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How to integrate Coinbase MCP with Pydantic AI

Connect Pydantic AI to Coinbase MCP. Show all your coinbase wallet balances, list every crypto wallet i own, and more using natural language, with authentication handled for you.

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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 Pydantic AI using the Composio tool router. By the end, you'll have a working Coinbase agent that can check product tickers and order books, pull price candles and trades, list currencies and assets, and list your wallets through natural language commands.

This guide will help you understand how to give your Pydantic AI 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:
  • How to set up your Composio API key and User ID
  • How to create a Composio Tool Router session for Coinbase
  • How to attach an MCP Server to a Pydantic AI agent
  • How to stream responses and maintain chat history
  • How to build a simple REPL-style chat interface to test your Coinbase workflows

What is Pydantic AI?

Pydantic AI is a Python framework for building AI agents with strong typing and validation. It leverages Pydantic's data validation capabilities to create robust, type-safe AI applications.

Key features include:

  • Type Safety: Built on Pydantic for automatic data validation
  • MCP Support: Native support for Model Context Protocol servers
  • Streaming: Built-in support for streaming responses
  • Async First: Designed for async/await patterns

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 Coinbase market data, so your agent can explore trading pairs, check live quotes, review order books, analyze historical prices, and track recent trades on your behalf.

  • Live prices and product details: Have your agent check current ticker data, quotes, and trading details for a specific Coinbase trading pair.
  • Order book analysis: Direct your agent to review bids, asks, and market depth for a selected product.
  • Historical market research: Let the agent retrieve candlestick data and 24-hour statistics to examine price movements, volume, and recent performance.
  • Trade activity tracking: Instruct your agent to fetch recent public trades for a trading pair and summarize current market activity.
  • Asset and market discovery: Have your agent list supported assets, exchange products, market products, and available international trading instruments.

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:
  • Python 3.9 or higher
  • A Composio account with an active API key
  • Basic familiarity with Python and async programming
2

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard and create an API key. You'll need credits to use the models, or you can connect to another model provider.
  • 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

bash
pip install composio pydantic-ai python-dotenv

Install the required libraries.

What's happening:

  • composio connects your agent to external SaaS tools like Coinbase
  • pydantic-ai lets you create structured AI agents with tool support
  • python-dotenv loads your environment variables securely from a .env file
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
OPENAI_API_KEY=your_openai_api_key

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates your agent to Composio's API
  • USER_ID associates your session with your account for secure tool access
  • OPENAI_API_KEY to access OpenAI LLMs
5

Import dependencies

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerStreamableHTTP

load_dotenv()
What's happening:
  • We load environment variables and import required modules
  • Composio manages connections to Coinbase
  • MCPServerStreamableHTTP connects to the Coinbase MCP server endpoint
  • Agent from Pydantic AI lets you define and run the AI assistant
6

Create a Tool Router Session

python
async def main():
    api_key = os.getenv("COMPOSIO_API_KEY")
    user_id = os.getenv("USER_ID")
    if not api_key or not user_id:
        raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment")

    # Create a Composio Tool Router session for Coinbase
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["coinbase"],
    )
    url = session.mcp.url
    if not url:
        raise ValueError("Composio session did not return an MCP URL")
What's happening:
  • We're creating a Tool Router session that gives your agent access to Coinbase tools
  • The create method takes the user ID and specifies which toolkits should be available
  • The returned session.mcp.url is the MCP server URL that your agent will use
7

Initialize the Pydantic AI Agent

python
# Attach the MCP server to a Pydantic AI Agent
coinbase_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
agent = Agent(
    "openai:gpt-5",
    toolsets=[coinbase_mcp],
    instructions=(
        "You are a Coinbase assistant. Use Coinbase tools to help users "
        "with their requests. Ask clarifying questions when needed."
    ),
)
What's happening:
  • The MCP client connects to the Coinbase endpoint
  • The agent uses GPT-5 to interpret user commands and perform Coinbase operations
  • The instructions field defines the agent's role and behavior
8

Build the chat interface

python
# Simple REPL with message history
history = []
print("Chat started! Type 'exit' or 'quit' to end.\n")
print("Try asking the agent to help you with Coinbase.\n")

while True:
    user_input = input("You: ").strip()
    if user_input.lower() in {"exit", "quit", "bye"}:
        print("\nGoodbye!")
        break
    if not user_input:
        continue

    print("\nAgent is thinking...\n", flush=True)

    async with agent.run_stream(user_input, message_history=history) as stream_result:
        collected_text = ""
        async for chunk in stream_result.stream_output():
            text_piece = None
            if isinstance(chunk, str):
                text_piece = chunk
            elif hasattr(chunk, "delta") and isinstance(chunk.delta, str):
                text_piece = chunk.delta
            elif hasattr(chunk, "text"):
                text_piece = chunk.text
            if text_piece:
                collected_text += text_piece
        result = stream_result

    print(f"Agent: {collected_text}\n")
    history = result.all_messages()
What's happening:
  • The agent reads input from the terminal and streams its response
  • Coinbase API calls happen automatically under the hood
  • The model keeps conversation history to maintain context across turns
9

Run the application

python
if __name__ == "__main__":
    asyncio.run(main())
What's happening:
  • The asyncio loop launches the agent and keeps it running until you exit

Complete Code

Here's the complete code to get you started with Coinbase and Pydantic AI:

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerStreamableHTTP

load_dotenv()

async def main():
    api_key = os.getenv("COMPOSIO_API_KEY")
    user_id = os.getenv("USER_ID")
    if not api_key or not user_id:
        raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment")

    # Create a Composio Tool Router session for Coinbase
    composio = Composio(api_key=api_key)
    session = composio.create(
        user_id=user_id,
        toolkits=["coinbase"],
    )
    url = session.mcp.url
    if not url:
        raise ValueError("Composio session did not return an MCP URL")

    # Attach the MCP server to a Pydantic AI Agent
    coinbase_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY})
    agent = Agent(
        "openai:gpt-5",
        toolsets=[coinbase_mcp],
        instructions=(
            "You are a Coinbase assistant. Use Coinbase tools to help users "
            "with their requests. Ask clarifying questions when needed."
        ),
    )

    # Simple REPL with message history
    history = []
    print("Chat started! Type 'exit' or 'quit' to end.\n")
    print("Try asking the agent to help you with Coinbase.\n")

    while True:
        user_input = input("You: ").strip()
        if user_input.lower() in {"exit", "quit", "bye"}:
            print("\nGoodbye!")
            break
        if not user_input:
            continue

        print("\nAgent is thinking...\n", flush=True)

        async with agent.run_stream(user_input, message_history=history) as stream_result:
            collected_text = ""
            async for chunk in stream_result.stream_output():
                text_piece = None
                if isinstance(chunk, str):
                    text_piece = chunk
                elif hasattr(chunk, "delta") and isinstance(chunk.delta, str):
                    text_piece = chunk.delta
                elif hasattr(chunk, "text"):
                    text_piece = chunk.text
                if text_piece:
                    collected_text += text_piece
            result = stream_result

        print(f"Agent: {collected_text}\n")
        history = result.all_messages()

if __name__ == "__main__":
    asyncio.run(main())

Conclusion

You've built a Pydantic AI agent that can interact with Coinbase through Composio's Tool Router. With this setup, your agent can perform real Coinbase actions through natural language. You can extend this further by:
  • Adding other toolkits like Gmail, HubSpot, or Salesforce
  • Building a web-based chat interface around this agent
  • Using multiple MCP endpoints to enable cross-app workflows (for example, Gmail + Coinbase for workflow automation)
This architecture makes your AI agent "agent-native", able to securely use APIs in a unified, composable way without custom integrations.
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 a page of Coinbase account wallets and fiat accounts, with pagination information for navigating results.

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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Claude Code

Use Coinbase MCP with Claude Code

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Cursor

Use Coinbase MCP with Cursor

ChatGPT logo

ChatGPT

Use Coinbase MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use Coinbase MCP with Claude Cowork

Antigravity logo

Antigravity

Use Coinbase MCP with Antigravity

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Coinbase MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Coinbase MCP with Claude Agent SDK

Grok Bot logo

Grok Bot

Use Coinbase MCP with Grok Bot

Muse logo

Muse

Use Coinbase MCP with Muse

Codex logo

Codex

Use Coinbase MCP with Codex

Grok Build logo

Grok Build

Use Coinbase MCP with Grok Build

VS Code logo

VS Code

Use Coinbase MCP with VS Code

OpenCode logo

OpenCode

Use Coinbase MCP with OpenCode

OpenClaw logo

OpenClaw

Use Coinbase MCP with OpenClaw

Hermes logo

Hermes

Use Coinbase MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Coinbase MCP with Atomic Agent

Google ADK logo

Google ADK

Use Coinbase MCP with Google ADK

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

AutoGen logo

AutoGen

Use Coinbase MCP with AutoGen

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. Pydantic AI 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.

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