opencode-agentrouter

opencode-agentrouter

OpenCode plugin that lets you use AgentRouter models inside OpenCode.

AgentRouter provides access to Claude Opus, DeepSeek, GLM and other models through a unified API. This plugin handles the authentication handshake so OpenCode can connect without being blocked.

How it works

AgentRouter validates incoming requests against a whitelist of known coding-agent clients. Raw API calls are rejected with "unauthorized client detected". This plugin patches globalThis.fetch to inject the required client identity headers into every request targeting agentrouter.org — making OpenCode appear as an authorized client.

Install

Option A: npm plugin (recommended)

Add to your OpenCode config (~/.config/opencode/opencode.json or opencode.json):

{
  "plugin": ["opencode-agentrouter"]
}

OpenCode installs npm plugins automatically at startup.

Option B: local plugin

Copy dist/index.js into your plugins directory:

~/.config/opencode/plugins/agentrouter-auth.js

Files in the plugins directory are auto-loaded — no config needed.

Configure provider

Add the AgentRouter provider to your OpenCode config:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "agentrouter": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "AgentRouter",
      "options": {
        "baseURL": "https://agentrouter.org/v1",
        "apiKey": "sk-YOUR-KEY-HERE"
      },
      "models": {
        "claude-opus-4-7": {
          "name": "Claude Opus 4.7",
          "limit": { "context": 1000000, "output": 128000 },
          "reasoning": true
        },
        "glm-5.1": {
          "name": "GLM 5.1",
          "limit": { "context": 202752, "output": 65535 },
          "reasoning": true
        },
        "deepseek-r1-0528": {
          "name": "DeepSeek R1 0528",
          "limit": { "context": 163840, "output": 16384 },
          "reasoning": true
        }
      }
    }
  }
}

Get your API key at https://agentrouter.org/console/token

Available models

Model	Context	Output	Reasoning
claude-opus-4-6	1,000,000	128,000	yes
claude-opus-4-7	1,000,000	128,000	yes
deepseek-r1-0528	163,840	16,384	yes
deepseek-v3.1	163,840	32,768	no
deepseek-v3.2	131,072	32,768	no
glm-4.5	131,072	98,304	yes
glm-4.6	204,800	204,800	yes
glm-5.1	202,752	65,535	yes

Check https://agentrouter.org/pricing for the latest list.

Usage

• Install the plugin (Option A or B above)
• Add the provider config with your API key
• Restart OpenCode
• Run /models and select an AgentRouter model

How the plugin works

The plugin runs at module load time and patches globalThis.fetch. For any request to agentrouter.org, it injects headers that identify the caller as an authorized coding-agent client. Requests to all other domains pass through untouched.

No API keys are stored or transmitted by the plugin itself — it only adds identity headers. Your API key is managed by OpenCode's provider config as usual.

Development

git clone https://github.com/github-47303/opencode-agentrouter.git
cd opencode-agentrouter
npm install
npm run build

License

MIT