To access the Qwen API, you can follow these steps:

1. **Sign Up for an Account**: First, you need to sign up for an account on the Alibaba Cloud platform if you haven't already. You can do this by visiting the [Alibaba Cloud website](https://www.alibabacloud.com/).

2. **Access the Dashboard**: Once you have an account, log in to the Alibaba Cloud dashboard.

3. **Navigate to the Qwen Service**: From the dashboard, navigate to the Qwen service page. This can typically be found under the "AI & Big Data" or "Machine Learning" section.

4. **Create an API Key**: To use the Qwen API, you will need to create an API key. This can usually be done from the API management section of the Qwen service page. Follow the instructions to generate a new API key.

5. **Review Documentation**: Alibaba Cloud provides comprehensive documentation for the Qwen API. Make sure to review the documentation to understand how to make API calls, what endpoints are available, and how to format your requests.

6. **Start Making API Calls**: With your API key and the documentation, you can start making API calls to interact with Qwen. You can use tools like Postman or write scripts in your preferred programming language to make HTTP requests to the Qwen API endpoints.

If you encounter any issues or have specific questions about the API, feel free to reach out to Alibaba Cloud support or consult the community forums for additional help.

For direct access to the API documentation and more detailed instructions, you can visit the official Qwen API documentation page: [Qwen API Documentation](https://help.aliyun.com/document_detail/2042798.html).