How to integrate Coinbase MCP with Claude Agent SDK

This guide walks you through connecting Coinbase to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Coinbase agent that can show all your coinbase wallet balances, list every crypto wallet i own, display recent wallets added to your account through natural language commands. This guide will help you understand how to give your Claude Agent SDK agent real control over a Coinbase account through Composio's Coinbase MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Coinbase is a platform for buying, selling, and storing cryptocurrency. It makes exchanging and managing crypto simple and secure for everyone.

28 Tools

Introduction

This guide walks you through connecting Coinbase to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Coinbase agent that can show all your coinbase wallet balances, list every crypto wallet i own, display recent wallets added to your account through natural language commands.

This guide will help you understand how to give your Claude Agent SDK agent real control over a Coinbase account through Composio's Coinbase MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

Also integrate Coinbase with

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TL;DR

Here's what you'll learn:
  • Get and set up your Claude/Anthropic and Composio API keys
  • Install the necessary dependencies
  • Initialize Composio and create a Tool Router session for Coinbase
  • Configure an AI agent that can use Coinbase as a tool
  • Run a live chat session where you can ask the agent to perform Coinbase operations

What is Claude Agent SDK?

The Claude Agent SDK is Anthropic's official framework for building AI agents powered by Claude. It provides a streamlined interface for creating agents with MCP tool support and conversation management.

Key features include:

  • Native MCP Support: Built-in support for Model Context Protocol servers
  • Permission Modes: Control tool execution permissions
  • Streaming Responses: Real-time response streaming for interactive applications
  • Context Manager: Clean async context management for sessions

What is the Coinbase MCP server, and what's possible with it?

The Coinbase MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Coinbase account. It provides structured and secure access to your cryptocurrency wallets, so your agent can retrieve wallet balances, monitor your digital assets, and help you stay informed about your crypto holdings in real time.

  • Comprehensive wallet listing: Instantly fetch a full list of all your Coinbase wallets, including details for each asset you hold.
  • Balance monitoring: Let your agent check and report the current balances for every cryptocurrency wallet connected to your account.
  • Portfolio overview: Get an at-a-glance summary of your crypto assets, helping you understand your overall digital asset distribution.
  • Streamlined asset visibility: Use your agent to quickly surface wallet addresses, asset types, and wallet-specific metadata for easier tracking and management.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Composio API Key and Claude/Anthropic API Key
  • Primary know-how of Claude Agents SDK
  • A Coinbase account
  • Some knowledge of Python
2

Getting API Keys for Claude/Anthropic and Composio

Claude/Anthropic API Key
  • Go to the Anthropic Console and create an API key. You'll need credits to use the models.
  • Keep the API key safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.
3

Install dependencies

npm install @anthropic-ai/claude-agent-sdk @composio/core dotenv

Install the Composio SDK and the Claude Agents SDK.

What's happening:

  • @composio/core provides Composio integration for Anthropic
  • @anthropic-ai/claude-agent-sdk is the core agent framework
  • dotenv/config loads environment variables
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
ANTHROPIC_API_KEY=your_anthropic_api_key_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates with Composio
  • USER_ID identifies the user for session management
  • ANTHROPIC_API_KEY authenticates with Anthropic/Claude
5

Import dependencies

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

dotenv.config();
What's happening:
  • We're importing all necessary libraries including the Claude Agent SDK and Composio
  • The dotenv.config() function loads environment variables from your .env file
  • This setup prepares the foundation for connecting Claude with Coinbase functionality
6

Create a Composio instance and Tool Router session

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });

  // Create Tool Router session for Coinbase
  const session = await composio.create(USER_ID, {
    toolkits: ['coinbase'],
  });
  const mcpUrl = session?.mcp.url;
What's happening:
  • The function checks for the required COMPOSIO_API_KEY environment variable
  • We're creating a Composio instance using our API key
  • The create method creates a Tool Router session for Coinbase
  • The returned url is the MCP server URL that your agent will use
7

Configure Claude Agent with MCP

const options: Options = {
  permissionMode: 'bypassPermissions',
  mcpServers: {
    composio: {
      type: 'http',
      url: mcpUrl,
      headers: { 'x-api-key': COMPOSIO_API_KEY }
    }
  },
  systemPrompt: 'You are a helpful assistant with access to Coinbase tools via Composio.',
  maxTurns: 10,
};
What's happening:
  • We're configuring the Claude Agent options with the MCP server URL
  • permissionMode: 'bypassPermissions' allows the agent to execute operations without asking for permission each time
  • The system prompt instructs the agent that it has access to Coinbase
  • maxTurns: 10 limits the conversation length to prevent excessive API usage
8

Create client and start chat loop

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}
What's happening:
  • The readline interface is created to handle user input and output
  • The query function is used to send the user's input to the agent
  • The chat loop continues until the user types 'exit' or 'quit'
9

Run the application

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}
What's happening:
  • The chat function is the entry point for the application
  • The try-catch block is used to handle any errors that occur

Complete Code

Here's the complete code to get you started with Coinbase and Claude Agent SDK:

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });
  const session = await composio.create(USER_ID, {
    toolkits: ['coinbase']
  });
  const mcp_url = session?.mcp.url;

  const options: Options = {
    permissionMode: 'bypassPermissions',
    mcpServers: {
      composio: {
        type: 'http',
        url: mcp_url,
        headers: { 'x-api-key': COMPOSIO_API_KEY }
      }
    },
    systemPrompt: 'You are a helpful assistant with access to Coinbase tools via Composio.',
    maxTurns: 10,
  };

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}

Conclusion

You've successfully built a Claude Agent SDK agent that can interact with Coinbase through Composio's Tool Router.

Key features:

  • Native MCP support through Claude's agent framework
  • Streaming responses for real-time interaction
  • Permission bypass for smooth automated workflows
You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.
TOOLS

Supported Tools

Every Coinbase action and event your agent gets out of the box.

Get Asset Details

Retrieve detailed information about a specific asset from Coinbase International Exchange.

Get Exchange Currency

Tool to retrieve detailed information about a specific currency from Coinbase Exchange API.

Get Instrument Details

Tool to get complete details for a specific trading instrument on Coinbase International Exchange.

Get Historical Funding Rate

Get historical funding rates for a specific instrument from Coinbase International Exchange.

Get Quote Per Instrument

Tool to get the current quote for a specific trading instrument on Coinbase International Exchange.

Get Daily Trading Volume

Tool to retrieve daily trading volume data for specified instruments on Coinbase International Exchange.

Get Market Product Book

Get the current order book (market depth) for a specific product.

Get Product Details

Tool to retrieve detailed information about a specific product (trading pair) from Coinbase Exchange.

Get Product Order Book

Retrieves the order book for a specific product on Coinbase Exchange.

Get Products Ticker

Tool to get real-time ticker information for a specific product on Coinbase Exchange.

Get Products Volume Summary

Tool to retrieve volume summaries for all trading products on Coinbase Exchange.

Get Public Market Trades

Tool to get public market trades for a specific product (trading pair).

Get Server Time

Tool to retrieve the current server time from Coinbase Advanced Trade API.

Get Supported Networks

Tool to retrieve supported blockchain networks for a specific cryptocurrency asset on Coinbase International Exchange.

Get Wrapped Asset Conversion Rate

Tool to get the current conversion rate for a wrapped asset on Coinbase Exchange.

List Exchange Assets

Tool to retrieve all supported assets from the Coinbase International Exchange.

List All Known Currencies

Tool to get all known currencies from Coinbase Exchange API.

List Exchange Products

Tool to retrieve all known trading pairs from Coinbase Exchange.

List Instruments

Tool to list all instruments available for trading on Coinbase International Exchange.

List Instruments Candles

Tool to retrieve aggregated candle (OHLCV) data for instruments on Coinbase International Exchange.

List Loans Assets

Tool to retrieve all assets available for loans from the Coinbase Exchange.

List Market Products

Tool to list market products from Coinbase Advanced Trade API.

List Product Candles

Tool to retrieve historical candlestick (OHLCV) data for a specific trading product on Coinbase Advanced Trade.

List Product Candles

Tool to retrieve historical candlestick (OHLCV) data for a trading pair.

List Products Stats

Tool to get 24-hour statistics for a product on Coinbase Exchange.

List Products Trades

Tool to retrieve recent trades for a specific product from Coinbase Exchange API.

List Wallets

Retrieve all wallets from Coinbase via the CDP SDK.

List Wrapped Assets

Tool to retrieve all wrapped assets from Coinbase Exchange.

FRAMEWORKS

How to build Coinbase MCP Agent with another framework

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ChatGPT

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OpenAI Agents SDK

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Claude Code logo

Claude Code

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Claude Cowork logo

Claude Cowork

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Codex logo

Codex

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Cursor logo

Cursor

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OpenClaw logo

OpenClaw

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Hermes logo

Hermes

Use Coinbase MCP with Hermes

CLI logo

CLI

Use Coinbase MCP with CLI

Google ADK logo

Google ADK

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LangChain logo

LangChain

Use Coinbase MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Coinbase MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Coinbase MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Coinbase MCP with LlamaIndex

CrewAI logo

CrewAI

Use Coinbase MCP with CrewAI

OpenCode logo

OpenCode

Use Coinbase MCP with OpenCode

VS Code logo

VS Code

Use Coinbase MCP with VS Code

FAQ

Frequently asked questions

With a standalone Coinbase MCP server, the agents and LLMs can only access a fixed set of Coinbase tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Coinbase and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Agent SDK fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Coinbase tools.

Yes, absolutely. You can configure which Coinbase scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Coinbase data and credentials are handled as safely as possible.

Start with Coinbase.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Coinbase tool your agent needs.Free to start.

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A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

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As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

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Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

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With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

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