PromptLayer is a platform that allows users to track and manage their GPT prompt engineering. It acts as a middleware between code and OpenAI�s python library, recording all OpenAI API requests and allowing users to search and explore their request history in the PromptLayer dashboard. To use PromptLayer, users need to create an account and generate an API key. PromptLayer can then be installed using pip and used with OpenAI APIs with an additional argument of pl_toolTags, allowing users to track and group requests in the dashboard.