MailValid MCP

An official MCP server provided by MailValid that allows AI agents to verify email addresses for syntax, MX records, SMTP mailbox existence, and disposable/role-based detection. It supports single and bulk verification using the same credit system and accuracy engine as the REST API.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-19Operated by MailValid

MCP endpoint (Streamable HTTP)

https://mailvalid.io/mcp/

Vendor documentation

What you can do with it

Verify single email addresses for validity and deliverability
Bulk verify email lists to clean contact databases
Check for disposable, role-based, or catch-all email addresses
Integrate email validation directly into AI agent workflows

Tools advertised by the last live check:

verify_email
submit_bulk_verification
get_bulk_job
list_bulk_jobs
cancel_bulk_job
get_credit_balance

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http mailvalid-mcp https://mailvalid.io/mcp/

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add mailvalid-mcp --url https://mailvalid.io/mcp/

Cursor

Merge this server into .cursor/mcp.json in your project, then enable mailvalid-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "mailvalid-mcp": {
      "url": "https://mailvalid.io/mcp/"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "mailvalid-mcp": {
      "type": "streamableHttp",
      "url": "https://mailvalid.io/mcp/",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start mailvalid-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "mailvalid-mcp": {
      "type": "http",
      "url": "https://mailvalid.io/mcp/"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http mailvalid-mcp https://mailvalid.io/mcp/

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "mailvalid-mcp": {
      "url": "https://mailvalid.io/mcp/"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "mailvalid-mcp": {
      "serverUrl": "https://mailvalid.io/mcp/"
    }
  }
}

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