在你的 Express 项目中集成 Mastra
🌐 Integrate Mastra in your Express project
在本指南中,你将使用 Mastra 和 Express 构建一个调用工具的 AI 代理。通过使用 Express 服务器适配器,你可以将代理暴露为 HTTP 端点,而无需自己编写路由或运行单独的 Mastra 服务器。
🌐 In this guide, you'll build a tool-calling AI agent using Mastra and Express. Using the Express server adapter, you can expose your agents as HTTP endpoints without writing the routing yourself or running a separate Mastra server.
在你开始之前Direct link to 在你开始之前
🌐 Before you begin
创建一个新的 Express 应用(可选)Direct link to 创建一个新的 Express 应用(可选)
🌐 Create a new Express app (optional)
如果你已经有一个 Express 应用,可以跳到下一步。
🌐 If you already have an Express app, skip to the next step.
克隆此 模板仓库 并安装依赖:
🌐 Clone this boilerplate repository and install dependencies:
- HTTPS
- SSH
- npm
- pnpm
- Yarn
- Bun
git clone https://github.com/mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
npm install
git clone https://github.com/mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
pnpm install
git clone https://github.com/mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
yarn install
git clone https://github.com/mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
bun install
- npm
- pnpm
- Yarn
- Bun
git clone git@github.com:mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
npm install
git clone git@github.com:mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
pnpm install
git clone git@github.com:mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
yarn install
git clone git@github.com:mastra-ai/express-ts-boilerplate.git
cd express-ts-boilerplate
bun install
初始化 MastraDirect link to 初始化 Mastra
🌐 Initialize Mastra
在你的 Express 项目目录中,运行 mastra init。
🌐 Inside your Express project directory, run mastra init.
在提示时,选择一个提供商(例如 OpenAI)并输入你的密钥:
🌐 When prompted, choose a provider (e.g. OpenAI) and enter your key:
npx mastra@latest init
这将创建一个包含示例天气代理和以下文件的 src/mastra 文件夹:
🌐 This creates a src/mastra folder with an example weather agent and the following files:
index.ts- Mastra 配置,包括内存tools/weather-tool.ts- 一个用于获取给定位置天气的工具agents/weather-agent.ts——一个使用该工具的天气代理和提示
你稍后会将 src/mastra/index.ts 文件传递给 Express 服务器适配器。
🌐 You'll pass the src/mastra/index.ts file to the Express server adapter later.
添加服务器适配器Direct link to 添加服务器适配器
🌐 Add server adapter
安装 Express 服务器适配器包:
🌐 Install the Express server adapter package:
- npm
- pnpm
- Yarn
- Bun
npm install @mastra/express@latest
pnpm add @mastra/express@latest
yarn add @mastra/express@latest
bun add @mastra/express@latest
打开位于 src/index.ts 的 Express 入口文件,并添加所需的导入和初始化代码:
🌐 Open the Express entry file at src/index.ts and add the required import and initialization code:
import express, { type Request, type Response } from "express";
import { MastraServer } from "@mastra/express";
import { mastra } from "./mastra";
const app = express();
const PORT = process.env.PORT || 3000;
// Middleware
app.use(express.json());
const server = new MastraServer({ app, mastra });
await server.init();
// Routes
app.get("/", (_req: Request, res: Response) => {
res.json({ message: "Hello, World!" });
});
// Start server
app.listen(PORT, () => {
console.log(`Server is running on http://localhost:${PORT}`);
});
MastraServer 使用现有的 Express app 和根 mastra 实例进行初始化。调用 init() 会注册 Mastra 中间件并公开所有可用的 Mastra 端点。
🌐 The MastraServer is initialized with the existing Express app and the root mastra instance. Calling init() registers the Mastra middleware and exposes all available Mastra endpoints.
测试你的代理Direct link to 测试你的代理
🌐 Test your agent
默认情况下,Mastra 的端点会添加在 /api 子路径下,并使用你的代理/工作流 ID。由 mastra init 创建的默认 weather-agent 可在 /api/agents/weather-agent 访问。
🌐 By default, Mastra's endpoints are added under the /api subpath and use your agent/workflow IDs. The default weather-agent created by mastra init is available at /api/agents/weather-agent.
启动你的 Express 服务器:
🌐 Start your Express server:
npm run start
在另一个终端窗口中,使用 curl 向天气代理询问:
🌐 In a separate terminal window, use curl to ask the weather agent:
curl -X POST http://localhost:3000/api/agents/weather-agent/generate -H "Content-Type: application/json" -d "{\"messages\":[{\"role\":\"user\",\"content\":\"What is the weather like in Seoul?\"}]}"
下一步Direct link to 下一步
🌐 Next steps
祝贺你使用 Express 成功创建了你的 Mastra 代理!🎉
🌐 Congratulations on building your Mastra agent with Express! 🎉
从这里,你可以使用你自己的工具和逻辑来扩展项目:
🌐 From here, you can extend the project with your own tools and logic:
当你准备好时,阅读更多关于 Mastra 如何与 Express 集成的内容:
🌐 When you're ready, read more about how Mastra integrates with Express: