How to integrate Etermin MCP with Claude Code

Manage your Etermin directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns. You can do this in two different ways: Via Composio Connect - Direct and easiest approach Via Composio SDK - Programmatic approach with more control

Etermin logoEtermin
Api Key

eTermin is an online appointment scheduling platform for businesses to manage bookings. It streamlines client appointments, saving time and reducing scheduling conflicts.

78 Tools

Introduction

Manage your Etermin directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns.

You can do this in two different ways:

  1. Via Composio Connect - Direct and easiest approach
  2. Via Composio SDK - Programmatic approach with more control

Also integrate Etermin with

Why use Composio?

  • Only one MCP URL to connect multiple apps with Claude Code with zero auth hassles.
  • Programmatic tool calling allows LLMs to write its code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Handling Large tool responses out of LLM context to minimize context rot.
  • Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so LLMs aren't overwhelmed by tools you don't need.

Connecting Etermin to Claude Code using Composio

1. Add the Composio MCP to Claude

Terminal

2. Start Claude Code

bash
claude

3. Open your MCP list

bash
/mcp

4. Select Composio and click on Authenticate

Select Composio and click Authenticate

5. This will redirect you to the Composio OAuth page. Complete the flow by authorizing Composio and you're all set.

Composio OAuth authorization page
Composio authorization complete
Ask Claude to connect to your account and authenticate via the link

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.

Connecting Etermin via Composio SDK

Composio SDK is the underlying tech that powers Rube. It's a universal gateway that does everything Rube does but with much more programmatic control. You can programmatically generate an MCP URL with the app you need (here Etermin) for even more tool search precision. It's secure and reliable.

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 step10 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Claude Pro, Max, or API billing enabled Anthropic account
  • Composio API Key
  • A Etermin account
  • Basic knowledge of Python or TypeScript
2

Install Claude Code

bash
# macOS, Linux, WSL
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell
irm https://claude.ai/install.ps1 | iex

# Windows CMD
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd

To install Claude Code, use one of the following methods based on your operating system:

3

Set up Claude Code

bash
cd your-project-folder
claude

Open a terminal, go to your project folder, and start Claude Code:

  • Claude Code will open in your terminal
  • Follow the prompts to sign in with your Anthropic account
  • Complete the authentication flow
  • Once authenticated, you can start using Claude Code
Claude Code initial setup showing sign-in prompt
Claude Code terminal after successful login
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here

Create a .env file in your project root with the following variables:

  • COMPOSIO_API_KEY authenticates with Composio (get it from Composio dashboard)
  • USER_ID identifies the user for session management (use any unique identifier)
5

Install Composio library

npm install @composio/core dotenv

Install the Composio TypeScript library to create MCP sessions.

  • @composio/core provides the core Composio functionality
  • dotenv loads environment variables from your .env file
6

Generate Composio MCP URL

import 'dotenv/config';
import { Composio } from '@composio/core';

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 composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['etermin'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http etermin-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Create a script to generate a Composio MCP URL for Etermin. This URL will be used to connect Claude Code to Etermin.

What's happening

  • We import the Composio client and load environment variables
  • Create a Composio instance with your API key
  • Call create() to create a Tool Router session for Etermin
  • The returned mcp.url is the MCP server URL that Claude Code will use
  • The script prints this URL so you can copy it
7

Run the script and copy the MCP URL

node --loader ts-node/esm generate_mcp_url.ts
# or if using tsx
tsx generate_mcp_url.ts

Run your TypeScript script to generate the MCP URL.

  • The script connects to Composio and creates a Tool Router session
  • It prints the MCP URL and the exact command you need to run
  • Copy the entire claude mcp add command from the output
8

Add Etermin MCP to Claude Code

bash
claude mcp add --transport http etermin-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"

# Then restart Claude Code
exit
claude

In your terminal, add the MCP server using the command from the previous step. The command format is:

  • claude mcp add registers a new MCP server with Claude Code
  • --transport http specifies that this is an HTTP-based MCP server
  • The server name (etermin-composio) is how you'll reference it
  • The URL points to your Composio Tool Router session
  • --headers includes your Composio API key for authentication

After running the command, close the current Claude Code session and start a new one for the changes to take effect.

9

Verify the installation

bash
claude mcp list

Check that your Etermin MCP server is properly configured.

  • This command lists all MCP servers registered with Claude Code
  • You should see your etermin-composio entry in the list
  • This confirms that Claude Code can now access Etermin tools

If everything is wired up, you should see your etermin-composio entry listed:

Claude Code MCP list showing the toolkit MCP server
10

Authenticate Etermin

The first time you try to use Etermin tools, you'll be prompted to authenticate.

  • Claude Code will detect that you need to authenticate with Etermin
  • It will show you an authentication link
  • Open the link in your browser (or copy/paste it)
  • Complete the Etermin authorization flow
  • Return to the terminal and start using Etermin through Claude Code

Once authenticated, you can ask Claude Code to perform Etermin operations in natural language. For example:

  • "Add new client contact for booking"
  • "Remove canceled appointment from calendar"
  • "Create voucher for returning customer"

Complete Code

Here's the complete code to get you started with Etermin and Claude Code:

import 'dotenv/config';
import { Composio } from '@composio/core';

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 composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['etermin'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http etermin-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Conclusion

You've successfully integrated Etermin with Claude Code using Composio's MCP server. Now you can interact with Etermin directly from your terminal using natural language commands.

Key features of this setup:

  • Terminal-native experience without switching contexts
  • Natural language commands for Etermin operations
  • Secure authentication through Composio's managed MCP
  • Tool Router for dynamic tool discovery and execution

Next steps:

  • Try asking Claude Code to perform various Etermin operations
  • Add more toolkits to your Tool Router session for multi-app workflows
  • Integrate this setup into your development workflow for increased productivity

You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.

TOOLS

Supported Tools

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

Assign Calendar Service

Tool to assign a service to a calendar in eTermin.

Create Absence

Tool to create an absence (non-working time) for a specific calendar.

Create Anchortime

Tool to create anchortimes (recurring time slots) in a calendar.

Create Anchortime by Date

Tool to create anchortimes by date.

Create Appointment

Tool to create a new appointment in eTermin.

Create Appointment via Sync

Tool to create an appointment via sync in eTermin.

Create Calendar Return Time

Tool to create a return time for a calendar.

Create Contact

Tool to create a new contact in eTermin.

Create Service

Tool to create a new service in eTermin.

Create Service Group

Tool to create a new service group in eTermin.

Create User

Tool to create a new user.

Create Usermapping

Tool to create a new usermapping in eTermin.

Create Voucher

Creates a new discount voucher in eTermin.

Create Webhook

Creates a webhook (web push notification) in eTermin to receive real-time updates about appointments.

Create Working Time

Tool to create a new working time slot in eTermin.

Create Working Times Date

Tool to create a working times date slot for a calendar.

Delete Absence

Tool to delete an absence (non-working time) from a calendar.

Delete Anchortime

Delete an anchortime from eTermin by its ID.

Delete Anchortime By Date

Delete an anchortime by date using its ID.

Delete Appointment

Delete an existing appointment by its ID.

Delete Appointment via Sync

Tool to delete appointments via the sync endpoint.

Delete Calendar

Delete a calendar from your eTermin account.

Delete Calendar Return Time

Delete a return time from a calendar.

Delete Calendar Service

Delete an assigned service from a calendar in eTermin.

Delete Contact

Delete a contact from your eTermin account by its contact ID.

Delete Resource

Delete an eTermin resource by type and ID.

Delete Service

Permanently deletes a service from your eTermin account by its ID.

Delete Service Group

Delete a service group from your eTermin account by its ID.

Delete User

Deletes an existing user from the eTermin account.

Delete Usermapping

Delete a usermapping by its ID.

Delete Voucher

Permanently deletes a voucher from eTermin by its voucher code.

Delete Webhook

Delete an existing webhook by its unique identifier.

Delete Working Times

Tool to delete working times from a calendar.

Delete Working Times Date

Tool to delete working times date entries from eTermin.

Get Absences

Tool to retrieve absences (non-working times) for a specific calendar.

Get Anchortime by Date

Tool to retrieve anchortimes by date.

Get Anchortimes

Tool to retrieve anchortime details.

Get Appointment Sync

Tool to synchronize appointments incrementally from eTermin.

Get Bookingpage Logs

Tool to retrieve bookingpage request logs from eTermin.

Get Calendar Return Time

Tool to retrieve return times for a specific calendar.

Get Calendars

Tool to retrieve calendars.

Get Calendar Service Assignments

Tool to retrieve calendar service assignments.

Get Company

Tool to retrieve company account details.

Get Contact By ID

Tool to retrieve a specific contact by ID, external ID, or email.

Get Contacts

Tool to retrieve a list of contacts.

Get Deleted Appointments

Tool to retrieve a list of deleted appointments from eTermin.

Get Message Logs

Tool to retrieve message logs from eTermin.

Get Customer Ratings

Tool to retrieve a list of customer ratings from eTermin.

Get Service By ID

Tool to retrieve a specific service from eTermin.

Get Service Calendar

Tool to retrieve calendars for a specific service ID.

Get Service Group

Tool to retrieve service group details from eTermin.

Get Services

Tool to retrieve a list of services.

Get Survey Results

Tool to retrieve survey results from eTermin.

Get Timeslots

Tool to retrieve available timeslots for a specific calendar on a given date.

Get Usermapping

Tool to retrieve usermapping information.

Get Users

Tool to retrieve a list of users.

Get Working Times

Tool to retrieve working times for a specific calendar.

Get Working Times Date

Tool to retrieve working times for a specific calendar on a specific date.

List Appointments

Tool to retrieve a filtered list of appointments from eTermin in a specified date range.

List Vouchers

Retrieve all vouchers (discount codes) from your eTermin account.

List Webhooks

Tool to retrieve webhooks.

Update Service via PUT

Tool to update a service in eTermin.

Update Absence

Tool to update an absence (non-working time) for a calendar in eTermin.

Update Anchortime

Update an existing anchortime in eTermin.

Update Anchortime By Date

Tool to update anchortimes by date in eTermin.

Update Appointment

Tool to update an existing appointment in eTermin.

Update Calendar

Update an existing calendar in eTermin.

Update Calendar Return Time

Tool to update a return time for a calendar in eTermin.

Update Contact

Tool to update an existing contact in eTermin.

Update Resource

Update an existing eTermin resource (contact, service, calendar, user, or voucher).

Update Service

Tool to update an existing service.

Update Service Group

Tool to update an existing service group in eTermin.

Update Synchronised Appointment

Tool to update a synchronised appointment in eTermin.

Update Usermapping

Update an existing usermapping in eTermin.

Update Voucher

Updates an existing voucher in eTermin.

Update Webhook

Update an existing webhook configuration in eTermin.

Update Working Times

Tool to update working times for a calendar in eTermin.

Update Working Times Date

Tool to update working times date for a calendar.

FAQ

Frequently asked questions

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.

Yes, you can. Claude Code 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.

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.

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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