Achieving 100% Type Safety with OpenAPI and TypeScript

Type safety is not just about catching errors at compile time - it's about creating a development experience where your IDE guides you and prevents mistakes before they happen. With Swagger to TanStack, you get end-to-end type safety from your OpenAPI spec to your React components.

The Type Safety Challenge

Most teams struggle with maintaining consistency between backend APIs and frontend code. Common issues include:

• Manual type definitions that quickly become outdated
• Runtime errors from API changes not reflected in types
• No IntelliSense support for API responses
• Inconsistent error handling across endpoints

How Swagger to TanStack Ensures Type Safety

The CLI parses your OpenAPI specification and generates TypeScript interfaces for every schema, request, and response. Here's an example:

Runtime Validation

Type safety doesn't end at compile time. With Zod or Yup validation, you can ensure runtime type safety:

This generates Zod schemas alongside your TypeScript types, providing automatic runtime validation for all API responses.