---
title: "API Reference"
description: "Full signatures for every function, class, and type the oRPC packages export."
sidebar:
  icon: book-marked
---

Each package name links to its reference on [npmx](https://npmx.dev): every export with its signature and description, generated from the TypeScript declarations the package publishes. The guides beside it show those APIs in use.

:::tip
For questions the reference does not answer, [oRPC on DeepWiki](https://deepwiki.com/middleapi/orpc) maps out how the codebase fits together and lets you ask an AI assistant about any part of it.
:::

## Core

| Package | Purpose | Related Guides |
| ------- | ------- | -------------- |
| [@orpc/contract](https://npmx.dev/package-docs/@orpc/contract) | Define API contract as the single source of truth. | [Procedure Contract](/docs/contract/procedure), [Contract Router](/docs/contract/router), [Implementation](/docs/contract/implementation), [Generate from OpenAPI](/docs/contract/generate-from-openapi) |
| [@orpc/server](https://npmx.dev/package-docs/@orpc/server) | Build APIs or implement contracts. | [Procedure](/docs/procedure), [Router](/docs/router), [Middleware](/docs/middleware), [Context](/docs/context), [RPC Handler](/docs/rpc/handler) |
| [@orpc/client](https://npmx.dev/package-docs/@orpc/client) | Consume APIs with end-to-end type safety. | [Client-Side Clients](/docs/client/client-side), [Server-Side Clients](/docs/client/server-side), [RPC Link](/docs/rpc/link), [Error Handling](/docs/client/error-handling) |
| [@orpc/openapi](https://npmx.dev/package-docs/@orpc/openapi) | Add OpenAPI compatibility to APIs. | [OpenAPI Handler](/docs/openapi/handler), [OpenAPI Link](/docs/openapi/link), [Specification](/docs/openapi/specification), [Scalar](/docs/openapi/scalar) |

## Schema Validation

| Package | Purpose | Related Guides |
| ------- | ------- | -------------- |
| [@orpc/zod](https://npmx.dev/package-docs/@orpc/zod) | Integrate with Zod. | [Zod](/docs/integrations/zod) |
| [@orpc/valibot](https://npmx.dev/package-docs/@orpc/valibot) | Integrate with Valibot. | [Valibot](/docs/integrations/valibot) |
| [@orpc/arktype](https://npmx.dev/package-docs/@orpc/arktype) | Integrate with ArkType. | [ArkType](/docs/integrations/arktype) |

## Built-in Features

| Package | Purpose | Related Guides |
| ------- | ------- | -------------- |
| [@orpc/publisher](https://npmx.dev/package-docs/@orpc/publisher) | Pub/Sub with memory, Redis, and Upstash adapters. | [Publisher](/docs/helpers/publisher) |
| [@orpc/ratelimit](https://npmx.dev/package-docs/@orpc/ratelimit) | Rate limiting with memory, Redis, and Upstash adapters. | [Rate Limit](/docs/helpers/ratelimit) |
| [@orpc/hibernation](https://npmx.dev/package-docs/@orpc/hibernation) | Leverage Hibernation APIs like Cloudflare's WebSocket Hibernation. | [Hibernation](/docs/integrations/hibernation) |
| [@orpc/json-schema](https://npmx.dev/package-docs/@orpc/json-schema) | Smart coercion for OpenAPI requests. | [Smart Coercion](/docs/plugins/smart-coercion) |

## Framework and Ecosystem Integrations

| Package | Purpose | Related Guides |
| ------- | ------- | -------------- |
| [@orpc/next](https://npmx.dev/package-docs/@orpc/next) | Integrate with Next.js Server Functions. | [Next.js](/docs/integrations/next) |
| [@orpc/ai-sdk](https://npmx.dev/package-docs/@orpc/ai-sdk) | Turn contracts and procedures into AI SDK tools. | [AI SDK](/docs/integrations/ai-sdk) |
| [@orpc/tanstack-query](https://npmx.dev/package-docs/@orpc/tanstack-query) | Integrate with TanStack Query. | [TanStack Query](/docs/integrations/tanstack-query) |
| [@orpc/pinia-colada](https://npmx.dev/package-docs/@orpc/pinia-colada) | Integrate with Pinia Colada. | [Pinia Colada](/docs/integrations/pinia-colada) |
| [@orpc/swr](https://npmx.dev/package-docs/@orpc/swr) | Integrate with SWR. | [SWR](/docs/integrations/swr) |
| [@orpc/experimental-effect](https://npmx.dev/package-docs/@orpc/experimental-effect) | Integrate with Effect. | [Effect](/docs/integrations/effect) |
| [@orpc/nest](https://npmx.dev/package-docs/@orpc/nest) | Implement your contract with NestJS. | [NestJS](/docs/integrations/nest) |
| [@orpc/node](https://npmx.dev/package-docs/@orpc/node) | Node.js plugins for static file serving and large uploads. | [Static File](/docs/plugins/static-file), [Tmp File Upload](/docs/plugins/tmp-file-upload), [Batch Response Compression](/docs/plugins/batch-response-compression) |
| [@orpc/bun](https://npmx.dev/package-docs/@orpc/bun) | Bun Redis adapters for Publisher and Rate Limit. | [Publisher](/docs/helpers/publisher), [Rate Limit](/docs/helpers/ratelimit) |
| [@orpc/cloudflare](https://npmx.dev/package-docs/@orpc/cloudflare) | Cloudflare Durable Object and Rate Limit adapters. | [Publisher](/docs/helpers/publisher), [Rate Limit](/docs/helpers/ratelimit) |
| [@orpc/trpc](https://npmx.dev/package-docs/@orpc/trpc) | Reuse existing tRPC routers within oRPC. | [tRPC](/docs/integrations/trpc) |

## Observability

| Package | Purpose | Related Guides |
| ------- | ------- | -------------- |
| [@orpc/opentelemetry](https://npmx.dev/package-docs/@orpc/opentelemetry) | Distributed tracing with OpenTelemetry. | [OpenTelemetry](/docs/integrations/opentelemetry) |
| [@orpc/pino](https://npmx.dev/package-docs/@orpc/pino) | Logging with Pino. | [Pino](/docs/integrations/pino) |
| [@orpc/evlog](https://npmx.dev/package-docs/@orpc/evlog) | Logging with Evlog. | [Evlog](/docs/integrations/evlog) |