MX Probe MCP Server

by andrewchmrdev.mxprobe/mxprobev0.2.6

Email verification for AI agents. One call returns send, hold or kill with the reason. Free DNS tier runs locally; the hosted SMTP probe is 9 USD per 10,000 checks. CLI + MCP server.

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Active17d ago

Install MX Probe MCP server

claude mcp add cli-andrewchmr -e MXPROBE_API_KEY='<mxprobe-api-key>' -- npx -y mxprobe mcp

{
  "mcpServers": {
    "cli-andrewchmr": {
      "command": "npx",
      "args": [
        "-y",
        "mxprobe",
        "mcp"
      ],
      "env": {
        "MXPROBE_API_KEY": "<mxprobe-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "cli-andrewchmr": {
      "command": "npx",
      "args": [
        "-y",
        "mxprobe",
        "mcp"
      ],
      "env": {
        "MXPROBE_API_KEY": "<mxprobe-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "cli-andrewchmr": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mxprobe",
        "mcp"
      ],
      "env": {
        "MXPROBE_API_KEY": "<mxprobe-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "cli-andrewchmr": {
      "command": "npx",
      "args": [
        "-y",
        "mxprobe",
        "mcp"
      ],
      "env": {
        "MXPROBE_API_KEY": "<mxprobe-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
MXPROBE_API_KEY	—	yes	Hosted-tier API key from POST /v1/signup or the signup tool. Without it the verify tools run the free local DNS tier.

Freshness

Active — last maintenance signal 17d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-09-23 · 17d ago · GitHub
Latest release
2026-09-15 · 25d ago · GitHub · v0.2.5
Package published
no data · npm/PyPI
Registry entry updated
2026-09-23 · 17d ago · official registry · v0.2.6

FAQ

›How do I install the MX Probe MCP server in Claude Code?

Run: claude mcp add cli-andrewchmr -e MXPROBE_API_KEY='<mxprobe-api-key>' -- npx -y mxprobe mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does MX Probe require an API key?

Yes. It expects MXPROBE_API_KEY, of which 1 is a secret.

›Can I use MX Probe as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is MX Probe in the official MCP registry?

Yes, as dev.mxprobe/mxprobe.