oas3-tools

A middleware library for Express.js that provides Swagger UI and API request validation/routing based on OpenAPI 3.0 specifications. Current version 2.2.3 (as of 2023) is in maintenance mode with infrequent updates. It is a fork of the deprecated apigee-127/swagger-tools, adding OpenAPI 3 support. Key differentiators: integrates Swagger UI, request validation, and routing into one Express middleware. However, the project has limited community support and may have compatibility issues with newer Node.js versions. Alternatives include express-openapi-validator or swagger-ui-express.