MailFerret MCP

An official MCP server for MailFerret that enables AI agents to find and verify work emails using live SMTP checks. It supports tools to find emails by name and domain, verify specific email addresses, and gather domain intelligence. The server is operated directly by the MailFerret vendor and integrates with x402 payment protocols for API calls.

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 MailFerret

MCP endpoint (Streamable HTTP)

https://mailferret.appin60.com/mcp

Vendor documentation

What you can do with it

Find work email addresses by name and company domain
Verify if an email address is deliverable or undeliverable
Detect catch-all domains and identify email patterns
Gather domain intelligence including tech stack and socials

Tools advertised by the last live check:

find_work_email
verify_email
domain_email_intel

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 mailferret-mcp https://mailferret.appin60.com/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 mailferret-mcp --url https://mailferret.appin60.com/mcp

Cursor

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

Cursor configuration

{
  "mcpServers": {
    "mailferret-mcp": {
      "url": "https://mailferret.appin60.com/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": {
    "mailferret-mcp": {
      "type": "streamableHttp",
      "url": "https://mailferret.appin60.com/mcp",
      "disabled": false
    }
  }
}

VS Code

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

VS Code configuration

{
  "servers": {
    "mailferret-mcp": {
      "type": "http",
      "url": "https://mailferret.appin60.com/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 mailferret-mcp https://mailferret.appin60.com/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": {
    "mailferret-mcp": {
      "url": "https://mailferret.appin60.com/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": {
    "mailferret-mcp": {
      "serverUrl": "https://mailferret.appin60.com/mcp"
    }
  }
}

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