> ## Documentation Index > Fetch the complete documentation index at: https://docs.circuit.org/llms.txt > Use this file to discover all available pages before exploring further. # Reference client > A TypeScript client for the partner API with no dependencies, and a small server example that uses it. Download [`circuit.ts`](https://circuit.org/partners/circuit.ts) into your app. It runs in browsers, Node 22+ and Bun, and uses only `fetch` and WebCrypto (X25519, AES-GCM and SHA-256). [Pinewood](https://circuit.org/partners/demo), Circuit's demo partner app, uses the same file; you can link your account there to try the full integration. ```typescript theme={"theme":{"light":"nord","dark":"nord"}} import { circuit, link } from "./circuit"; const { url, permit } = await link(""); // Open `url` in a real browser for the user to approve, then store the permit like an access token. const user = circuit(await permit); const trend = (await user.agents()).find((agent) => agent.name === "Macro Trend")!; const session = await user.start({ agent: trend.id, wallet: null, amount: "1000" }); // runs now ``` ### A server-side demo Pinewood keeps the permit in the browser. `server.ts` below keeps it on the server instead and serves a page for one user, with a link button, balances, a chat with Approve and Decline on Ask's proposals, and Stop on running agents. Run it with `bun server.ts ` and open `http://localhost:4455`. ```typescript server.ts theme={"theme":{"light":"nord","dark":"nord"}} import { circuit, link } from "./circuit"; const app = process.argv[2]; const api = "https://api.circuit.org"; let permit: string | undefined; let chat: string | null = null; const json = (body: unknown, status = 200) => Response.json(body, { status }); const page = `Partner demo 




`;

Bun.serve({
  port: 4455,
  async fetch(request) {
    const path = new URL(request.url).pathname;
    if (path === "/") return new Response(page, { headers: { "content-type": "text/html" } });
    if (path === "/connect") {
      const started = await link(app, api);
      started.permit.then((approved) => (permit = approved));
      return json({ url: started.url });
    }
    if (!permit) return json({ error: "Connect first" }, 401);
    const user = circuit(permit, api);
    const body = request.method === "POST" ? await request.json() : {};
    try {
      if (path === "/account") return json(await user.account());
      if (path === "/ask") {
        const sent = await user.send(chat, body.text);
        chat = sent.chat;
        return json(await user.reply(sent));
      }
      if (path === "/decide") {
        return json(await user.decide(body.id, body.decision));
      }
      if (path === "/stop") return json(await user.stop(body.id));
    } catch (error) {
      return json({ error: error instanceof Error ? error.message : String(error) }, 502);
    }
    return json({ error: "Not found" }, 404);
  },
});
console.log("Partner demo on http://localhost:4455");
```


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.