copilotkit__copilotkit/examples/coagents-starter/ui/app/api/copilotkit/route.ts

import { NextRequest } from "next/server";
import {
  CopilotRuntime,
  copilotRuntimeNextJSAppRouterEndpoint,
  ExperimentalEmptyAdapter,
  // uncomment this if you want to use LangGraph Platform
  // langGraphPlatformEndpoint,
} from "@copilotkit/runtime";

const serviceAdapter = new ExperimentalEmptyAdapter();

const runtime = new CopilotRuntime({
  remoteEndpoints: [
    // Uncomment this if you want to use LangGraph JS, make sure to
    // remove the remote action url below too.
    //
    // langGraphPlatformEndpoint({
    //   deploymentUrl: "http://localhost:8000",
    //   langsmithApiKey: process.env.LANGSMITH_API_KEY || "", // only used in LangGraph Platform deployments
    //   agents: [
    //     {
    //       name: "sample_agent",
    //       description: "A helpful LLM agent.",
    //     },
    //   ],
    // }),
    {
      url: process.env.REMOTE_ACTION_URL || "http://localhost:8000/copilotkit",
    },
  ],
});

export const POST = async (req: NextRequest) => {
  const { handleRequest } = copilotRuntimeNextJSAppRouterEndpoint({
    runtime,
    serviceAdapter,
    endpoint: "/api/copilotkit",
  });

  return handleRequest(req);
};