Grounded web search responses are model answers generated with live web search tools enabled across major LLM providers (such as Google Gemini, OpenAI GPT, and Anthropic Claude). When processing these responses, automated citation parsers extract the underlying web search queries, retrieve the full list of web source URLs from groundingChunks, and map specific text segments to their corresponding sources using metadata like groundingSupports. For platforms like Vertex AI, the system also handles URL canonicalization by resolving intermediate vertexaisearch redirect URIs to their true destination domains, generating structured, normalized citation data for visibility tracking.