How to integrate Dynosend MCP with CrewAI

This guide walks you through connecting Dynosend to CrewAI using the Composio tool router. By the end, you'll have a working Dynosend agent that can add contact to newsletter audience, summarize latest campaign engagement metrics, track signup event for customer through natural language commands. This guide will help you understand how to give your CrewAI agent real control over a Dynosend account through Composio's Dynosend MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Dynosend is an email marketing platform for audiences, contacts, campaigns, transactional messages, and customer events. Use it to manage lifecycle email, track engagement, and keep customer communication organized.

18 Tools

Introduction

This guide walks you through connecting Dynosend to CrewAI using the Composio tool router. By the end, you'll have a working Dynosend agent that can add contact to newsletter audience, summarize latest campaign engagement metrics, track signup event for customer through natural language commands.

This guide will help you understand how to give your CrewAI agent real control over a Dynosend account through Composio's Dynosend MCP server.

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

Also integrate Dynosend with

OpenAI Agents SDKClaude Agent SDKClaude CodeClaude CoworkCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndex

TL;DR

Here's what you'll learn:
  • Get a Composio API key and configure your Dynosend connection
  • Set up CrewAI with an MCP enabled agent
  • Create a Tool Router session or standalone MCP server for Dynosend
  • Build a conversational loop where your agent can execute Dynosend operations

What is CrewAI?

CrewAI is a powerful framework for building multi-agent AI systems. It provides primitives for defining agents with specific roles, creating tasks, and orchestrating workflows through crews.

Key features include:

  • Agent Roles: Define specialized agents with specific goals and backstories
  • Task Management: Create tasks with clear descriptions and expected outputs
  • Crew Orchestration: Combine agents and tasks into collaborative workflows
  • MCP Integration: Connect to external tools through Model Context Protocol

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

The Dynosend MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Dynosend account. It provides structured and secure access to your audiences, contacts, campaigns, transactional messages, and customer events, so your agent can manage contacts, operate campaigns, send transactional messages, track customer activity, and maintain your blacklist on your behalf.

  • Audience and contact management: Have your agent list audiences, create or update contacts, manage tags and custom fields, find duplicate contacts, and delete contacts when required for privacy compliance.
  • Subscription and blacklist control: Let the agent subscribe or unsubscribe contacts, check whether an email is blacklisted, and add addresses to the blacklist when needed.
  • Campaign operations and insights: Direct your agent to list campaigns, review delivery and engagement results, start ready campaigns, or pause and resume campaign delivery.
  • Transactional email delivery: Instruct your agent to send configured transactional messages through your Dynosend account.
  • Customer event tracking: Have your agent record application events for contacts to keep customer activity available in Dynosend.

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 step08 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Python 3.9 or higher
  • A Composio account and API key
  • A Dynosend connection authorized in Composio
  • An OpenAI API key for the CrewAI LLM
  • Basic familiarity with Python
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 crewai crewai-tools[mcp] python-dotenv
What's happening:
  • composio connects your agent to Dynosend via MCP
  • crewai provides Agent, Task, Crew, and LLM primitives
  • crewai-tools[mcp] includes MCP helpers
  • python-dotenv loads environment variables from .env
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_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates with Composio
  • USER_ID scopes the session to your account
  • OPENAI_API_KEY lets CrewAI use your chosen OpenAI model
5

Import dependencies

python
import os
from composio import Composio
from crewai import Agent, Task, Crew
from crewai_tools import MCPServerAdapter
import dotenv

dotenv.load_dotenv()

COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set")
What's happening:
  • CrewAI classes define agents and tasks, and run the workflow
  • MCPServerHTTP connects the agent to an MCP endpoint
  • Composio will give you a short lived Dynosend MCP URL
6

Create a Composio Tool Router session for Dynosend

python
composio_client = Composio(api_key=COMPOSIO_API_KEY)
session = composio_client.create(user_id=COMPOSIO_USER_ID, toolkits=["dynosend"])

url = session.mcp.url
What's happening:
  • You create a Dynosend only session through Composio
  • Composio returns an MCP HTTP URL that exposes Dynosend tools
7

Initialize the MCP Server

python
server_params = {
    "url": url,
    "transport": "streamable-http",
    "headers": {"x-api-key": COMPOSIO_API_KEY},
}

with MCPServerAdapter(server_params) as tools:
    agent = Agent(
        role="Search Assistant",
        goal="Help users search the internet effectively",
        backstory="You are a helpful assistant with access to search tools.",
        tools=tools,
        verbose=False,
        max_iter=10,
    )
What's Happening:
  • Server Configuration: The code sets up connection parameters including the MCP server URL, streamable HTTP transport, and Composio API key authentication.
  • MCP Adapter Bridge: MCPServerAdapter acts as a context manager that converts Composio MCP tools into a CrewAI-compatible format.
  • Agent Setup: Creates a CrewAI Agent with a defined role (Search Assistant), goal (help with internet searches), and access to the MCP tools.
  • Configuration Options: The agent includes settings like verbose=False for clean output and max_iter=10 to prevent infinite loops.
  • Dynamic Tool Usage: Once created, the agent automatically accesses all Composio Search tools and decides when to use them based on user queries.
8

Create a CLI Chatloop and define the Crew

python
print("Chat started! Type 'exit' or 'quit' to end.\n")

conversation_context = ""

while True:
    user_input = input("You: ").strip()

    if user_input.lower() in ["exit", "quit", "bye"]:
        print("\nGoodbye!")
        break

    if not user_input:
        continue

    conversation_context += f"\nUser: {user_input}\n"
    print("\nAgent is thinking...\n")

    task = Task(
        description=(
            f"Conversation history:\n{conversation_context}\n\n"
            f"Current request: {user_input}"
        ),
        expected_output="A helpful response addressing the user's request",
        agent=agent,
    )

    crew = Crew(agents=[agent], tasks=[task], verbose=False)
    result = crew.kickoff()
    response = str(result)

    conversation_context += f"Agent: {response}\n"
    print(f"Agent: {response}\n")
What's Happening:
  • Interactive CLI Setup: The code creates an infinite loop that continuously prompts for user input and maintains the entire conversation history in a string variable.
  • Input Validation: Empty inputs are ignored to prevent processing blank messages and keep the conversation clean.
  • Context Building: Each user message is appended to the conversation context, which preserves the full dialogue history for better agent responses.
  • Dynamic Task Creation: For every user input, a new Task is created that includes both the full conversation history and the current request as context.
  • Crew Execution: A Crew is instantiated with the agent and task, then kicked off to process the request and generate a response.
  • Response Management: The agent's response is converted to a string, added to the conversation context, and displayed to the user, maintaining conversational continuity.

Complete Code

Here's the complete code to get you started with Dynosend and CrewAI:

python
from crewai import Agent, Task, Crew, LLM
from crewai_tools import MCPServerAdapter
from composio import Composio
from dotenv import load_dotenv
import os

load_dotenv()

GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in the environment.")
if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set in the environment.")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set in the environment.")

# Initialize Composio and create a session
composio = Composio(api_key=COMPOSIO_API_KEY)
session = composio.create(
    user_id=COMPOSIO_USER_ID,
    toolkits=["dynosend"],
)
url = session.mcp.url

# Configure LLM
llm = LLM(
    model="gpt-5",
    api_key=os.getenv("OPENAI_API_KEY"),
)

server_params = {
    "url": url,
    "transport": "streamable-http",
    "headers": {"x-api-key": COMPOSIO_API_KEY},
}

with MCPServerAdapter(server_params) as tools:
    agent = Agent(
        role="Search Assistant",
        goal="Help users with internet searches",
        backstory="You are an expert assistant with access to Composio Search tools.",
        tools=tools,
        llm=llm,
        verbose=False,
        max_iter=10,
    )

    print("Chat started! Type 'exit' or 'quit' to end.\n")

    conversation_context = ""

    while True:
        user_input = input("You: ").strip()

        if user_input.lower() in ["exit", "quit", "bye"]:
            print("\nGoodbye!")
            break

        if not user_input:
            continue

        conversation_context += f"\nUser: {user_input}\n"
        print("\nAgent is thinking...\n")

        task = Task(
            description=(
                f"Conversation history:\n{conversation_context}\n\n"
                f"Current request: {user_input}"
            ),
            expected_output="A helpful response addressing the user's request",
            agent=agent,
        )

        crew = Crew(agents=[agent], tasks=[task], verbose=False)
        result = crew.kickoff()
        response = str(result)

        conversation_context += f"Agent: {response}\n"
        print(f"Agent: {response}\n")

Conclusion

You now have a CrewAI agent connected to Dynosend through Composio's Tool Router. The agent can perform Dynosend operations through natural language commands.

Next steps:

  • Add role-specific instructions to customize agent behavior
  • Plug in more toolkits for multi-app workflows
  • Chain tasks for complex multi-step operations
TOOLS

Supported Tools

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

Add Email To Blacklist

Permanently add an email address to the Dynosend blacklist.

Add Tags To Contact

Append one or more tags to a contact without replacing its existing tags.

Check Blacklist

Check whether an email address is on the connected Dynosend account's blacklist and return its timestamp and reason when available.

Create Contact

Create a contact in an audience, optionally assigning tags and audience-defined custom fields.

Delete Contact

Permanently delete one contact from an audience for GDPR/CCPA erasure.

Find Duplicate Contacts

Find contacts that use the same email address across all audiences in the connected Dynosend account.

Get Audience

Get one audience's configuration, custom-field definitions, contact information, and subscription statistics by audience UID.

Get Campaign

Get one campaign's configuration and delivery, open, click, spam, bounce, and unsubscribe insights.

Get Contact

Get one contact in an audience by contact UID or email address.

List Audiences

List audiences available to the connected Dynosend account, including the UID needed by audience and contact tools.

List Campaigns

List campaigns in the connected Dynosend account, including status and the campaign UID used by campaign tools.

List Contacts

Return one page of contacts in a Dynosend audience, including contact UIDs, subscription status, tags, and audience-defined custom-field values.

Record Contact Event

Record an application event for a contact in an audience.

Send Transactional Message

Send a configured Dynosend transactional message.

Set Campaign Delivery State

Pause a sending campaign or resume a paused campaign by setting its delivery state to paused or sending.

Set Contact Subscription Status

Set a contact's subscription status to subscribed or unsubscribed in an audience.

Start Campaign

Start a ready broadcast campaign.

Update Contact

Update a contact's email, replace its complete tag set, or set audience-defined custom fields.

FRAMEWORKS

How to build Dynosend MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Dynosend MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Dynosend MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Dynosend MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Dynosend MCP with Claude Cowork

Codex logo

Codex

Use Dynosend MCP with Codex

OpenClaw logo

OpenClaw

Use Dynosend MCP with OpenClaw

Hermes logo

Hermes

Use Dynosend MCP with Hermes

CLI logo

CLI

Use Dynosend MCP with CLI

Google ADK logo

Google ADK

Use Dynosend MCP with Google ADK

LangChain logo

LangChain

Use Dynosend MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Dynosend MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Dynosend MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Dynosend MCP with LlamaIndex

FAQ

Frequently asked questions

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

Yes, you can. CrewAI 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 Dynosend tools.

Yes, absolutely. You can configure which Dynosend 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 Dynosend data and credentials are handled as safely as possible.

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