HarnessRouter
One API for running coding-agent harnesses such as Codex, Claude Code and Hermes as product backends, with sessions, streaming, files and failure handling.
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Use cases
About HarnessRouter
HarnessRouter is listed in our agent infra category and is aimed at builders. One API for running coding-agent harnesses such as Codex, Claude Code and Hermes as product backends, with sessions, streaming, files and failure handling. Pricing, as the maker states it: Open source + cloud. Maturity: Active. We last checked the official link on 2026-10-19.
HarnessRouter at a glance
- Category: Agent infra
- Built for: Developers and teams building with AI agents
- Pricing: Open source + cloud (as the maker states it)
- GitHub: HarnessRouter/harnessrouter · 3,167 stars (as of Oct 21, 2026)
- Latest release: v0.35.13, Oct 21, 2026
- Last commit: Oct 21, 2026
- Official site: harnessrouter.ai
- Listed on AgentScout: Oct 19, 2026
HarnessRouter FAQ
What is HarnessRouter?
One API for running coding-agent harnesses such as Codex, Claude Code and Hermes as product backends, with sessions, streaming, files and failure handling.
How much does HarnessRouter cost?
HarnessRouter's pricing, as the maker states it: Open source + cloud. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Where can I find HarnessRouter's source code?
On GitHub at HarnessRouter/harnessrouter, which had 3,167 stars as of Oct 21, 2026. The latest release is v0.35.13 (Oct 21, 2026).
What are alternatives to HarnessRouter?
Similar tools include OmniRoute, skills.sh, opencodex, Agent Tincan, HiRoute and Omnara.
Facts from our link-checked listing, the GitHub repository and the official site. See something wrong? Suggest an edit.
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HarnessRouter alternatives
Other agent infra tools in our directory. See all agent infra tools →
OmniRoute
Self-hosted AI gateway that puts hundreds of model providers behind one endpoint for Claude Code, Codex, Cursor and others, with quota-aware fallback and MCP/A2A support.
skills.sh
Vercel Labs' open-source CLI (npx skills) and directory for finding, installing and sharing agent skills across Claude Code, Codex, Cursor, OpenCode and 75+ other coding agents.
opencodex
A local provider proxy that lets OpenAI Codex (CLI, app and SDK) and Claude Code run on other model providers such as Claude, Gemini, Grok, DeepSeek or local Ollama models.
Agent Tincan
Agent Tincan lets your AI agents (Claude Code, Codex, Gemini, Hermes, ChatGPT and others) ask each other to do things and hand back results through a small relay on your own Tailscale network, with no open ports or API keys between agents.
HiRoute
HiRoute, from the Higress team, is an open-source local model router for long-running agents like Codex and Claude Code: it hands routine stages to cheaper models, saves your strongest model for hard steps and keeps a record of each decision.
Omnara
Open-source managed agent platform, a self-hostable alternative to Claude Managed Agents and the OpenAI Agents API, with tools, secrets and sandboxes.
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