Client SDKs

npm install @openrouter/sdk

pnpm add @openrouter/sdk

yarn add @openrouter/sdk

bun add @openrouter/sdk

deno add npm:@openrouter/sdk

pip install openrouter

go get github.com/OpenRouterTeam/go-sdk

import { OpenRouter } from '@openrouter/sdk';

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

const response = await client.responses.send({
  responsesRequest: {
    model: 'openai/gpt-5.2',
    input: 'Explain quantum computing in one sentence.',
  },
});

if (!('output' in response)) {
  throw new Error('Expected a non-streaming response');
}
if (response.status !== 'completed') {
  throw new Error(response.error?.message ?? `Response ended as ${response.status}`);
}

const message = [...response.output].reverse().find((item) => item.type === 'message');
console.log(message?.content.find((part) => part.type === 'output_text')?.text);

from openrouter import OpenRouter
import os

with OpenRouter(api_key=os.getenv("OPENROUTER_API_KEY")) as client:
    response = client.responses.send(
        model="openai/gpt-5.2",
        input="Explain quantum computing in one sentence.",
    )
    if response.status != "completed":
        message = response.error.message if response.error else f"Response ended as {response.status}"
        raise RuntimeError(message)

    message = next(item for item in reversed(response.output) if item.type == "message")
    print(next(part.text for part in message.content if part.type == "output_text"))