Clerk OAuth access tokens

import { clerk, useAuth } from "@toolgrain/clerk";
import { createServer, tool } from "@toolgrain/mcp";
import { http } from "@toolgrain/node";
import { z } from "zod";

const publishableKey = process.env.CLERK_PUBLISHABLE_KEY;
const secretKey = process.env.CLERK_SECRET_KEY;
if (!publishableKey || !secretKey) throw new Error("Clerk keys are required");

const whoAmI = tool({
  input: z.object({}),
  execute(_input, ctx) {
    const { userId, clientId, scopes } = useAuth(ctx);
    return { userId, clientId, scopes: [...scopes] };
  },
});
const server = createServer({
  name: "clerk-example", version: "1.0.0", tools: { whoAmI },
  auth: clerk({ publishableKey, secretKey }),
});
await server.listen(http({ port: 3000 }));