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Introduction to Vercel AI SDK

Vercel AI SDK is a library for building AI-powered applications with React and JavaScript/TypeScript. It provides a set of tools and utilities that make it easy to build applications that use AI models, including:
  • Streaming responses from AI models
  • Managing AI model state
  • Building chat interfaces
  • Handling tool usage by AI models
This extension allows you to easily integrate AgentKit’s onchain capabilities with Vercel AI SDK, enabling you to build web applications with AI agents that can interact with blockchain networks and a crypto wallet.

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Why Use Vercel AI SDK with AgentKit

Vercel AI SDK is particularly well-suited for building web applications with AI capabilities. When combined with AgentKit, it enables you to:
  • Build web-based AI agents: Create web applications with AI agents that can interact onchain
  • Stream AI responses: Provide a better user experience with streaming responses from AI models
  • Leverage React components: Use Vercel AI SDK’s React components to build chat interfaces
  • Deploy on Vercel: Easily deploy your application on Vercel’s platform

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Installation

For a single command to install all necessary dependencies, run: 
npm install @coinbase/agentkit-vercel-ai-sdk @coinbase/agentkit ai @ai-sdk/openai
To break it down, this package is: 
npm install @coinbase/agentkit-vercel-ai-sdk
This package is used alongside AgentKit and AI SDK, so these will need to be installed as well. 
npm install @coinbase/agentkit ai
Finally, install the model provider you want to use. For example, to use OpenAI, install the @ai-sdk/openai package. See here for a list of supported model providers. 
npm install @ai-sdk/openai

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Basic Usage

The main export of this package is the getVercelAITools function. This function takes an AgentKit instance and returns an object containing the tools for the AgentKit agent. This object can then be passed to AI SDK. Here’s a snippet of code that shows how to use the getVercelAITools function to get the tools for the AgentKit agent.
chatbot.ts
import { getVercelAITools } from "@coinbase/agentkit-vercel-ai-sdk";
import { AgentKit } from "@coinbase/agentkit";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";

// Get your Coinbase Developer Platform API key from the Portal: https://portal.cdp.coinbase.com/
// Or, check out one of the other supported wallet providers: https://github.com/coinbase/agentkit/tree/main/typescript/agentkit
const agentKit = await AgentKit.from({
  cdpApiKeyName: process.env.CDP_API_KEY_NAME,
  cdpApiKeyPrivateKey: process.env.CDP_API_KEY_PRIVATE_KEY,
});

const tools = await getVercelAITools(agentKit);

// There are multiple methods to generate text with AI SDK.
// See here for more information: https://sdk.vercel.ai/docs/ai-sdk-core/generating-text
const { text } = await generateText({
  model: openai("gpt-4o-mini"), // Make sure to have OPENAI_API_KEY set in your environment variables
  system: "You are an onchain AI assistant with access to a wallet.",
  prompt: "Print wallet details",
  tools,
  // Allow multi-step tool usage
  // See: https://sdk.vercel.ai/docs/foundations/agents#multi-step-tool-usage
  maxSteps: 10,
});

console.log(text);
For a full example, see the AgentKit AI SDK Chatbot Example.

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Using Different Model Providers

Vercel AI SDK supports multiple model providers. Here’s how to use different providers: 
import { openai } from "@ai-sdk/openai";

const { text } = await generateText({
  model: openai("gpt-4o"),
  system: "You are an onchain AI assistant with access to a wallet.",
  prompt: "Print wallet details",
  tools,
  maxSteps: 10,
});

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Troubleshooting

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Common Issues

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Tool Execution Errors

If you encounter errors during tool execution, check the following:
  • Ensure your CDP API keys are correctly set in environment variables
  • Verify that the network you’re using is supported by the action provider
  • Check that you have sufficient funds for any transactions

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Model Provider Issues

If you’re having issues with the model provider:
  • Ensure you have the correct API key set for your model provider
  • Check that you’re using a model that supports tool usage
  • Verify that you’ve installed the correct model provider package

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Debugging Tips

  • Set debug: true in the options for getVercelAITools to see more detailed logs
  • Use the maxSteps parameter to limit the number of tool calls the model can make
  • Check the network tab in your browser’s developer tools to see the requests being made