What is PromptMage?

PromptMage is a Python framework that streamlines the creation of multi‑step LLM applications by providing built‑in prompt version control, an intuitive playground, and an automatically generated FastAPI interface. Developers can test, compare, and iterate prompts quickly in a visual playground that records all prompt history.

The framework supports manual and automatic evaluation, enabling reliable performance checks before deployment. Teams benefit from collaborative editing and integrated version tracking, while enterprises can self‑host the solution on local or server infrastructure.

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Based on 1 review, 100.0% of users recommend PromptMage, rated highly for quality results.

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PromptMage's key features

Built-in prompt version control
Prompt Playground interface
Auto-generated FastAPI API
Evaluation mode: manual and auto testing
Type‑hinting for inference validation
Self‑hosted LLM workflow solution
Multi‑step application support

PromptMage use cases

Build a multi-step customer support chatbot pipeline with PromptMage, automatically versioning prompts and deploying a FastAPI endpoint for real-time responses
Collaboratively design and test a complex financial risk assessment workflow using PromptMage's visual playground and automated evaluation metrics to ensure compliance
Generate and iterate on a dynamic email marketing copy generator, leveraging PromptMage's prompt version control and fast API integration for seamless A/B testing