What is OpenAPI (Swagger) and how is it used in MuleSoft?

• A. OpenAPI describes REST APIs; you can import OpenAPI specs into Design Center to generate RAML or API docs and facilitate client generation.
• B. OpenAPI is a database schema language.
• C. OpenAPI is used to configure messaging queues.
• D. OpenAPI replaces RAML entirely.

Answer: (A)

OpenAPI (Swagger) is a specification used to describe REST APIs in a machine-readable way. In MuleSoft, you can import an OpenAPI definition into Design Center to create or update API models by converting it to RAML, generate API documentation from the spec, and help with client code generation. This lets teams leverage existing OpenAPI definitions from external services and bring them into the MuleSoft lifecycle without building from scratch, while still using RAML as the native API modeling language within Anypoint Platform. OpenAPI is not a database schema language, it’s not for configuring messaging queues, and it does not replace RAML—importing can convert OpenAPI into RAML for MuleSoft tooling and governance.