oRPC is a powerful combination of RPC and OpenAPI, makes it easy to build APIs that are end-to-end type-safe and adhere to OpenAPI standards
You can find the full documentation here.
This is a quick overview of how to use oRPC. For more details, please refer to the documentation.
Define your router:
import type { IncomingHttpHeaders } from 'node:http' import { ORPCError, os } from '@orpc/server' import * as z from 'zod' const PlanetSchema = z.object({ id: z.number().int().min(1), name: z.string(), description: z.string().optional(), }) export const listPlanet = os .input( z.object({ limit: z.number().int().min(1).max(100).optional(), cursor: z.number().int().min(0).default(0), }), ) .handler(async ({ input }) => { // your list code here return [{ id: 1, name: 'name' }] }) export const findPlanet = os .input(PlanetSchema.pick({ id: true })) .handler(async ({ input }) => { // your find code here return { id: 1, name: 'name' } }) export const createPlanet = os .$context<{ headers: IncomingHttpHeaders }>() .use(({ context, next }) => { const user = parseJWT(context.headers.authorization?.split(' ')[1]) if (user) { return next({ context: { user } }) } throw new ORPCError('UNAUTHORIZED') }) .input(PlanetSchema.omit({ id: true })) .handler(async ({ input, context }) => { // your create code here return { id: 1, name: 'name' } }) export const router = { planet: { list: listPlanet, find: findPlanet, create: createPlanet } }
Create your server:
import { createServer } from 'node:http' import { RPCHandler } from '@orpc/server/node' import { CORSPlugin } from '@orpc/server/plugins' const handler = new RPCHandler(router, { plugins: [new CORSPlugin()] }) const server = createServer(async (req, res) => { const result = await handler.handle(req, res, { context: { headers: req.headers } }) if (!result.matched) { res.statusCode = 404 res.end('No procedure matched') } }) server.listen( 3000, '127.0.0.1', () => console.log('Listening on 127.0.0.1:3000') )
Create your client:
import type { RouterClient } from '@orpc/server' import { createORPCClient } from '@orpc/client' import { RPCLink } from '@orpc/client/fetch' const link = new RPCLink({ url: 'http://127.0.0.1:3000', headers: { Authorization: 'Bearer token' }, }) export const orpc: RouterClient<typeof router> = createORPCClient(link)
Consume your API:
import { orpc } from './client' const planets = await orpc.planet.list({ limit: 10 })
Generate OpenAPI Spec:
import { OpenAPIGenerator } from '@orpc/openapi' import { ZodToJsonSchemaConverter } from '@orpc/zod/zod4' const generator = new OpenAPIGenerator({ schemaConverters: [new ZodToJsonSchemaConverter()] }) const spec = await generator.generate(router, { info: { title: 'Planet API', version: '1.0.0' } }) console.log(spec)
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.
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