---
title: "acpx Opens a Structured JSON-RPC Bridge to Claude, Codex, and Gemini"
subtitle: "The openclaw team published acpx, an MIT-licensed TypeScript CLI that speaks the Agent Client Protocol so orchestrators can drive coding agents through structured messages."
url: "https://alphasignal.ai/news/acpx-opens-a-structured-json-rpc-bridge-to-claude-codex-and-gemini"
author: "AlphaSignal Newsroom"
author_url: "https://alphasignal.ai/editorial-team"
company: "AlphaSignal"
company_url: "https://alphasignal.ai/company/alphasignal"
published: "2026-05-03T15:19:57.000Z"
updated: "2026-08-22T09:59:53.568Z"
type: "Repo"
topics:
  - "Agents"
  - "Open Source"
subtopics:
  - "Agent Frameworks"
  - "Computer Use"
  - "Tool Use"
upvotes: 436
source_url: "https://github.com/openclaw/acpx"
comments: 0
truncated: true
---

# acpx Opens a Structured JSON-RPC Bridge to Claude, Codex, and Gemini

> The openclaw team published acpx, an MIT-licensed TypeScript CLI that speaks the Agent Client Protocol so orchestrators can drive coding agents through structured messages.

The [openclaw/acpx](https://github.com/openclaw/acpx) repository is now public on GitHub, shipping a headless command-line client for the [Agent Client Protocol](https://agentclientprotocol.com). acpx gives agents, orchestrators, and developers one structured interface for persistent sessions, one-shot runs, permissions, and machine-readable output. It is written in TypeScript, MIT-licensed, and published to npm as the `acpx` package.

The maintainers are upfront about the maturity level. acpx is in alpha and the CLI/runtime interfaces are likely to change, so anything you build downstream of this might break until it stabilizes. The README also notes it is an ACP client rather than a full orchestration framework, and links to a spec coverage roadmap that tracks which parts of the protocol are wired up.

## Killing the pseudo-terminal dance

Most coding agents today ship as terminal apps. If you want another program to drive them, you spawn a pseudo-terminal, feed it characters, and parse ANSI escape codes back out. ACP is a JSON-RPC style protocol that avoids that entirely, and acpx is the client half of that conversation. You talk to coding agents (Claude, Codex, Gemini, and others) over structured JSON-RPC instead of terminal scraping.

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## Sources

- [openclaw/acpx GitHub repository](https://github.com/openclaw/acpx)
- [acpx.sh landing page](https://acpx.sh/)
- [ACP Spec Coverage Roadmap](https://github.com/openclaw/acpx/blob/main/docs/2026-02-19-acp-coverage-roadmap.md)
- [acp-cli Rust port](https://github.com/motosan-dev/acp-cli)