How to integrate Etermin MCP with CrewAI

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Introduction

This guide walks you through connecting Etermin to CrewAI using the Composio tool router. By the end, you'll have a working Etermin agent that can add new client contact for booking, remove canceled appointment from calendar, create voucher for returning customer through natural language commands.

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

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

Also integrate Etermin with

TL;DR

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

The Etermin MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Etermin account. It provides structured and secure access to your appointment scheduling system, so your agent can perform actions like creating contacts, managing bookings, updating resources, and handling calendar events on your behalf.

  • Automated contact and user creation: Instantly add new clients or team members to your Etermin account, streamlining onboarding and customer management.
  • Effortless appointment and calendar management: Let your agent delete existing appointments or calendars, freeing up schedules and reducing manual work.
  • Resource and service administration: Automatically create or remove resources and services, ensuring your booking system stays current as your business evolves.
  • Voucher and webhook setup: Quickly generate new vouchers for promotions or set up webhooks for real-time event notifications and integrations.
  • Contact and service deletion: Easily remove outdated contacts or services, keeping your scheduling platform organized and clutter-free.

Supported Tools & Triggers

Tools
Assign Calendar ServiceTool to assign a service to a calendar in eTermin.
Create AbsenceTool to create an absence (non-working time) for a specific calendar.
Create AnchortimeTool to create anchortimes (recurring time slots) in a calendar.
Create Anchortime by DateTool to create anchortimes by date.
Create AppointmentTool to create a new appointment in eTermin.
Create Appointment via SyncTool to create an appointment via sync in eTermin.
Create Calendar Return TimeTool to create a return time for a calendar.
Create ContactTool to create a new contact in eTermin.
Create ServiceTool to create a new service in eTermin.
Create Service GroupTool to create a new service group in eTermin.
Create UserTool to create a new user.
Create UsermappingTool to create a new usermapping in eTermin.
Create VoucherCreates a new discount voucher in eTermin.
Create WebhookCreates a webhook (web push notification) in eTermin to receive real-time updates about appointments.
Create Working TimeTool to create a new working time slot in eTermin.
Create Working Times DateTool to create a working times date slot for a calendar.
Delete AbsenceTool to delete an absence (non-working time) from a calendar.
Delete AnchortimeDelete an anchortime from eTermin by its ID.
Delete Anchortime By DateDelete an anchortime by date using its ID.
Delete AppointmentDelete an existing appointment by its ID.
Delete Appointment via SyncTool to delete appointments via the sync endpoint.
Delete CalendarDelete a calendar from your eTermin account.
Delete Calendar Return TimeDelete a return time from a calendar.
Delete Calendar ServiceDelete an assigned service from a calendar in eTermin.
Delete ContactDelete a contact from your eTermin account by its contact ID.
Delete ResourceDelete an eTermin resource by type and ID.
Delete ServicePermanently deletes a service from your eTermin account by its ID.
Delete Service GroupDelete a service group from your eTermin account by its ID.
Delete UserDeletes an existing user from the eTermin account.
Delete UsermappingDelete a usermapping by its ID.
Delete VoucherPermanently deletes a voucher from eTermin by its voucher code.
Delete WebhookDelete an existing webhook by its unique identifier.
Delete Working TimesTool to delete working times from a calendar.
Delete Working Times DateTool to delete working times date entries from eTermin.
Get AbsencesTool to retrieve absences (non-working times) for a specific calendar.
Get Anchortime by DateTool to retrieve anchortimes by date.
Get AnchortimesTool to retrieve anchortime details.
Get Appointment SyncTool to synchronize appointments incrementally from eTermin.
Get Bookingpage LogsTool to retrieve bookingpage request logs from eTermin.
Get Calendar Return TimeTool to retrieve return times for a specific calendar.
Get CalendarsTool to retrieve calendars.
Get Calendar Service AssignmentsTool to retrieve calendar service assignments.
Get CompanyTool to retrieve company account details.
Get Contact By IDTool to retrieve a specific contact by ID, external ID, or email.
Get ContactsTool to retrieve a list of contacts.
Get Deleted AppointmentsTool to retrieve a list of deleted appointments from eTermin.
Get Message LogsTool to retrieve message logs from eTermin.
Get Customer RatingsTool to retrieve a list of customer ratings from eTermin.
Get Service By IDTool to retrieve a specific service from eTermin.
Get Service CalendarTool to retrieve calendars for a specific service ID.
Get Service GroupTool to retrieve service group details from eTermin.
Get ServicesTool to retrieve a list of services.
Get Survey ResultsTool to retrieve survey results from eTermin.
Get TimeslotsTool to retrieve available timeslots for a specific calendar on a given date.
Get UsermappingTool to retrieve usermapping information.
Get UsersTool to retrieve a list of users.
Get Working TimesTool to retrieve working times for a specific calendar.
Get Working Times DateTool to retrieve working times for a specific calendar on a specific date.
List AppointmentsTool to retrieve a filtered list of appointments from eTermin in a specified date range.
List VouchersRetrieve all vouchers (discount codes) from your eTermin account.
List WebhooksTool to retrieve webhooks.
Update Service via PUTTool to update a service in eTermin.
Update AbsenceTool to update an absence (non-working time) for a calendar in eTermin.
Update AnchortimeUpdate an existing anchortime in eTermin.
Update Anchortime By DateTool to update anchortimes by date in eTermin.
Update AppointmentTool to update an existing appointment in eTermin.
Update CalendarUpdate an existing calendar in eTermin.
Update Calendar Return TimeTool to update a return time for a calendar in eTermin.
Update ContactTool to update an existing contact in eTermin.
Update ResourceUpdate an existing eTermin resource (contact, service, calendar, user, or voucher).
Update ServiceTool to update an existing service.
Update Service GroupTool to update an existing service group in eTermin.
Update Synchronised AppointmentTool to update a synchronised appointment in eTermin.
Update UsermappingUpdate an existing usermapping in eTermin.
Update VoucherUpdates an existing voucher in eTermin.
Update WebhookUpdate an existing webhook configuration in eTermin.
Update Working TimesTool to update working times for a calendar in eTermin.
Update Working Times DateTool to update working times date for a calendar.

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

Prerequisites

Before starting, make sure you have:
  • Python 3.9 or higher
  • A Composio account and API key
  • A Etermin connection authorized in Composio
  • An OpenAI API key for the CrewAI LLM
  • Basic familiarity with Python

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.

Install dependencies

bash
pip install composio crewai crewai-tools[mcp] python-dotenv
What's happening:
  • composio connects your agent to Etermin via MCP
  • crewai provides Agent, Task, Crew, and LLM primitives
  • crewai-tools[mcp] includes MCP helpers
  • python-dotenv loads environment variables from .env

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

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 Etermin MCP URL

Create a Composio Tool Router session for Etermin

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

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

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.

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 Etermin 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=["etermin"],
)
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 Etermin through Composio's Tool Router. The agent can perform Etermin 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

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FAQ

What are the differences in Tool Router MCP and Etermin MCP?

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

Can I use Tool Router MCP with CrewAI?

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 Etermin tools.

Can I manage the permissions and scopes for Etermin while using Tool Router?

Yes, absolutely. You can configure which Etermin 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.

How safe is my data with Composio Tool Router?

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 Etermin data and credentials are handled as safely as possible.

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