---
title: "OpenAPI Adapters"
description: "The HTTP adapters that run OpenAPI Handler and OpenAPI Link, and where to import each one."
---

OpenAPI runs over HTTP only. Pick the adapter for your server, then import [OpenAPI Handler](/docs/openapi/handler) from it. For WebSocket or message ports, use [RPC](/docs/rpc/adapters).

## Server Adapters

| Adapter                                 | Import `OpenAPIHandler` from |
| --------------------------------------- | ---------------------------- |
| [Fetch API](/docs/adapters/fetch-api)   | `@orpc/openapi/fetch`        |
| [Node HTTP](/docs/adapters/node-http)   | `@orpc/openapi/node`         |
| [Fastify](/docs/adapters/fastify)       | `@orpc/openapi/fastify`      |
| [AWS Lambda](/docs/adapters/aws-lambda) | `@orpc/openapi/aws-lambda`   |

## Client Adapter

[OpenAPI Link](/docs/openapi/link) uses the [Fetch API](/docs/adapters/fetch-api) adapter: import `OpenAPILink` from `@orpc/openapi/fetch`. It calls any server adapter above, or any other OpenAPI-compliant server.

## Frameworks and Platforms

Every framework and platform adapter built on the Fetch API or Node HTTP also serves OpenAPI, such as [Next.js](/docs/adapters/next), [Hono](/docs/adapters/hono), [Express.js](/docs/adapters/express), and [Cloudflare Workers](/docs/adapters/cloudflare-workers). Where an example uses `RPCHandler`, swap in `OpenAPIHandler` from the matching import above. See [Adapters](/docs/adapters) for the full list.