OpenAI's "Function Calling" is a transformative yet underappreciated feature that enables the conversion of unstructured data into structured data, a critical task in data processing and entry jobs worldwide. This feature allows users to define functions in a structured JSON format, specifying names, descriptions, and parameters, enabling GPT to select the appropriate function based on a given prompt and fill out custom forms using contextual reasoning. Function Calling can be applied to various tasks such as data extraction, scoring, categorization, option selection, and filtering, making it a versatile tool for automating workflows. The feature's potential is highlighted through use cases like extracting emails from contest submissions, scoring sales leads, categorizing news articles, selecting the most relevant AI news from forums, and filtering submissions based on specific conditions. AgentHub, a Y Combinator-backed startup, leverages Function Calling to offer a no-code platform for automating complex workflows with AI, demonstrating its practical applications in diverse scenarios.