Postman & OpenAI API For Developers: OpenAI Developers Guide

About this course

This course is made for anyone who wants to move from “I know what ChatGPT is” to “I can use OpenAI tools to create real developer workflows, test APIs, and ship working features.”

If you are an open ai developer, or planning to become one, this course gives you a clear, step-by-step path to working with the ChatGPT API using the Postman app and real developer methods.

You will not just watch concepts. You will practice how developers actually work with OpenAI tools in real projects.

Most people stop at basic prompts inside ChatGPT. This course takes you further. You will learn how to create API requests, test them, adjust them, track costs, and use models in a way that fits real products, websites, apps, and automation systems.

By the end of this course, you will understand how OpenAI models work behind the scenes, how to send requests from Postman, how to control output with prompts, how to manage tokens and pricing, and how to test responses before moving to production code.

You will start with the basics, even if you have never worked with APIs before. You will learn what HTTP is, how JSON works, and how requests and responses flow between your system and OpenAI’s servers. This foundation helps you avoid mistakes that cost time, money, and broken apps later.

Then you move into hands-on work. You will create your own OpenAI account, generate API keys, and connect Postman to OpenAI. You will send live requests to ChatGPT models, test different settings, and see how changes affect the output.

You will also learn how GPT 3.5 and GPT 4 work in real API calls, how image generation works with DALL·E, and how speech-to-text works with Whisper. These are real skills that chatgpt developer roles expect you to understand.

A big focus of this course is control. You will learn how to shape responses using system prompts, temperature settings, and token limits. This helps you create AI output that is useful, clean, and ready for real users.

You will also learn how to

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