tRPC + OpenAPI Integration

Overview

Generate REST endpoints and OpenAPI documentation from your tRPC routers. Get the best of both worlds: type-safe internal API with tRPC, REST/Swagger for external consumers.

Package: trpc-to-openapi (active fork of archived trpc-openapi)
Requirements: tRPC v11+, Zod

Key Benefit: Single source of truth — define once in tRPC, expose as both RPC and REST.

When to Use This Skill

✅ Use tRPC + OpenAPI when:

• Internal apps use tRPC, but need REST for third parties
• Need Swagger/OpenAPI documentation
• Mobile apps (non-React Native) need REST endpoints
• Microservices with mixed languages need interop
• Public API requires REST standard