Build a Nutrition Custom GPT

Short summary

This tutorial walks through creating a Custom GPT that uses Dietly's OpenAPI schema as an Action to fetch real nutrition data instead of guessing. The key instruction design forces the model to always call the search action and forbids inventing missing values. It covers authentication setup, preview testing for edge cases, and maintenance when the API schema changes.

• •Import Dietly's OpenAPI spec as a Custom GPT Action for live food lookups
• •Instruction design forces retrieval and prohibits fabricated nutrition values
• •Covers auth setup, preview testing, and ongoing schema maintenance

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