# MailboxValidator MCP

Vendor: MailboxValidator  
Category: other  
Auth: API_KEY  
Composio slug: `mailboxvalidator`

MailboxValidator checks email addresses for syntax, deliverability, mail-server availability, and free or disposable provider status.

## Tools

- **Check Disposable Email** — Check whether one email address uses a disposable email provider. Consumes one API credit.
- **Check Free Email** — Check whether one email address uses a free email provider. Consumes one API credit.
- **Validate Email** — Run comprehensive syntax, domain, mail-server, reputation, and provider checks on one email address. The status field is the overall validation verdict; an HTTP success alone does not mean the mailbox was verified. Consumes one API credit.

## Setup

1. Create or open a Switchy Project.
2. Open Integrations and connect MailboxValidator.
3. Authorise through api_key.
4. Teammates can now @-mention MailboxValidator tools in chat.

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Last verified: 2026-09-03T02:00:04.194Z  
Canonical URL: https://switchy.build/directory/mcps/mailboxvalidator