You can read the documentation here.
Core
| Package | Purpose | Docs |
|---|---|---|
| @orpc/contract | Define API contract as the single source of truth. | Procedure Contract, Contract Router, Implementation, Generate from OpenAPI |
| @orpc/server | Build APIs or implement contracts. | Procedure, Router, Middleware, Context, RPC Handler |
| @orpc/client | Consume APIs with end-to-end type safety. | Client-Side Clients, Server-Side Clients, RPC Link, Error Handling |
| @orpc/openapi | Add OpenAPI compatibility to APIs. | OpenAPI Handler, OpenAPI Link, Specification, Scalar |
Schema validation
| Package | Purpose | Docs |
|---|---|---|
| @orpc/zod | Integrate with Zod. | Zod |
| @orpc/valibot | Integrate with Valibot. | Valibot |
| @orpc/arktype | Integrate with ArkType. | ArkType |
Built-in features
| Package | Purpose | Docs |
|---|---|---|
| @orpc/publisher | Pub/Sub with memory, Redis, and Upstash adapters. | Publisher |
| @orpc/ratelimit | Rate limiting with memory, Redis, and Upstash adapters. | Rate Limit |
| @orpc/hibernation | Leverage Hibernation APIs like Cloudflare's Hibernation WebSocket. | Hibernation |
| @orpc/json-schema | Smart coercion for OpenAPI requests. | Smart Coercion |
Framework & ecosystem integrations
| Package | Purpose | Docs |
|---|---|---|
| @orpc/next | Integrate with Next.js Server Functions. | Next.js |
| @orpc/ai-sdk | Turn contracts and procedures into AI SDK tools. | AI SDK |
| @orpc/tanstack-query | Integrate with TanStack Query. | TanStack Query |
| @orpc/pinia-colada | Integrate with Pinia Colada. | Pinia Colada |
| @orpc/swr | Integrate with SWR. | SWR |
| @orpc/experimental-msw | Mock procedures with Mock Service Worker. | MSW |
| @orpc/experimental-effect | Integrate with Effect. | Effect |
| @orpc/nest | Implement your contract with NestJS. | NestJS |
| @orpc/node | Node.js plugins for static file serving and large uploads. | Static File, Tmp File Upload, Batch Response Compression |
| @orpc/bun | Adapters for Bun's Redis. | Publisher, Rate Limit |
| @orpc/cloudflare | Adapters for Cloudflare's RateLimit and Durable Objects. | Publisher, Rate Limit |
| @orpc/trpc | Reuse existing tRPC routers within oRPC. | tRPC |
Observability
| Package | Purpose | Docs |
|---|---|---|
| @orpc/opentelemetry | Integrate with OpenTelemetry for distributed tracing. | OpenTelemetry |
| @orpc/pino | Integrate with Pino for logging. | Pino |
| @orpc/evlog | Integrate with Evlog for logging. | Evlog |
Like what we build over at middleapi? You can help keep it going through GitHub Sponsors or Open Collective. Every bit helps! π
 ScreenshotOne.comThe screenshot API for developers |
 YuzuWe're hiring NYC based engineers |
 MisskeyHQDecentralized microblogging SNS born on Earth |
 LN Markets |
With thanks to 36 past sponsors who helped get oRPC here.
oRPC is inspired by existing solutions that prioritize type safety and developer experience. Special acknowledgments to:
- tRPC: For pioneering the concept of end-to-end type-safe RPC and influencing the development of type-safe APIs.
- ts-rest: For its emphasis on contract-first development and OpenAPI integration, which have greatly inspired oRPC's feature set.
Distributed under the MIT License. See LICENSE for more information.