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@HarnessRouter

HarnessRouter

The world's first unified interface for agent harnesses. Run Codex, Claude Code, and more through one API.
README.md
HarnessRouter

The world's first unified interface for agent harnesses. Backed by Y Combinator.

Run Codex, Claude Code, Hermes, and more in isolated sandboxes as your product backend. Your app sends a task through one API and gets back finished work: videos, games, codebases, docs, and more.

An LLM returns tokens. A harness gives it a sandbox, tools, and a loop, so it returns the actual file. GPT-5.2 and Claude Opus 4.8 are LLMs. Codex and Claude Code are harnesses.

Start here

  • starter-kit — build a Cursor-style coding app in 3 steps; open-source demos you can run today
  • skills — official skills for building agent-powered products
  • Documentation — quickstart, API, and harness guides
  • Start building free — 500 free launch credits, limited time

Links

Website · Pricing · Harness rankings · Blog · Discord · X · LinkedIn

Popular repositories Loading

  1. harnessrouter harnessrouter Public

    HarnessRouter Community Edition: the self-hosted, Apache-2.0 edition of the unified interface for agent harnesses. Run Codex, Claude Code, Hermes, PI, DSH, and more through one API, with sessions, …

    Python 775 84

  2. starter-kit starter-kit Public

    Open-source starter demos for HarnessRouter: run agent harnesses such as Codex and Claude Code as your product backend through one API.

    JavaScript 42 8

  3. skills skills Public

    Official skills for building agent-powered products with HarnessRouter.

    Python 5

  4. .github .github Public

Repositories

Showing 4 of 4 repositories
  • harnessrouter Public

    HarnessRouter Community Edition: the self-hosted, Apache-2.0 edition of the unified interface for agent harnesses. Run Codex, Claude Code, Hermes, PI, DSH, and more through one API, with sessions, streaming, files, cancellation, and failure handling. Implements the Unified Harness Protocol (UHP), an open standard. Your keys, your infrastructure.

    HarnessRouter/harnessrouter's past year of commit activity
    Python 775 Apache-2.0 84 3 1 Updated Sep 8, 2026
  • starter-kit Public

    Open-source starter demos for HarnessRouter: run agent harnesses such as Codex and Claude Code as your product backend through one API.

    HarnessRouter/starter-kit's past year of commit activity
    JavaScript 42 8 0 0 Updated Aug 29, 2026
  • skills Public

    Official skills for building agent-powered products with HarnessRouter.

    HarnessRouter/skills's past year of commit activity
    Python 5 Apache-2.0 0 0 1 Updated Aug 15, 2026
  • .github Public
    HarnessRouter/.github's past year of commit activity
    0 0 0 0 Updated Aug 15, 2026

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Most used topics

agent-api ai-agents