ClaudeCode-Custom-Skills/skills/openrouter-config/README.md

OpenRouter Config Skill

Description

This skill helps users configure and enable OpenRouter as the AI provider in Claude Code. It allows you to select your preferred OpenRouter model, sets up the API key, configures Anthropic-compatible API endpoints, and ensures Claude Code uses OpenRouter exclusively with proper failover capabilities.

Documentation Source

Based on official OpenRouter documentation: https://openrouter.ai/docs/guides/claude-code-integration

Why Use OpenRouter with Claude Code?

1. Provider Failover for High Availability

Anthropic's API occasionally experiences outages or rate limiting. When you route Claude Code through OpenRouter, your requests automatically fail over between multiple Anthropic providers. If one provider is unavailable or rate-limited, OpenRouter seamlessly routes to another, keeping your coding sessions uninterrupted.

2. Access to 100+ Models

OpenRouter gives you access to models from multiple providers including:

• Anthropic: Claude 3.5 Sonnet, Claude 3 Opus, Claude 3 Haiku
• OpenAI: GPT-4, GPT-4 Turbo, GPT-3.5
• Google: Gemini Pro, Gemini Flash
• Meta: Llama 2, Llama 3
• Mistral: Mixtral, Mistral Large
• And many more: xAI, Perplexity, Cohere, etc.

3. Organizational Budget Controls

For teams and organizations, OpenRouter provides centralized budget management. You can set spending limits, allocate credits across team members, and prevent unexpected cost overruns.

4. Usage Visibility and Analytics

OpenRouter gives you complete visibility into how Claude Code is being used across your team. Track usage patterns, monitor costs in real-time, and understand which projects or team members are consuming the most resources. All of this data is available in your OpenRouter Activity Dashboard.

Usage

To use this skill, simply ask Claude Code to configure OpenRouter. The skill will:

1. Ask you which OpenRouter model you want to use
2. Provide a link to browse available models
3. Guide you to copy the model name from OpenRouter's model catalog
4. Set up your OpenRouter API key
5. Configure Anthropic-compatible environment variables
6. Ensure Claude Code uses OpenRouter exclusively
7. Set up proper provider priority
8. Verify the configuration is working

Prerequisites

• An OpenRouter API key (get one from https://openrouter.ai/keys)
• Claude Code installed

Model Selection

Step 1: Browse Available Models

Visit the OpenRouter models catalog to choose your preferred model:

• OpenRouter Models: https://openrouter.ai/models

Step 2: Find and Copy Your Model

Browse through the available models and click on any model to see:

• Model name (click to copy)
• Pricing (input/output tokens)
• Context length
• Features (function calling, vision, etc.)
• Provider information

Popular Model Examples:

Model	Provider	Best For
anthropic/claude-3.5-sonnet	Anthropic	General coding, reasoning
anthropic/claude-3.5-sonnet:beta	Anthropic	Latest Claude features
openai/gpt-4-turbo	OpenAI	Fast, cost-effective
google/gemini-pro-1.5	Google	Long context
meta-llama/llama-3.1-70b-instruct:free	Meta	Free tier available
mistralai/mistral-large	Mistral	Multilingual

Step 3: Configure Your Chosen Model

The skill will ask you to paste the model name you selected. You can also change the model later by editing your Claude Code settings.

Configuration Steps

Step 1: Install Claude Code (if not already installed)

# macOS, Linux, WSL:
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell:
irm https://claude.ai/install.ps1 | iex

Step 2: Configure Environment Variables

The skill will help you set these environment variables in your shell profile:

# Add to ~/.zshrc (or ~/.bashrc for Bash, ~/.config/fish/config.fish for Fish)
export OPENROUTER_API_KEY="<your-openrouter-api-key>"
export ANTHROPIC_BASE_URL="https://openrouter.ai/api"
export ANTHROPIC_AUTH_TOKEN="$OPENROUTER_API_KEY"
export ANTHROPIC_API_KEY="" # Important: Must be explicitly empty

Important Notes:

• Do NOT put these in a project-level .env file - the native Claude Code installer does not read standard .env files
• Must explicitly blank out ANTHROPIC_API_KEY to prevent conflicts
• If previously logged in to Claude Code with Anthropic, run /logout in a Claude Code session to clear cached credentials

Step 3: Configure Your Model

The skill will add your chosen model to your Claude Code settings at ~/.claude/settings.json:

{
  "provider": {
    "baseUrl": "https://openrouter.ai/api",
    "apiKey": "${ANTHROPIC_AUTH_TOKEN}",
    "defaultModel": "your-chosen-model-name"
  }
}

Step 4: Start Claude Code

cd /path/to/your/project
claude

Step 5: Verify Configuration

Run the /status command inside Claude Code:

/status

Expected output:

Auth token: ANTHROPIC_AUTH_TOKEN
Anthropic base URL: https://openrouter.ai/api

You can also check the OpenRouter Activity Dashboard to see your requests appearing in real-time.

API Configuration

Base URL

https://openrouter.ai/api

Authentication

Use your OpenRouter API key as the auth token.

Model Selection

Choose your model from the OpenRouter model catalog:

• Browse Models: https://openrouter.ai/models
• Click on any model to see details and copy the model name
• Paste the model name when prompted by this skill

Provider Priority

Important: Claude Code with OpenRouter is only guaranteed to work with the Anthropic first-party provider. For maximum compatibility, we recommend setting Anthropic 1P as the top priority provider when using Claude Code.

Supported Models

OpenRouter supports 100+ models from various providers. Browse the full catalog:

• OpenRouter Models: https://openrouter.ai/models

Popular Anthropic Models:

• anthropic/claude-3.5-sonnet - Latest, most capable
• anthropic/claude-3-opus - Best for complex tasks
• anthropic/claude-3-haiku - Fast, cost-effective

Popular Alternative Models:

• openai/gpt-4-turbo - GPT-4 with Turbo speed
• google/gemini-pro-1.5 - Long context (up to 1M tokens)
• meta-llama/llama-3.1-70b-instruct:free - Free Llama 3 model
• mistralai/mistral-large - Strong multilingual capabilities

How It Works

Direct Connection

When you set ANTHROPIC_BASE_URL to https://openrouter.ai/api, Claude Code speaks its native protocol directly to OpenRouter. No local proxy server is required.

Anthropic Skin

OpenRouter's "Anthropic Skin" behaves exactly like the Anthropic API. It handles model mapping and passes through advanced features like "Thinking" blocks and native tool use.

Model Routing

When you specify a model name from the OpenRouter catalog, OpenRouter routes your request to the appropriate provider automatically, handling all API differences transparently.

Billing

You are billed using your OpenRouter credits. Usage (including reasoning tokens) appears in your OpenRouter dashboard.

Security

The skill handles your API key securely and stores it in your shell environment with appropriate file permissions.

Privacy Note: OpenRouter does not log your source code prompts unless you explicitly opt-in to prompt logging in your account settings. See their Privacy Policy for details.

Changing Models

You can change your model at any time by:

Option 1: Update Claude Code Settings

Edit ~/.claude/settings.json:

{
  "provider": {
    "baseUrl": "https://openrouter.ai/api",
    "apiKey": "${ANTHROPIC_AUTH_TOKEN}",
    "defaultModel": "new-model-name"
  }
}

Option 2: Use the Skill Again

Run the configuration process again and select a different model when prompted.

Option 3: Per-Session Model Selection

In Claude Code, you can sometimes specify models inline:

/model openrouter:your-model-name

Advanced Features

Cost Tracking Statusline

You can add a custom statusline to Claude Code that tracks your OpenRouter API costs in real-time. The statusline displays provider, model, cumulative cost, and cache discounts for your session.

Download the statusline scripts from the openrouter-examples repository, make them executable, and add the following to your ~/.claude/settings.json:

{
  "statusLine": {
    "type": "command",
    "command": "/path/to/statusline.sh"
  }
}

GitHub Action Integration

You can use OpenRouter with the official Claude Code GitHub Action. To adapt the example workflow for OpenRouter, make two changes to the action step:

1. Pass your OpenRouter API key via anthropic_api_key (store it as a GitHub secret named OPENROUTER_API_KEY)
2. Set the ANTHROPIC_BASE_URL environment variable to https://openrouter.ai/api

Example:

- name: Run Claude Code
  uses: anthropics/claude-code-action@v1
  with:
    anthropic_api_key: ${{ secrets.OPENROUTER_API_KEY }}
  env:
    ANTHROPIC_BASE_URL: https://openrouter.ai/api

Agent SDK Integration

The Anthropic Agent SDK lets you build AI agents programmatically using Python or TypeScript. Since the Agent SDK uses Claude Code as its runtime, you can connect it to OpenRouter using the same environment variables described above.

Troubleshooting

Model Not Found Errors

• Verify the model name is copied exactly from OpenRouter's model catalog
• Check that the model is currently available on OpenRouter
• Some models may have different naming conventions (e.g., with :free, :beta suffixes)

Auth Errors

• Ensure ANTHROPIC_API_KEY is set to an empty string ("")
• If it is unset (null), Claude Code might fall back to its default behavior and try to authenticate with Anthropic servers

Context Length Errors

• If you hit context limits, consider switching to a model with larger context window
• Break your task into smaller chunks or start a new session
• Check the model's context limit at https://openrouter.ai/models

Previous Anthropic Login

• If you were previously logged in to Claude Code with Anthropic, run /logout in a Claude Code session to clear cached credentials before the OpenRouter configuration takes effect

Connection Issues

• Verify your OpenRouter API key is correct
• Check that environment variables are set in your shell profile (not just in current session)
• Ensure you've restarted your terminal after updating your shell profile
• Run /status to verify configuration

Related Skills

• API Key Management
• Provider Configuration
• Model Selection
• Cost Tracking

Example Commands

• "Configure OpenRouter with my API key"
• "Set up OpenRouter as my AI provider for Claude Code"
• "Enable OpenRouter in Claude Code"
• "Configure OpenRouter with Claude 3.5 Sonnet"
• "I want to use GPT-4 through OpenRouter"
• "Help me select and configure an OpenRouter model"

Notes

• This skill is designed specifically for Claude Code
• It requires write access to your shell profile (~/.bashrc, ~/.zshrc, or ~/.config/fish/config.fish)
• The skill ensures OpenRouter is used exclusively with Anthropic 1P as top priority
• You can browse and select from 100+ models at https://openrouter.ai/models
• You can change your model at any time by editing ~/.claude/settings.json or running this skill again
• You can revert to using Anthropic directly by removing these environment variables and running /logout
• Always refer to the official OpenRouter documentation for the most up-to-date information