Portkey provides a robust and secure gateway to facilitate the integration of various Large Language Models (LLMs) into your applications, including OpenRouter. With Portkey, you can take advantage of features like fast AI gateway access, observability, prompt management, and more, all while ensuring the secure management of your LLM API keys through a virtual key system.
Provider Slug. openrouter

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Portkey SDK Integration with OpenRouter Models

Portkey provides a consistent API to interact with models from various providers. To integrate OpenRouter with Portkey:

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1. Install the Portkey SDK

Add the Portkey SDK to your application to interact with OpenRouter AI’s API through Portkey’s gateway. 
npm install --save portkey-ai

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2. Initialize Portkey with the Virtual Key

To use OpenRouter with Portkey, get your API key from here, then add it to Portkey to create the virtual key. 
import Portkey from 'portkey-ai'

const portkey = new Portkey({
    apiKey: "PORTKEY_API_KEY", // defaults to process.env["PORTKEY_API_KEY"]
    provider:"@PROVIDER" // Your OpenRouter Virtual Key
})

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3. Invoke Chat Completions with OpenRouter

Use the Portkey instance to send requests to OpenRouter. You can also override the virtual key directly in the API call if needed. 
const chatCompletion = await portkey.chat.completions.create({
    messages: [{ role: 'user', content: 'Say this is a test' }],
    model: 'openai/gpt-4o-2024-08-06',
});

console.log(chatCompletion.choices);

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Open Router Tool Calling

Tool calling feature lets models trigger external tools based on conversation context. You define available functions, the model chooses when to use them, and your application executes them and returns results. Portkey supports Open Router Tool Calling and makes it interoperable across multiple providers. With Portkey Prompts, you can templatize various your prompts & tool schemas as well.

Open Router Tool Calling
Get Weather Tool
let tools = [{
    type: "function",
    function: {
        name: "getWeather",
        description: "Get the current weather",
        parameters: {
            type: "object",
            properties: {
                location: { type: "string", description: "City and state" },
                unit: { type: "string", enum: ["celsius", "fahrenheit"] }
            },
            required: ["location"]
        }
    }
}];

let response = await portkey.chat.completions.create({
    model: "openai/gpt-4o",
    messages: [
        { role: "system", content: "You are a helpful assistant." },
        { role: "user", content: "What's the weather like in Delhi - respond in JSON" }
    ],
    tools,
    tool_choice: "auto",
});

console.log(response.choices[0].finish_reason);
The complete list of features supported in the SDK are available on the link below.

SDK