System: As an API testing assistant, analyze API specifications and previous test results to generate new, unused parameters. Avoid using any parameters from the previous attempts. Return only the parameter dictionary.
User: API Specification:
URL: https://proxy12.p.rapidapi.com/proxy
Method: GET
Required Parameters: [{'name': 'url', 'type': 'STRING', 'description': 'The URL you want to visit.', 'default': 'http://api.ipify.org/'}]
Optional Parameters: [{'name': 'headers', 'type': 'STRING', 'description': 'The headers you want to set. Ensure they are in JSON format.', 'default': ''}, {'name': 'query', 'type': 'STRING', 'description': 'The query parameters you want to set. Ensure they are in JSON format.', 'default': ''}]
Previous attempts: Initial Attempt 1:
Parameters: {'headers': '{"User -Agent": "Mozilla/5.0", "Accept": "application/json"}', 'query': '{"key1": "value1", "key2": "value2"}'}
Result: Success
Analysis: Success - parameters worked well

Initial Attempt 2:
Parameters: {'headers': '{"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36", "Accept": "application/json"}', 'query': '{"param1": "newValue1", "param2": "newValue2"}'}
Result: Success
Analysis: Success - parameters worked well

Recent Attempt 3:
Parameters: {'headers': '{"Authorization": "Bearer your_token_here", "Content-Type": "application/json"}', 'query': '{"param3": "value3", "param4": "value4"}'}
Result: Success
Analysis: Success - parameters worked well

Recent Attempt 4:
Parameters: {'headers': '{"User -Agent": "Mozilla/5.0 (Linux; Android 10; Pixel 3 XL) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Mobile Safari/537.36", "Accept": "application/xml"}', 'query': '{"filter": "active", "sort": "desc"}'}
Result: Success
Analysis: Success - parameters worked well

Recent Attempt 5:
Parameters: {'url': 'http://api.ipify.org/', 'headers': '{"User -Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Safari/605.1.15", "Accept": "application/json"}', 'query': '{"newParam1": "newValue1", "newParam2": "newValue2"}'}
Result: Success
Analysis: Success - parameters worked well

Already used parameters: - {'headers': '{"User -Agent": "Mozilla/5.0", "Accept": "application/json"}', 'query': '{"key1": "value1", "key2": "value2"}'}
- {'headers': '{"Authorization": "Bearer your_token_here", "Content-Type": "application/json"}', 'query': '{"param3": "value3", "param4": "value4"}'}
- {'headers': '{"User -Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Safari/605.1.15", "Accept": "application/json"}', 'query': '{"newParam1": "newValue1", "newParam2": "newValue2"}', 'url': 'http://api.ipify.org/'}
- {'headers': '{"User -Agent": "Mozilla/5.0 (Linux; Android 10; Pixel 3 XL) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Mobile Safari/537.36", "Accept": "application/xml"}', 'query': '{"filter": "active", "sort": "desc"}'}
- {'headers': '{"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36", "Accept": "application/json"}', 'query': '{"param1": "newValue1", "param2": "newValue2"}'}

Rules:
1. If required_parameters is empty and you choose not to use optional parameters, return empty dict.
2. If using optional parameters, only use parameters exactly as defined in optional_parameters.
3. Do not create new parameters that are not in the specification.

Generate valid parameters:
Assistant: