Incident.io has developed an efficient API setup using Goa, a design-first API framework, to address the challenges of scaling their product's API infrastructure. Initially, their API setup involved manually written handlers and ad hoc struct definitions, which became unsustainable as the company grew. By leveraging Goa, they transitioned to a structured approach where APIs are defined in a Domain Specific Language (DSL), allowing Goa to generate boilerplate code, HTTP handlers, validation logic, typed service interfaces, OpenAPI documentation, and basic Go clients automatically. This transition has streamlined their API development process, reduced the risk of errors, and allowed for more focus on business logic rather than boilerplate code. Additionally, incident.io enhances Goa's output by generating specialized client libraries for different audiences, including TypeScript interfaces for the frontend and lean mobile clients, ensuring type safety and efficient API interactions. This automated and modular approach has enabled them to move faster, focus on product development, and maintain a scalable API infrastructure.