Interactive API Docs - Feature of FastAPI

Introduction to automatic UI documentation

One of the major benefits of FastAPI is that it is fully compatible with open standards for APIs, OpenAPI and JSON Schema. It provides an automatic UI generated for testing your entire API and its different routes. If you have previously used Postman, you will be able to see that the same thing is provided by FastAPI. Any API consumer can visit this UI to test all the routes and see what different parameters, header, body, etc. are required as well as the response from the API.

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