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Overview

What is an Agent​

An Agent (intelligent entity) is an AI application capable of autonomously executing tasks, interacting with users, and invoking external tools. Unlike traditional conversational AI, Agents have the following core capabilities:

  • Autonomous Decision-Making: Plans and executes steps autonomously based on user input and context
  • Tool Invocation: Calls external APIs, databases, search engines, and other tools to complete tasks
  • Multi-turn Interaction: Supports complex multi-turn conversations and state management
  • Streaming Output: Returns thinking processes and execution results in real-time streams

Technology Selection​

CloudBase currently supports adapters for the following Agent frameworks:

Framework Options​

FrameworkLanguage SupportFeaturesUse Cases
LangChainTypeScript/PythonMature, stable, rich ecosystemGeneral-purpose Agent development
LangGraphTypeScript/PythonGraph-structured workflows, fine-grained controlComplex multi-step tasks
CrewAIPythonMulti-Agent collaborationTeam collaboration tasks

Deployment Options​

OptionFeaturesDevelopment LanguageUse Cases
HTTP Cloud FunctionsFast deployment, pay-as-you-go billing, auto-scalingJavaScript/TypeScript/PythonLightweight Agents, low-frequency invocations
CloudBase RunLong connections, custom runtimesContainer-based, supports any programming languageComplex Agents, high-concurrency scenarios

Development Workflow​

1. Choose a Development Framework​

Select the appropriate Agent framework based on your project requirements:

  • Need to quickly develop a general-purpose Agent → LangChain
  • Need complex workflow control → LangGraph
  • Need multi-Agent collaboration → CrewAI

2. Develop Agent Logic​

Use the Agent adapter provided by CloudBase to integrate the framework with the AG-UI protocol:

// LangChain Example
import { LangchainAgent } from "@cloudbase/agent-adapter-langchain";
import { createAgent as createLangchainAgent } from "langchain";

// Create LangChain Agent
const lcAgent = createLangchainAgent({ model, checkpointer });

// Wrap as AG-UI compatible Agent
const agent = new LangchainAgent({
  agent: lcAgent,
});

3. Deploy to CloudBase​

Choose the appropriate deployment option:

4. Client Integration​

Invoke the Agent from various clients:

AG-UI Protocol​

CloudBase Agents are fully compatible with the AG-UI Protocol, a standardized front-end and back-end communication protocol that supports:

  • SSE Streaming: Real-time transmission of Agent execution processes
  • Tool Invocation: Unified calling standards for front-end and server-side tools
  • Human-Machine Interaction: Supports user confirmation, input, and other interaction scenarios
  • State Synchronization: Real-time synchronization of Agent state with clients

Quick Start​

Prerequisites​

  1. CloudBase environment activated
  2. Node.js 18+ or Python 3.9+ installed
  3. Large model configured (see Access Large Models)
  4. API Key created (Get it here)

5-Minute Quick Experience​

# 1. Install dependencies
npm install @cloudbase/agent-adapter-langchain @cloudbase/agent-server langchain @langchain/openai @langchain/langgraph express

# 2. Set environment variables
export TCB_ENV_ID=your-env-id          # CloudBase environment ID
export TCB_API_KEY=your-api-key        # CloudBase API Key
export TCB_AI_MODEL=deepseek-v4-flash       # Model name

# 3. Create Agent
cat > index.js << 'EOF'
const { LangchainAgent } = require("@cloudbase/agent-adapter-langchain");
const { createExpressRoutes } = require("@cloudbase/agent-server");
const { createAgent: createLangchainAgent } = require("langchain");
const { ChatOpenAI } = require("@langchain/openai");
const { MemorySaver } = require("@langchain/langgraph");
const express = require("express");

const checkpointer = new MemorySaver();

function createAgent() {
  // Use CloudBase's built-in large model endpoint
  const model = new ChatOpenAI({
    model: process.env.TCB_AI_MODEL || "deepseek-v4-flash",
    apiKey: process.env.TCB_API_KEY,
    configuration: {
      baseURL: `https://${process.env.TCB_ENV_ID}.api.tcloudbasegateway.com/v1/ai/cloudbase`,
    },
  });
  const lcAgent = createLangchainAgent({ model, checkpointer });

  return {
    agent: new LangchainAgent({ agent: lcAgent }),
  };
}

const app = express();
createExpressRoutes({ createAgent, express: app });
app.listen(3000, () => console.log("Agent running on http://localhost:3000"));
EOF

# 4. Run locally
node index.js

Visit http://localhost:3000 to experience the Agent.

tip

CloudBase has built-in support for Tencent Hunyuan and DeepSeek large models — no external API key required. For details, see Access Large Models.

Next Steps​