MCP server

MailboxValidator

io.github.MailboxValidator/mcp-mailboxvalidator

Checked 26 Oct 2026, 08:31 UTC · Still published on its registry; checked against OSV.dev; never run by us

Email validation MCP server using the MailboxValidator API. It can validate email addresses.

Runs on your computer

Source

At a glance

Type: MCP server
Publisher: Not verified
Status: Runs on your computer
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code
Last checked: 26 Oct 2026, 08:31 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. It then runs the package on your computer with your permissions. For other apps, copy the setup below.

Claude Code

claude mcp add mcp-mailboxvalidator --env MAILBOXVALIDATOR_API_KEY=YOUR_VALUE -- npx -y mcp-mailboxvalidator@1.0.0

Claude Desktop

{"mcpServers":{"mcp-mailboxvalidator":{"command":"npx","args":["-y","mcp-mailboxvalidator@1.0.0"],"env":{"MAILBOXVALIDATOR_API_KEY":"YOUR_VALUE"}}}}

Codex (config.toml)

[mcp_servers.mcp-mailboxvalidator]
command = "npx"
args = ["-y","mcp-mailboxvalidator@1.0.0"]
env = { MAILBOXVALIDATOR_API_KEY = "YOUR_VALUE" }

Gemini CLI

{"mcpServers":{"mcp-mailboxvalidator":{"command":"npx","args":["-y","mcp-mailboxvalidator@1.0.0"],"env":{"MAILBOXVALIDATOR_API_KEY":"YOUR_VALUE"}}}}

Cursor

{"mcpServers":{"mcp-mailboxvalidator":{"command":"npx","args":["-y","mcp-mailboxvalidator@1.0.0"],"env":{"MAILBOXVALIDATOR_API_KEY":"YOUR_VALUE"}}}}

VS Code

{"servers":{"mcp-mailboxvalidator":{"type":"stdio","command":"npx","args":["-y","mcp-mailboxvalidator@1.0.0"],"env":{"MAILBOXVALIDATOR_API_KEY":"YOUR_VALUE"}}}}

Runs on your computer with your permissions: check the package and its source before installing. Replace YOUR_VALUE with your own MAILBOXVALIDATOR_API_KEY.

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