SirGreed808/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

Tool	Description
list_inbox	List recent inbox messages — returns sender, subject, date, messageId, folderId
search_emails	Search by keyword, sender email, or subject fragment
read_email	Read full email body given a messageId and folderId
send_email	Send an email from your configured sender address

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 "[email protected]" \
  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

Variable	Description
ZOHO_CLIENT_ID	OAuth app client ID
ZOHO_CLIENT_SECRET	OAuth app client secret
ZOHO_REFRESH_TOKEN	Long-lived refresh token (from step 2)
ZOHO_ACCOUNT_ID	Zoho Mail account ID (from step 3)
ZOHO_SENDER	Email address to send from

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