zoho-mail-mcp

A Model Context Protocol server for Zoho Mail. Lets Claude (or any MCP client) read, search, and send email from a Zoho Mail account without browser automation.

No equivalent exists in the official MCP registry — this fills that gap.

Tools

Related MCP server: mcp-gmail

Prerequisites

• A Zoho Mail account

• Node.js 18+

Setup

1. Create a Zoho OAuth app

1. Go to Zoho API Console

2. Create a Self Client application

3. Under Generate Code, add these scopes:

   ZohoMail.messages.READ,ZohoMail.messages.CREATE,ZohoMail.folders.READ,ZohoMail.accounts.READ

4. Set expiry to 10 minutes, add a description, click Create

5. Copy the generated client_id, client_secret, and grant code

2. Exchange the grant code for a refresh token

Run immediately (grant code expires in 10 minutes):

curl -X POST https://accounts.zoho.com/oauth/v2/token \
  -d "grant_type=authorization_code" \
  -d "client_id=YOUR_CLIENT_ID" \
  -d "client_secret=YOUR_CLIENT_SECRET" \
  -d "code=YOUR_GRANT_CODE"

Save the refresh_token from the response — it doesn't expire.

3. Get your account ID

curl -X GET https://mail.zoho.com/api/accounts \
  -H "Authorization: Zoho-oauthtoken YOUR_ACCESS_TOKEN"

Use the accountId value from the first object in data[].

4. Install

git clone https://github.com/SirGreed808/zoho-mail-mcp
cd zoho-mail-mcp
npm install

5. Add to Claude Code

claude mcp add --scope user \
  -e "ZOHO_CLIENT_ID=..." \
  -e "ZOHO_CLIENT_SECRET=..." \
  -e "ZOHO_REFRESH_TOKEN=..." \
  -e "ZOHO_ACCOUNT_ID=..." \
  -e "ZOHO_SENDER=you@yourdomain.com" \
  zoho-mail -- node /absolute/path/to/zoho-mail-mcp/index.js

ZOHO_SENDER must be a verified address or alias on the account.

Environment Variables

Notes

• Access tokens are refreshed automatically — no manual intervention needed

• read_email requires both messageId and folderId, both returned by list_inbox and search_emails

• Only REST API — no IMAP/SMTP

License

MIT