Reckon Email Verification MCP Server

@reckonapp

Basic information

About Reckon Email Verification MCP Server

Enterprise-grade, real-time email verification in a straightforward way. Prevent bounces by checking any email against format rules, DNS records, disposable address lists, catch-all detection, and live SMTP—and get back a structured result your agent can act on immediately.

#email #deliverability

Reckon Email Verification MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "reckon": {
      "url": "https://mcp.reckonapp.io/mcp",
      "headers": {
        "X-API-Key": "YOUR_API_KEY"
      }
    }
  }
}

Reckon Email Verification MCP Server tools

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Overview

What is Reckon Email Verification?

Reckon Email Verification is an MCP server that verifies email addresses in real-time directly from AI clients like Claude, ChatGPT, Cursor, or Windsurf. It is powered by Reckon and designed for users needing deliverability checks, format validation, domain info, and risk flagging.

How to use Reckon Email Verification?

Connect by adding the endpoint https://mcp.reckonapp.io/mcp in your MCP client's settings, then sign in with your Reckon account via OAuth when prompted. For clients without OAuth support (like Cursor), use an API key in the X-API-Key header within the client's MCP configuration file. Requires a Reckon account with an active subscription and a positive credit balance.

Key features of Reckon Email Verification

Real-time email verification via MCP-compatible AI clients
Returns deliverability status, format validity, and domain info
Risk flags for disposable, role-based, accept-all, and more
Each verify_email call consumes one credit
Built-in check_credits tool for balance inquiries
Supports OAuth and API key authentication

Use cases of Reckon Email Verification

Verify an email address directly within a conversation with Claude or ChatGPT
Screen leads or user sign-ups for invalid or risky email addresses
Audit mailing lists to reduce bounces and improve deliverability

Frequently asked questions

What is required to use Reckon Email Verification?

You need a Reckon account (comes with 25 free trial credits), an active subscription, and a credit balance above zero. Sandbox test email addresses are available cost-free.

How does authentication work?

Most MCP clients authenticate via OAuth—sign in with your Reckon account. For clients like Cursor that lack OAuth support, pass your API key via the `X-API-Key` header.

Where can I get an API key?

You can generate and manage API keys at app.reckonapp.io/api-keys.

What information does the verify_email tool return?

It returns the email address, status (valid/invalid), format validity, domain existence, accept-all flag, disposable flag, role-based flag, mailbox full flag, plus addressing flag, and domain metadata.

Are there any known limits or rate limits?

Each email verification consumes one credit, and you must maintain a positive balance. No other rate limits are documented in the README.

Comments

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