Openrouter Typescript Sdk

# OpenRouter TypeScript SDK

A comprehensive TypeScript SDK for interacting with OpenRouter's unified API, providing access to 300+ AI models through a single, type-safe interface. This skill enables AI agents to leverage the `callModel` pattern for text generation, tool usage, streaming, and multi-turn conversations.

---

## Installation

```bash
npm install @openrouter/sdk
```

## Setup

Get your API key from [openrouter.ai/settings/keys](https://openrouter.ai/settings/keys), then initialize:

```typescript
import OpenRouter from '@openrouter/sdk';

const client = new OpenRouter({
  apiKey: process.env.OPENROUTER_API_KEY
});
```

---

## Authentication

The SDK supports two authentication methods: API keys for server-side applications and OAuth PKCE flow for user-facing applications.

### API Key Authentication

The primary authentication method uses API keys from your OpenRouter account.

#### Obtaining an API Key

1. Visit [openrouter.ai/settings/keys](https://openrouter.ai/settings/keys)
2. Create a new API key
3. Store securely in an environment variable

#### Environment Setup

```bash
export OPENROUTER_API_KEY=sk-or-v1-your-key-here
```

#### Client Initialization

```typescript
import OpenRouter from '@openrouter/sdk';

const client = new OpenRouter({
  apiKey: process.env.OPENROUTER_API_KEY
});
```

The client automatically uses this key for all subsequent requests:

```typescript
// API key is automatically included
const result = client.callModel({
  model: 'openai/gpt-5-nano',
  input: 'Hello!'
});
```

#### Get Current Key Metadata

Retrieve information about the currently configured API key:

```typescript
const keyInfo = await client.apiKeys.getCurrentKeyMetadata();
console.log('Key name:', keyInfo.name);
console.log('Created:', keyInfo.createdAt);
```

#### API Key Management

Programmatically manage API keys:

```typescript
// List all keys
const keys = await client.apiKeys.list();

// Create a new key
const newKey = await client.apiKeys.create({
  name: 'Production API Key'
});

// Get a specific key by hash
const key = await client.apiKeys.get({
  hash: 'sk-or-v1-...'
});

// Update a key
await client.apiKeys.update({
  hash: 'sk-or-v1-...',
  requestBody: {
    name: 'Updated Key Name'
  }
});

// Delete a key
await client.apiKeys.delete({
  hash: 'sk-or-v1-...'
});
```

### OAuth Authentication (PKCE Flow)

For user-facing applications where users should control their own API keys, OpenRouter supports OAuth with PKCE (Proof Key for Code Exchange). This flow allows users to generate API keys through a browser authorization flow without your application handling their credentials.

#### createAuthCode

Generate an authorization code and URL to start the OAuth flow:

```typescript
const authResponse = await client.oAuth.createAuthCode({
  callbackUrl: 'https://myapp.com/auth/callback'
});

// authResponse contains:
// - authorizationUrl: URL to redirect the user to
// - code: The authorization code for later exchange

console.log('Redirect user to:', authResponse.authorizationUrl);
```

**Parameters:**

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `callbackUrl` | `string` | Yes | Your application's callback URL after user authorization |

**Browser Redirect:**

```typescript
// In a browser environment
window.location.href = authResponse.authorizationUrl;

// Or in a server-rendered app, return a redirect response
res.redirect(authResponse.authorizationUrl);
```

#### exchangeAuthCodeForAPIKey

After the user authorizes your application, they are redirected back to your callback URL with an authorization code. Exchange this code for an API key:

```typescript
// In your callback handler
const code = req.query.code;  // From the redirect URL

const apiKeyResponse = await cl