What is OpenAPI to Python Client Generator?
This tool converts OpenAPI/Swagger JSON specifications into Python HTTP client classes using the requests library. It generates a fully typed client class with methods for each API endpoint, including proper parameter handling, request body construction, and response parsing with type hints and docstrings.
How to Use
- Paste your OpenAPI 3.0 or Swagger 2.0 JSON specification into the input area
- Click "Generate" to create the Python client class
- Review the generated code with typed methods and docstrings
- Copy the output and save it as a .py file in your project
Why Use This Tool?
Tips & Best Practices
- Make sure your OpenAPI spec includes operationId for clean method names
- The generated client uses the requests library — install it with pip install requests
- Add authentication by passing an api_key parameter to the constructor
- You can customize the base URL when instantiating the client
Frequently Asked Questions
What OpenAPI versions are supported?
Both OpenAPI 3.0.x and Swagger 2.0 specifications are supported. The tool automatically detects the version from the "openapi" or "swagger" field in your spec.
How are $ref references handled?
The tool automatically resolves $ref references pointing to components/schemas. It follows the reference to extract the schema definition and uses it for type generation and request body construction.
What Python libraries are required?
The generated client only requires the "requests" library, which is the most popular HTTP library for Python. Type hints use the built-in "typing" module.
Does it support authentication?
The generated client constructor accepts an optional api_key parameter that sets up Bearer token authentication. You can extend the class to add other authentication methods like API keys in headers or basic auth.
Is my API spec sent to a server?
No, all processing happens entirely in your browser. Your OpenAPI specification never leaves your device.