Google Sheets AI Agent: Chat-Triggered Data Query Agent with Structured Output Parsing

Problem:

A team needed a conversational interface to query and interact with data stored in Google Sheets, instead of manually filtering rows, cross-referencing columns, or writing lookup formulas every time they needed an answer from their data.

Solution: Built an n8n chat-triggered AI agent connected directly to Google Sheets as a live tool, the agent receives natural language questions, reads the relevant sheet data in real time, processes the response through a dual-model setup (OpenAI Chat Model with a fallback OpenAI Chat Model1) and runs the output through both an auto-fixing output parser and a structured output parser to guarantee clean, consistent responses regardless of query complexity.

Result:

Delivered a conversational data assistant that lets any team member query Google Sheets in plain language and receive structured, accurate answers instantly, eliminating the need for manual spreadsheet navigation or formula knowledge.