AI Agent Integration

Model Context Protocol (MCP) Setup

Equip AI Coding Agents with autonomous email risk intelligence and disposable mailbox detection capabilities.

Docs / MCP Server Guide

What is CheckSignup MCP?

The Model Context Protocol (MCP) allows AI models like Claude, Cursor, and autonomous AI agents to invoke CheckSignup validation tools directly during workflows.

⚡ 1-Click Remote MCP (Zero Install — No Node.js / Python):

For Cursor Remote MCP, TypingMind, LibreChat, and web agents — simply paste your authenticated URL:

REMOTE SERVER URL

https://api.checksignup.com/mcp?key=cs_live_your_api_key_here

Or for Server-Sent Events (SSE) streaming clients:

SSE ENDPOINT URL

https://api.checksignup.com/mcp/sse?key=cs_live_your_api_key_here

🖥️ Claude Desktop / Stdio MCP Configuration:

claude_desktop_config.json

{
  "mcpServers": {
    "checksignup": {
      "command": "npx",
      "args": [
        "-y",
        "@checksignup/mcp"
      ],
      "env": {
        "CHECKSIGNUP_API_KEY": "cs_live_your_api_key_here"
      }
    }
  }
}

Available MCP Tools:

validate_email: Validate email syntax, disposable status, and MX cluster.
check_email_risk: 0-100 risk score with action decision (allow/review/block).
suggest_typo_fix: Typo suggestions for misspelled popular domains.
check_domain_reputation: Classify disposable, free webmail, and forwarding services.
normalize_email: Canonical form for Gmail, Proton, and Outlook aliases.
check_syntax: Validate RFC 5322 compliance.