Connect your agent - AgentMuxer

For Codex, Claude Code, OpenCode, and other coding agents, paste this line into your agent:

Set up AgentMuxer from https://agentmuxer.com/SKILL.md

Install

Your agent runs the AgentMuxer installer. It connects every supported coding agent on your machine to AgentMuxer and adds guidance to call a known API directly or search the free catalog when a task needs external tools or information.To run setup yourself in a terminal with Node.js 22.18 or later and npm:

npx -y @agentmuxer/cli@latest install

To set up only some clients, add --client codex, --client claude-code, or --client opencode. Repeat the flag to choose several.

Sign-in is required for free and paid use. Each client signs in to AgentMuxer with OAuth in your browser and keeps its own sign-in.

When your agent runs setup, it relays each step for you as an Owner action: line. Follow them in order. They include approving sign-in and, depending on the client, one command that continues the same conversation: /reload-plugins in Claude Code, codex resume in Codex, or opencode -c in OpenCode.
When you run setup in a terminal, it signs in the AgentMuxer CLI, then opens each signed-out client’s browser sign-in, one at a time.

Existing settings and sign-ins are preserved, and running install again updates AgentMuxer’s guidance in place.

Try it

After the sign-in steps, paste this prompt. After a terminal setup, start your coding agent and paste it there. For connector clients, start a new conversation.

Use AgentMuxer to find tools that could help with this project. Recommend one, explain what it does and its price, and don't execute a paid call.

This first prompt explores the catalog without buying a tool call. Next, give your agent a task.

Use AgentMuxer from a terminal

The agentmuxer command searches, inspects, and calls APIs from a terminal or script. Install it globally and sign in:

npm install -g @agentmuxer/cli
agentmuxer login
agentmuxer search --query "web search API"

agentmuxer login --no-browser prints the sign-in URL and code instead of opening a browser. Without a global install, prefix commands with npx -y @agentmuxer/cli@latest. See the CLI README for every command.

Other clients and manual setup

The installer also adds reusable guidance. Manual MCP registration adds the connection only. Every client below starts the OAuth sign-in when it first connects.

In your platform’s connector settings, add a custom connector with this URL, then complete sign-in:

https://mcp.agentmuxer.com/mcp

Start a new conversation after connecting. Custom connector availability depends on your platform and plan.

Run both commands; the second opens browser sign-in. Then restart open Codex sessions.

codex mcp add agentmuxer --url https://mcp.agentmuxer.com/mcp
codex mcp login agentmuxer

Run both commands; the second opens browser sign-in. Then restart open Claude Code sessions.

claude mcp add agentmuxer --transport http https://mcp.agentmuxer.com/mcp
claude mcp login agentmuxer

Add this to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (one project), preserving any existing servers. Complete sign-in when Cursor connects.

{
  "mcpServers": {
    "agentmuxer": { "url": "https://mcp.agentmuxer.com/mcp" }
  }
}

Add this to .vscode/mcp.json, preserving any existing servers. Complete sign-in when VS Code connects.

{
  "servers": {
    "agentmuxer": {
      "type": "http",
      "url": "https://mcp.agentmuxer.com/mcp"
    }
  }
}

Add the server, then run /mcp auth agentmuxer in Gemini CLI to sign in:

gemini mcp add -s user --transport http agentmuxer https://mcp.agentmuxer.com/mcp

SKILL.md has setup steps for more agents, and setup.md collects the manual recipes.

Manage the connection

Check setup or reconnect

Run the status command:

npx -y @agentmuxer/cli@latest status

It prints one line per client and the CLI sign-in. Follow any Owner action: line it prints to finish setup or sign in again. For client errors or interrupted sign-in, see troubleshooting.

Remove the installer-managed connection

npx -y @agentmuxer/cli@latest remove

This removes the installer-managed guidance and removes or disables its connection. Restart open clients afterward. For a manually added connector, remove it in the client’s settings.

Moving from @agentmuxer/setup

@agentmuxer/cli replaces @agentmuxer/setup. Run npx -y @agentmuxer/cli@latest install to update your clients and guidance.

Building and distributing your own agent? Use an application API key with the SDK. That flow does not require browser sign-in for each run.

​Use AgentMuxer from a terminal

​Other clients and manual setup

​Manage the connection

Use AgentMuxer from a terminal

Other clients and manual setup

Manage the connection