OpenAPI 3.x Express Middleware

exegesis-express provides Express middleware for handling OpenAPI 3.x API definitions, acting as a wrapper around the core `exegesis` library. It offers full support for OpenAPI 3.x.x features including request body parsing (JSON, form-urlencoded), response validation, authentication, and extensibility via a plugin system and custom format validation. The current stable version is 4.0.0, released in December 2021. While not on a fixed release cadence, it typically updates in conjunction with its parent `exegesis` library, incorporating bug fixes, security patches, and Node.js version support changes. Key differentiators include comprehensive OpenAPI 3.x conformance, flexible middleware placement, and robust error handling for API-driven applications.