Typesafe APIs Made Simple πͺ
See the code
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 | JSON Schema converter for Zod. | Zod |
| @orpc/valibot | JSON Schema converter for Valibot. | Valibot |
| @orpc/arktype | JSON Schema converter for 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/experimental-lock | Locking with memory, Redis, and Upstash adapters. | Lock |
| @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, Lock |
| @orpc/cloudflare | Adapters for Cloudflare Workers. | Publisher, Rate Limit, Lock, Traces |
| @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 |
With thanks to 38 past sponsors who helped get oRPC here.
oRPC is inspired by existing solutions that prioritize type safety and developer experience. Special acknowledgments to:
Distributed under the MIT License. See LICENSE for more information.
(top 24 of 126)
1,681 followers Β· starred Jun 2025
13,582 followers Β· starred Jun 2025
496 followers Β· starred May 2025
771 followers Β· starred Sep 2026
Typesafe APIs Made Simple πͺ
See the code
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 | JSON Schema converter for Zod. | Zod |
| @orpc/valibot | JSON Schema converter for Valibot. | Valibot |
| @orpc/arktype | JSON Schema converter for 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/experimental-lock | Locking with memory, Redis, and Upstash adapters. | Lock |
| @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, Lock |
| @orpc/cloudflare | Adapters for Cloudflare Workers. | Publisher, Rate Limit, Lock, Traces |
| @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.com The screenshot API for developers |
| Yuzu We're hiring NYC based engineers |
| MisskeyHQ Decentralized microblogging SNS born on Earth |
With thanks to 38 past sponsors who helped get oRPC here.
oRPC is inspired by existing solutions that prioritize type safety and developer experience. Special acknowledgments to:
Distributed under the MIT License. See LICENSE for more information.
(top 24 of 126)
1,681 followers Β· starred Jun 2025
13,582 followers Β· starred Jun 2025
496 followers Β· starred May 2025
771 followers Β· starred Sep 2026
