NoBounce Email Validation

Real-time single and bulk email validation checking RFC 5322 syntax, DNS MX records, 5,000+ disposable providers, role accounts, typo suggestions, and SMTP handshake.

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NoBounce Email Validation MCP Server (nobounce-mcp)

notprathap/nobounce-mcp MCP server

Official Model Context Protocol (MCP) server for NoBounce Email Validation & Bulk CSV Verification API.

Allows AI assistants (Claude Desktop, Cursor, Windsurf, Cline, etc.) to verify single email addresses and bulk email lists in real time:

  • RFC 5322 Syntax & Domain Check
  • DNS MX Record Lookup
  • 5,000+ Disposable / Temp-Mail Provider Detection
  • Role Account Detection (support@, admin@, sales@)
  • Typo Suggestion (gmial.com -> gmail.com)
  • Optional Deep SMTP Mailbox Handshake
  • Bulk Batch Validation (up to 1,000 emails per call with graceful partial-quota processing)

Get a Free API Key

Grab a free API key (100 free validations/month, no credit card required) at https://nobounceapi.com/register.

Tools Provided

  1. validate_email — Validate a single email address (email, optional smtp_check).
  2. validate_emails_bulk — Validate an array of up to 1,000 email addresses (emails, optional smtp_check).

Quickstart (Claude Desktop / Cursor / Windsurf)

Add to your claude_desktop_config.json or .cursor/mcp.json:

{
  "mcpServers": {
    "nobounce": {
      "command": "npx",
      "args": ["-y", "github:notprathap/nobounce-mcp"],
      "env": {
        "NOBOUNCE_API_KEY": "nb-your-api-key-here"
      }
    }
  }
}

License

MIT — https://nobounceapi.com