The Anthropic Model Context Protocol (MCP) is a standardized protocol designed to facilitate structured interactions between AI models and external tools or APIs. This extension integrates MCP with AgentKit, enabling AI agents to seamlessly perform onchain actions.

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Why Use MCP with AgentKit?

Integrating MCP with AgentKit provides several key benefits:
  • Standardized Protocol: MCP provides a structured, standardized way for AI models to interact with external tools, ensuring consistency and reliability.
  • Onchain Capabilities: Enables AI agents to perform blockchain operations such as token transfers, smart contract interactions, and more.
  • Flexible Integration: Easily integrates with existing agent workflows and infrastructure.

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Installation

Install the required packages using npm: 
npm install @coinbase/agentkit-model-context-protocol @coinbase/agentkit @modelcontextprotocol/sdk

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Prerequisites

Before you begin, ensure you have the following: Check your Node.js version: 
node --version
If needed, install the latest Node.js version: 
nvm install node

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Basic Usage

Here’s a basic example demonstrating how to set up an MCP server integrated with AgentKit: 
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { CallToolRequestSchema, ListToolsRequestSchema } from "@modelcontextprotocol/sdk/types.js";
import { getMcpTools } from "@coinbase/agentkit-model-context-protocol";
import { AgentKit } from "@coinbase/agentkit";

// Initialize AgentKit with your CDP API keys
const agentKit = await AgentKit.from({
  cdpApiKeyName: process.env.CDP_API_KEY_NAME,
  cdpApiKeyPrivateKey: process.env.CDP_API_KEY_PRIVATE_KEY,
});

// Retrieve MCP-compatible tools from AgentKit
const { tools, toolHandler } = await getMcpTools(agentKit);

// Create MCP server instance
const server = new Server(
  {
    name: "agentkit",
    version: "0.1.0",
  },
  {
    capabilities: {
      tools: {},
    },
  },
);

// Handle requests to list available tools
server.setRequestHandler(ListToolsRequestSchema, async () => {
  return {
    tools,
  };
});

// Handle requests to execute specific tools
server.setRequestHandler(CallToolRequestSchema, async (request) => {
  try {
    return toolHandler(request.params.name, request.params.arguments);
  } catch (error) {
    throw new Error(`Tool ${request.params.name} failed: ${error}`);
  }
});

// Set up standard input/output transport for the server
const transport = new StdioServerTransport();

// Connect the server to the transport
await server.connect(transport);

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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, verify the following:
  • Ensure your CDP API keys are correctly set in environment variables.
  • Confirm that the requested tool is supported by your AgentKit instance.
  • Check for sufficient funds or permissions for blockchain transactions.

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MCP Server Connection Issues

If the MCP server fails to connect:
  • Verify that the transport layer (stdio, HTTP, etc.) is correctly configured.
  • Check for port conflicts or permissions issues if using network-based transports.

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Debugging Tips

  • Enable verbose logging in your MCP server setup to gain insights into request handling and errors.
  • Use environment variables to toggle debug modes for detailed logs.