Email validation MCP server using the MailboxValidator API. It can validate email addresses.
Connect MailboxValidator to Claude, Cursor or any other MCP client and it stops being a tab you switch to. Email validation MCP server using the MailboxValidator API. It can validate email addresses. The mailboxvalidator mcp server is what makes that connection.
This is a simple Model Context Protocol (MCP) server implementation for MailboxValidator API. It will return validation result for an email address.
Installation goes through your MCP client rather than a global install: point it at npm on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
Configuration is passed through the environment: MAILBOXVALIDATOR_API_KEY, YOUR_API_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
This sits in the team communication group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. It is maintained by MailboxValidator; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against MailboxValidator's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
{
"mcpServers": {
"mailboxvalidator": {
"command": "npx",
"args": ["-y", "npm"],
"env": {
"MAILBOXVALIDATOR_API_KEY": "your-value",
"YOUR_API_KEY": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| MAILBOXVALIDATOR_API_KEY | Credential the server authenticates with. | Yes |
| YOUR_API_KEY | Credential the server authenticates with. | Yes |
Your assistant inside the workspace — read channels, search history, post messages and tame the noise.
Inbox intelligence — search, read, draft and send Gmail through your assistant with OAuth auto-setup.
Read and write Jira, Confluence, Bitbucket, JSM and Compass from your AI client — with your own permissions.
Read and send Telegram messages through your assistant — chats, channels and history via the client API.
Enables Discord bot integration with Model Context Protocol (MCP) compatible applications like Claude Desktop.
Exposes REST APIs defined by OpenAPI specifications as Model Context Protocol (MCP) tools, facilitating seamless integration into MCP-based workflows.