What is the MyEmailVerifier MCP Connector?

The MyEmailVerifier MCP Connector lets you connect Claude to real-time email verification using the Model Context Protocol. You can verify single emails or batches of up to 10 addresses and check your credit balance directly inside Claude without leaving your workflow.

How do I connect MyEmailVerifier to Claude?

In Claude, open Settings → Connectors → Add custom connector, paste the connector URL https://mcp.myemailverifier.com/mcp, click Add, then click Connect, enter your MyEmailVerifier API key, and click Authorize & Connect.

Is my API key safe with the MCP Connector?

Yes. The connector uses OAuth 2.1 with PKCE, dynamic client registration and rotating refresh tokens. Your API key is never written to disk or stored in a database - it is encrypted inside the access token itself. Access tokens last 1 hour, with a 30-day refresh token that is rotated on every use. All traffic is encrypted via TLS.

What email verification features does the MCP Connector support?

The MCP Connector exposes three read-only tools: single email verification (verify_email), batch verification of up to 10 emails (verify_email_batch), and credit balance lookup (get_credit_balance, which is free and uses no credits). The verification tools run syntax, domain, MX and live SMTP mailbox checks and report disposable, role-based, catch-all, free-provider and greylisting flags.

What are the rate limits for the MCP Connector?

MCP tool calls are limited to 120 requests per minute. Authorization endpoints are limited to 20 requests per 15 minutes. The connector uses MCP protocol version 2025-06-18 and also supports 2025-03-26 and 2024-11-05.

MyEmailVerifier MCP Connector — Claude.ai Email Verification Integration

What's Included

Features

Three read-only tools for reliable email verification, directly inside Claude.

🔍

Single Email Verification

Syntax, domain, MX and live SMTP mailbox checks, plus disposable, role-based, catch-all, free-provider and greylisting flags.

📋

Batch Verification

Verify up to 10 email addresses in a single tool call, with a per-address verdict and a summary of how many are safe to send to.

💳

Credit Balance

Ask Claude how many verification credits remain on your account at any time. This tool is free and uses no credits.

🔐

OAuth 2.1 with PKCE

Dynamic client registration and rotating refresh tokens. Claude uses your own API key — no shared credentials, no key exposure.

Getting Started

Setting it up

Add the connector in five simple steps — no coding required.

1

Open Claude Settings

In Claude, open Settings → Connectors → Add custom connector

2

Enter the Connector URL

Paste https://mcp.myemailverifier.com/mcp and click Add

3

Click "Connect"

You will be taken to a MyEmailVerifier authorization page.

4

Enter Your API Key

Enter the API key from your dashboard.

5

Authorize & Connect

Click Authorize & Connect. Claude now has access to the email verification tools.

🔑 Your API key is validated against your account in real time, encrypted into the access token, and never written to disk or a database.

✅ No credit card required. Sign up for a free account at myemailverifier.com to get free verification credits instantly.

API Reference

Available Tools

Three MCP tools are exposed to Claude once the connector is authorized. All three are read-only — none of them modify or delete anything in your account.

verify_email Verify a single email address — uses 1 credit

Input

{
  "email": "[email protected]"
}

Example Output

## Email Verification Result Email: [email protected] Status: ✅ Valid Safe to Send: ✅ Yes Diagnosis: Mailbox exists and is active. Safe to send. ### Details - Disposable Domain: ✅ No - Catch-All: ✅ No - Role Based: ✅ No - Free Provider: No - Greylisted: ✅ No

verify_email_batch Verify up to 10 addresses in one call — uses 1 credit per address

Input

{
  "emails": [
    "[email protected]",
    "[email protected]",
    "invalid@fake"
  ]
}

Returns a per-address verdict in the same detailed format as verify_email, plus a summary of how many are safe to send to.

get_credit_balance Check remaining credits — free, uses no credits

Check how many verification credits remain on your account. Takes no input parameters.

Example Output

## Credit Balance Credits remaining: 8,450 Free — this tool uses no credits.

Usage Examples

Example Claude Prompts

Just type naturally — Claude knows when to call the verification tool.

💬

"Verify the email address [email protected]"

💬

"Which of these are safe to send marketing email to: [email protected], [email protected], [email protected]?"

💬

"How many verification credits do I have left?"

💬

"Check this list and tell me which ones are disposable addresses"

Security

Authentication

This connector uses OAuth 2.1 with PKCE (S256), dynamic client registration and rotating refresh tokens. Each user authenticates with their own MyEmailVerifier API key — the server never stores credentials permanently. Access tokens last 1 hour, alongside a 30-day refresh token that is rotated on every use.

Endpoint	URL	Purpose
Authorization	`https://mcp.myemailverifier.com/authorize`	Redirect user to login & consent
Token	`https://mcp.myemailverifier.com/token`	Exchange code for Bearer token
MCP	`https://mcp.myemailverifier.com/mcp`	Streamable HTTP — tool execution endpoint

ℹ️ The MCP endpoint accepts Streamable HTTP (POST) requests authenticated via OAuth 2.1 Bearer token. Protocol version: 2025-06-18 (also supports 2025-03-26 and 2024-11-05).

Specification

Technical Details

Every value below reflects the live server configuration.

Item	Value
Transport	MCP Streamable HTTP
Protocol version	`2025-06-18` (also supports `2025-03-26` and `2024-11-05`)
Authorization	OAuth 2.1 with PKCE (S256)
Client registration	Dynamic, RFC 7591
Discovery	RFC 9728 protected resource metadata, RFC 8414 server metadata
Access token	1 hour
Refresh token	30 days, rotated on every use
Rate limit — tools	120 requests per minute
Rate limit — authorization	20 requests per 15 minutes
Transport security	TLS throughout (Cloudflare + Apache)
Status	https://mcp.myemailverifier.com/health

Limits

Rate Limits

Limits are applied per IP address to ensure fair usage and service stability.

Endpoint	Limit	Window
MCP tool calls	120 requests	per minute
Authorization endpoints	20 requests	per 15 minutes

Privacy & Security

Your Data is Safe

Designed with privacy-first principles — no data retained beyond what is needed.

✅ Email addresses you verify are passed straight to the MyEmailVerifier API. This connector does not log, cache or retain them.
✅ Your API key is never written to disk or stored in a database — it is encrypted inside the access token itself.
✅ Server logs record only method, path, IP and user agent. Tokens, authorization codes and API keys are redacted.
✅ All traffic is encrypted via TLS (Cloudflare + server layer)
✅ Verification requests are processed via the MyEmailVerifier API only
✅ No third-party tracking or analytics on the MCP server

Security controls

🔒 Exact redirect-URI matching. Authorization codes can only be returned to a URI registered by that specific client, so the server cannot be used to redirect codes to a third party.
🔒 PKCE required. Every authorization code exchange must present a valid S256 verifier; the weaker plain method is rejected.
🔒 Single-use authorization codes. A code cannot be redeemed twice.
🔒 Rotating refresh tokens. A replayed refresh token is rejected.
🔒 Audience-bound tokens. Tokens carry the resource they were issued for (RFC 8707) and are validated on every request, so a token issued elsewhere cannot be replayed here.
🔒 Origin validation on every tool request, guarding against DNS-rebinding.

All verification data is subject to the MyEmailVerifier Privacy Policy.

Evaluation

Test Account

To evaluate the connector, sign up for a free account at myemailverifier.com — free accounts include verification credits with no credit card required.

📧 If you need a provisioned test account for review purposes, contact us at [email protected].

Help

Support

Reach out through any of the channels below.

📧

Email Support

[email protected]

🌐

Support Portal

myemailverifier.com/support

📚

Full Documentation

API Documentation

🔑

Dashboard & API Key

client.myemailverifier.com

📶

Service Status

mcp.myemailverifier.com/health

💳 Pricing. Verification credits are drawn from your existing MyEmailVerifier account balance. There is no additional charge for using the connector. Free accounts include starter credits with no credit card required — sign up at myemailverifier.com.