Adapters

Pick the oRPC adapter for your runtime, framework, or messaging channel, from the Fetch API and Node HTTP to Next.js, Hono, WebSocket, and Electron.

An adapter connects a handler to where your code runs. The router stays the same, so switching hosts only changes the few lines that mount the handler. HTTP adapters serve both RPC and OpenAPI; WebSocket and Message Port adapters serve RPC only.

Core

• Fetch API: Bun, Deno, and anything built on Request and Response.
• Node HTTP: Node’s http, https, and http2 servers.
• Fastify: Fastify servers.
• AWS Lambda: API Gateway and Function URLs, with response streaming.
• WebSocket: ws, crossws, Bun, Deno, Cloudflare, and uWebSockets.
• Message Port: iframes, workers, and other contexts linked by a MessagePort.

Frameworks

Built on the Fetch API: Next.js, Nuxt, SvelteKit, TanStack Start, SolidStart, React Router, Astro, Hono, Elysia, and H3. Built on Node HTTP: Express.js.

Platforms

• Cloudflare Workers: the Fetch API Adapter plus the compatibility flags it needs.
• Expo: call oRPC from a React Native app.

Between Contexts

Built on the Message Port Adapter: Browser (extensions and windows), Electron, Web Workers, and Worker Threads.