codegen-openapiFrom OpenAPI spec to typed frontend code

Generate Next.js route handlers, typed services and React hooks from any OpenAPI 3 JSON spec — in one command.

Next.js App & Pages Router

One proxy handler per API path, with path params, query strings, JSON and multipart bodies, and JWT forwarding.

Types derived from your schemas — $ref, allOf / oneOf / anyOf, enums and nullable fields (OAS 3.0 and 3.1).

React Query (useQuery / useMutation) or zero-dependency useState / useEffect hooks for every operation.

`openapi-gen run` guides you in English or Portuguese — type ? for help at any step — shows a review, writes a short config and generates everything.