When to Use

Use this tool when you need to checks if a given email is likely to bounce using a waterfall of strategies. works for catch-all email addresses, which are increasingly common yet hard for other apis to validate.. This is part of the Fiber AI API provider on xpay✦.

MCP Connection

Connect to xpay✦ to access this tool (and 16+ others):

{
  "mcpServers": {
    "xpay": {
      "url": "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"
    }
  }
}

For Claude Code:

claude mcp add --transport http xpay "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"

How to Execute

Use the xpay✦ meta-tools to run this tool:

1. xpay_details — Get full input schema: xpay_details("fiber/fiber_validate_a_single_email")
2. xpay_run — Execute: xpay_run("fiber/fiber_validate_a_single_email", { ...inputs })

Input Parameters

Pricing

• Cost: $0.04/call
• Balance check: Use xpay_balance to check remaining credits
• Get your API key at xpay.tools — $5 free credits included

Related Skills

• Fiber AI API (all tools) — 17 tools
• Fiber Search Companies From Text — $1.08/call
• Fiber Find Person By Email — $0.08/call
• Fiber Kitchen Sink Company Lookup — $0.02/call
• Fiber Fetch Linkedin Profile Posts — $0.08/call
• Fiber Fetch Linkedin Post Comments — $0.08/call

Links

• Tool page: https://xpay.tools/fiber/fiber-validate-a-single-email/
• Provider: https://xpay.tools/fiber/
• All tools: https://xpay.tools/explore