Build Once.
Run in any Chat App.

1import { createUniversalApp, defineTool } from '@pancakeapps/server';
2import { mcpAppsAdapter } from '@pancakeapps/adapter-mcp-apps';
3import { chatgptAdapter } from '@pancakeapps/adapter-chatgpt-apps';
4import { z } from 'zod';
5
6const app = createUniversalApp({
7  adapters: [mcpAppsAdapter(), chatgptAdapter()],
8});
9
10app.tool(
11  defineTool({
12    name: 'get_weather',
13    description: 'Get weather for a city',
14    input: z.object({ city: z.string() }),
15    widget: 'WeatherWidget', // renders your React component
16    handler: async ({ city }) => {
17      const data = await fetchWeather(city);
18      return { city, ...data };
19    },
20  }),
21);
22
23app.start();