Input data is not in the correct format: expected a list of messages but received incorrect structure.

To resolve the 400 status error in the Azure OpenAI API, you need to address several potential issues:

Ensure your API key and credentials are correct, not expired, and properly configured. Verify that the payload sent in the API request is well-formed and conforms to the expected format.

Here are some key steps to take:

• Verify API Key and Credentials: Check the OpenAI Developer Dashboard to ensure the API key matches and is not expired.

• Check Payload: Ensure the data sent is within the allowed size limits and correctly formatted.

• Review Rate Limiting: Make sure you are not exceeding the API request rate limits.

• Inspect Network and Configuration: Verify the base URL and headers, especially the Authorization field.

• Check for Hidden Characters: Ensure there are no hidden characters in the API key or payload.

• Confirm Endpoint and Deployment: Use the correct endpoint URL and deployment name.

• Authenticate Correctly: Ensure proper authentication using Azure Entra ID or other required authentication methods.

By addressing these areas, you should be able to identify and fix the cause of the 400 error.