community Edition is an open-source (Apache 2.0) unified interface and API for agent harnesses like Codex, Claude Code, and Hermes, allowing you to run them on your own infrastructure.