# OpenRouter

OpenRouter is a unified API service that consolidates access to numerous language models through a single endpoint and authentication key. The platform maintains OpenAI compatibility, enabling users to leverage existing OpenAI SDKs by simply modifying the base URL configuration.

## Setup Instructions

**Command line onboarding:**

```bash
openclaw onboard --auth-choice apiKey --token-provider openrouter --token "$OPENROUTER_API_KEY"
```

**Configuration example:**

```json5
{
  env: { OPENROUTER_API_KEY: "sk-or-..." },
  agents: {
    defaults: {
      model: { primary: "openrouter/anthropic/claude-sonnet-4-5" },
    },
  },
}
```

## Key Points

- Model identifiers follow the format: `openrouter/<provider>/<model>`
- Additional model and provider options are documented in the model-providers concepts section
- Authentication uses Bearer token methodology with your API key