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How to integrate Zoho mail MCP with Claude Agent SDK

Connect Claude Agent SDK to Zoho mail MCP. Send a follow-up email to yesterday's meeting attendees, list unread emails from your manager, and more using natural language, with authentication handled for you.

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Zoho mail

Oauth2

Zoho Mail is a secure and ad-free email hosting platform with collaboration features. It helps businesses communicate efficiently while maintaining privacy and administrative control.

45 Tools

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Introduction

This guide walks you through connecting Zoho mail to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Zoho mail agent that can send and reply to emails, search messages, organize folders and labels, download attachments, and create tasks through natural language commands.

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

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

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 Zoho mail
Configure an AI agent that can use Zoho mail as a tool
Run a live chat session where you can ask the agent to perform Zoho mail 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 Zoho mail MCP server, and what's possible with it?

The Zoho mail MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Zoho mail account. It provides structured and secure access to your mailbox, so your agent can perform actions like searching emails, sending messages, managing folders, organizing conversations, and handling attachments on your behalf.

Smart email search and filtering: Ask your agent to find emails based on sender, subject, keywords, or date ranges for quick information retrieval.
Automated composing and sending: Let your agent draft and send new emails, reply to existing threads, or create message templates to streamline communication.
Folder and label organization: Have your agent organize your inbox by moving messages to folders, applying tags, or archiving threads for a clutter-free workspace.
Attachment management: Retrieve, download, or send attachments through your agent—making file sharing and access seamless within your email workflow.
Bulk message actions: Instruct your agent to mark emails as read or unread, star important messages, or clean up your inbox by deleting or archiving in bulk.

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:

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

Step-by-step Guide

Step by step09 STEPS

Prerequisites

Before starting, make sure you have:

Composio API Key and Claude/Anthropic API Key
Primary know-how of Claude Agents SDK
A Zoho mail account
Some knowledge of Python

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.

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

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

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 Zoho mail functionality

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 Zoho mail
  const session = await composio.create(USER_ID, {
    toolkits: ['zoho_mail'],
  });
  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 Zoho mail
The returned url is the MCP server URL that your agent will use

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 Zoho mail 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 Zoho mail
maxTurns: 10 limits the conversation length to prevent excessive API usage

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'

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 Zoho mail 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: ['zoho_mail']
  });
  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 Zoho mail 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 Zoho mail 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 Zoho mail action and event your agent gets out of the box.

Create Signature

Create a signature, optionally assign it to users, and return it.

Get Signatures

List all connected-user signatures or retrieve one signature by ID.

List Zoho Mail Accounts

Retrieves all Zoho Mail accounts associated with the authenticated user.

Update Account Display Name

Update the display name of a Zoho Mail account owned by the user.

Delete Label

Delete a label and remove it from associated Zoho Mail messages.

Create Folder

Create a folder in a Zoho Mail account and return its folder record.

Delete Folder

Delete a folder from a Zoho Mail account.

Get Folder

Retrieve one Zoho Mail folder by account and folder ID.

List Folders

List every folder in a Zoho Mail account.

Update Folder

Rename or move a Zoho Mail folder, or enable or disable its IMAP visibility, and return its observed state from a follow-up read.

Delete Groups in Bulk

Delete multiple groups in a single API call.

Delete Group

Tool to delete a specific mail group by its zgid.

Get Organization Group

Retrieve one Zoho Mail organization group, including members and settings.

List Moderated Messages

List messages held for moderation in one Zoho Mail organization group.

Moderate Messages

Release held group messages for delivery or permanently reject them.

Create Label

Create a label in a Zoho Mail account and return its identifiers.

List Labels

List every label configured in a Zoho Mail account.

List Bookmarks

Tool to retrieve all personal bookmarks from a Zoho Mail account.

List Organization Accounts

List one offset-paginated page of accounts managed by a Zoho organization.

List Organization Domains

List mail domains configured for a Zoho Mail organization.

Manage Domain Addresses

Add or permanently remove domain aliases, catch-all delivery, and notification addresses.

Manage Domain DKIM

Add, verify, regenerate, default, or delete a domain DKIM selector.

Manage Domain Hosting

Set a primary domain or enable/disable mail hosting and subdomain stripping.

Create Email Draft

Tool to create and save an email draft in Zoho Mail without sending it.

Delete Email

Move one Zoho Mail email to trash or permanently delete it.

Download Attachment

Download one attachment from a Zoho Mail message as a file.

Get Attachment Info

Get normal and optional inline attachment metadata for one message.

Get Message Content

Tool to retrieve the full content/body of a specific Zoho Mail email.

Get Message Headers

Get one email's internet message headers without flattening repeated values.

Get Message Metadata

Retrieve one email's complete metadata record by account, folder, and message ID.

List Emails

Tool to retrieve a list of emails from a Zoho Mail account folder.

Reply to Email

Send or schedule a reply while preserving the original message thread.

Send Email

Send an email immediately or schedule it for later delivery.

Update Messages

Batch-update message or thread read, folder, flag, label, archive, or spam state.

Get Organization User Storage Details

Tool to retrieve storage details for a specific user in the organization.

Update Organization Spam Process Type

Tool to update organization spam processing type.

Update User Storage

Updates a user's storage allocation within a Zoho Mail organization.

Search Messages

Tool to search emails in a Zoho Mail account using Zoho's searchKey syntax.

Create Group Task

Create a task in a Zoho Mail group.

Create Personal Task

Create a personal task for the connected Zoho Mail user.

List Personal Tasks

List one offset-paginated page of personal tasks for the connected Zoho Mail user.

Update Group Task

Update one documented field on a task in a Zoho Mail group.

Update Group Settings

Tool to update group settings.

Update Organization Account

Enable or disable an external account, or update incoming, outgoing, IMAP, POP, or ActiveSync status for an organization-managed mailbox.

Verify Domain Records

Verify domain ownership, SPF, or MX DNS records for a Zoho Mail domain.

FRAMEWORKS

How to build Zoho mail MCP Agent with another framework

Claude Code

Use Zoho mail MCP with Claude Code

Cursor

Use Zoho mail MCP with Cursor

ChatGPT

Use Zoho mail MCP with ChatGPT

Claude Cowork

Use Zoho mail MCP with Claude Cowork

Antigravity

Use Zoho mail MCP with Antigravity

OpenAI Agents SDK

Use Zoho mail MCP with OpenAI Agents SDK

Codex

Use Zoho mail MCP with Codex

Grok Build

Use Zoho mail MCP with Grok Build

VS Code

Use Zoho mail MCP with VS Code

OpenCode

Use Zoho mail MCP with OpenCode

OpenClaw

Use Zoho mail MCP with OpenClaw

Hermes

Use Zoho mail MCP with Hermes

Atomic Agent

Use Zoho mail MCP with Atomic Agent

Pi

Use Zoho mail MCP with Pi

DeepSeek Harness

Use Zoho mail MCP with DeepSeek Harness

Google ADK

Use Zoho mail MCP with Google ADK

LangChain

Use Zoho mail MCP with LangChain

Vercel AI SDK

Use Zoho mail MCP with Vercel AI SDK

Mastra AI

Use Zoho mail MCP with Mastra AI

LlamaIndex

Use Zoho mail MCP with LlamaIndex

CrewAI

Use Zoho mail MCP with CrewAI

Pydantic AI

Use Zoho mail MCP with Pydantic AI

AutoGen

Use Zoho mail MCP with AutoGen

MORE TOOLKITS

Explore Other Toolkits

Toolkit marketplace

Gmail

Oauth2

Gmail is Google's email service with powerful spam protection, search, and G Suite integration. It keeps your inbox organized and makes communication fast and reliable.

Outlook

Oauth2S2s Oauth2

Outlook is Microsoft's email and calendaring platform for unified communications and scheduling. It helps users stay organized with powerful email, contacts, and calendar management.

Slack

Oauth2

Slack is a channel-based messaging platform for teams and organizations. It helps people collaborate in real time, share files, and connect all their tools in one place.

Gong

BasicOauth2

Gong is a platform for video meetings, call recording, and team collaboration. It helps teams capture conversations, analyze calls, and turn insights into action.

FAQ

Frequently asked questions

With a standalone Zoho mail MCP server, the agents and LLMs can only access a fixed set of Zoho mail tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Zoho mail 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 Zoho mail tools.

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

Start with Zoho mail.It takes 30 seconds.

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

Start building

How to integrate Zoho mail MCP with Claude Agent SDK

Connect Zoho mail without auth hassles

Introduction

Also integrate Zoho mail with

TL;DR

What is Claude Agent SDK?

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

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

What is Composio SDK?

How the Composio SDK works

Step-by-step Guide

Prerequisites

Getting API Keys for Claude/Anthropic and Composio

Install dependencies

Set up environment variables

Import dependencies

Create a Composio instance and Tool Router session

Configure Claude Agent with MCP

Create client and start chat loop

Run the application

Complete Code

Conclusion

Supported Tools

How to build Zoho mail MCP Agent with another framework

Claude Code

Cursor

ChatGPT

Claude Cowork

Antigravity

OpenAI Agents SDK

Codex

Grok Build

VS Code

OpenCode

OpenClaw

Hermes

Atomic Agent

Pi

DeepSeek Harness

Google ADK

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Pydantic AI

AutoGen

Explore Other Toolkits

Gmail

Outlook

Slack

Gong

Frequently asked questions

What are the differences in Tool Router MCP and Zoho mail MCP?

Can I use Tool Router MCP with Claude Agent SDK?

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

How safe is my data with Composio Tool Router?

Start with Zoho mail.It takes 30 seconds.