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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About HarnessRouter
HarnessRouter is listed in our MCP & 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: MCP & infra
- Built for: Developers and teams building with AI agents
- Pricing: Open source + cloud (as the maker states it)
- GitHub: HarnessRouter/harnessrouter · 3,141 stars (as of Oct 19, 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 3,141 stars as of Oct 19, 2026.
What are alternatives to HarnessRouter?
Similar tools include CubeSandbox, microsandbox, Judge0, Omnara, Cloudflare Sandbox SDK and Agentcard.
Facts from our link-checked listing, the GitHub repository and the official site. See something wrong? Suggest an edit.
HarnessRouter ratings and reviews
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Related lists
🏆 Ranked in: MCP servers that work with Codex · MCP servers that work with Claude Code
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