Next.js

Next.js Route Handlers receive a Web Request, so the framework-agnostic @postel/http handler works directly — no adapter needed:

import { fetchWebhook } from "@postel/http";
import { postel } from "@/lib/postel";

const handler = fetchWebhook(postel.inbound.vendor, {
  onVerified: async ({ event }) => {
    await handleOrder(event);
  },
});

export const POST = (req: Request) => handler(req);

The @postel/nextjs package name is reserved — a stub exporting only a marker today. A future release adds Route-Handler type ergonomics on top of @postel/http; until then, the snippet above is the supported path.