ばりっどーぬ - OpenAPI Valid Dog is a Chrome DevTools extension designed for real-time monitoring of API traffic and automatic validation of requests and responses based on OpenAPI specifications. This tool is particularly useful for developers who need to ensure that their web applications are communicating correctly with APIs during development. It captures all HTTP communication while DevTools is open, allowing for immediate insights into the performance and correctness of API interactions.

Key features include real-time traffic monitoring, automatic validation against OpenAPI specs in YAML or JSON formats, and powerful filtering options to display only relevant traffic or validation errors. The extension supports both English and Japanese, making it accessible to a wider audience. With its focus on local processing, it ensures that all data remains private and secure, stored only in the browser's local storage.