PACKAGE · API

@trpc/server

The tRPC server library

WEEKLY DOWNLOADS 1.9M
STARS 40.3K
FORKS 1.6K
OPEN ISSUES 232
GZIP SIZE 6.0 kB
UNPACKED SIZE 2.1 MB
DEPENDENCIES 1
LAST UPDATED 3mo ago
DOWNLOAD TRENDS

@trpc/server downloads — last 12 months

Download trends for @trpc/server1 download series from Jun 2025 to May 2026. Use left and right arrow keys to inspect monthly values.03.7M7.4M11.1M14.8MJun 2025SepDecMarMay 2026
@trpc/server
ABOUT @TRPC/SERVER

The @trpc/server package provides the core backend logic for tRPC, a TypeScript-first, end-to-end type-safe API framework. It empowers developers to build fully type-safe APIs by eliminating the need for manual API contract definitions, resolving common JavaScript/TypeScript API development pain points like runtime errors due to type mismatches and the overhead of managing separate frontend and backend schemas. tRPC achieves this by leveraging TypeScript's type system to ensure that your API endpoints, requests, and responses are perfectly aligned between client and server.

The fundamental philosophy behind tRPC is to provide a developer experience that feels like calling a local function while maintaining the robustness of a client-server architecture. It is primarily designed for developers who are already invested in the TypeScript ecosystem and are looking to build modern web applications, especially those using frameworks like Next.js or React. The goal is to reduce boilerplate, improve developer productivity, and enhance API reliability.

Key to @trpc/server's design is its procedure-based router. You define procedures (queries, mutations, subscriptions) as functions that are automatically exposed over HTTP, RPC, or WebSockets. The `createTRPCRouter` function allows you to group these procedures into a logical structure, and `buildHTTPHandler` or similar handlers enable easy integration with various server environments. This pattern enables features like middleware for authentication and logging, input validation via Zod or Superstruct, and automatic API documentation generation from your code.

@trpc/server integrates seamlessly with popular JavaScript and Node.js backend frameworks, including Express, Fastify, and Next.js with its `create-next-app` integration. It also plays well with ORMs like Prisma, offering type-safe database access patterns. The client-side libraries (`@trpc/react-query`, `@trpc/next`) automatically generate hooks based on your server-side router definition, allowing for a fluid development flow within React applications.

With an unpacked size of 2.1 MB and a highly optimized gzip bundle size of only 6.0 kB for the server component, @trpc/server is remarkably efficient. This small footprint ensures minimal impact on server-side performance and deployment size. The library has been actively developed and is a mature solution used in many production applications, evidenced by its considerable weekly download count and GitHub stars, indicating a strong community and ongoing maintenance.

WHEN TO USE
  • When building TypeScript-first APIs that require end-to-end type safety without generating separate API definition files.
  • When integrating with Next.js, particularly when leveraging its App Router capabilities for full-stack applications.
  • When you want to define API procedures (queries, mutations) that feel like calling local functions from your frontend clients.
  • When implementing input validation and output serialization using libraries like Zod or Superstruct for API procedures.
  • When creating APIs that need features like request batching or middleware for common cross-cutting concerns like authentication and logging.
  • When aiming for minimal bundle size for your API server while maintaining feature richness.
WHEN NOT TO USE
  • If your primary need is a simple RESTful API for an existing, non-TypeScript project lacking type safety investments.
  • If you only require basic HTTP request-response handling and do not necessitate the strict type contracts tRPC enforces.
  • If you are building a public API that must strictly adhere to OpenAPI/Swagger specifications without additional tooling for translation.
  • If your backend infrastructure is incompatible with Node.js environments or common JavaScript backend frameworks that @trpc/server supports.
  • If you prefer using traditional REST patterns and are not looking for a function-like client-server communication abstraction.

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COMPARISONS 5
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