Which tool can you use to design APIs in MuleSoft?

Anypoint Design Center is the correct choice for designing APIs in MuleSoft. This tool offers a user-friendly interface that allows developers to create, design, and document APIs visually. Utilizing RAML or OAS (OpenAPI Specification), users can build API definitions from scratch or by importing existing specifications. The design center also supports versioning and collaboration among teams, making it an effective tool for API development that adheres to best practices and standards.

While other options like Mule Project Builder, API Management Dashboard, and API Gateway Console play important roles in the broader API management ecosystem, they are not specifically focused on the initial design stage of APIs. Mule Project Builder is geared towards building Mule applications, API Management Dashboard focuses on monitoring and controlling APIs after they are published, and API Gateway Console provides functionality for traffic management and security once APIs are operational. Therefore, Anypoint Design Center stands out as the dedicated tool for API design within the MuleSoft suite.