opencode-agentrouter

OpenCode plugin for using AgentRouter models inside OpenCode.

How it works

The plugin patches globalThis.fetch at module load time. For any request to agentrouter.org it:

1. Injects identity headers — AgentRouter only allows requests from whitelisted coding-agent clients. The plugin adds the required headers so OpenCode is accepted.
2. Sanitizes Claude request bodies — Strips reasoning_effort, reasoning, and cache_control fields that AgentRouter rejects.
3. Injects adaptive thinking — Automatically sets thinking: { type: "adaptive" } for Claude models. Opus 4.7 requires adaptive thinking; older Claude models are upgraded from type: "enabled" (deprecated) to type: "adaptive".
4. Auto-retries on sensitive content errors — When AgentRouter returns sensitive_words_detected, the plugin retries with exponential backoff (up to 30 attempts).
5. Serializes Claude requests — Queues Claude model calls with cooldown to avoid rate limiting.

Requests to all other domains pass through untouched.

Install

Option A: npm plugin (recommended)

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

Add to your OpenCode config (~/.config/opencode/opencode.json). OpenCode installs npm plugins automatically.

Option B: local plugin

Copy dist/index.js to:

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

Files in the plugins directory are auto-loaded.

Configure provider

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["opencode-agentrouter"],
  "provider": {
    "agentrouter": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "AgentRouter",
      "options": {
        "baseURL": "https://agentrouter.org/v1",
        "apiKey": "sk-YOUR-KEY-HERE"
      },
      "models": {
        "claude-opus-4-6": {
          "name": "Claude Opus 4.6",
          "limit": { "context": 1000000, "output": 128000 },
          "reasoning": true
        },
        "claude-opus-4-7": {
          "name": "Claude Opus 4.7",
          "limit": { "context": 1000000, "output": 128000 },
          "reasoning": true
        },
        "deepseek-r1-0528": {
          "name": "DeepSeek R1 0528",
          "limit": { "context": 163840, "output": 16384 },
          "reasoning": true
        },
        "glm-5.1": {
          "name": "GLM 5.1",
          "limit": { "context": 202752, "output": 65535 },
          "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

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

Development

git clone https://github.com/TVD-00/opencode-agentrouter.git
cd opencode-agentrouter
npm install
npm run build

License

MIT