Vinkius

MailerCheck MCP. Stop sending emails to dead addresses.

MailerCheck validates email addresses in real-time or processes entire lists of contacts for deliverability testing. It helps marketing teams ensure high sender reputation by instantly checking if an address is valid, risky, or outright fake. Whether you're running a campaign or cleaning up old CRM data, this MCP guarantees your outreach efforts hit real people, minimizing costly bounce rates and maximizing engagement.

MailerCheck MCP is compatible with Claude Claude
MailerCheck MCP is compatible with ChatGPT ChatGPT
MailerCheck MCP is compatible with Cursor Cursor
MailerCheck MCP is compatible with Gemini Gemini
MailerCheck MCP is compatible with Windsurf Windsurf
MailerCheck MCP is compatible with VS Code VS Code
MailerCheck MCP is compatible with JetBrains JetBrains
MailerCheck MCP is compatible with Vercel Vercel
See Vinkius in Action

Give Claude and any AI agent real-world access

Check a single email address

Instantly determines if an individual email is valid or problematic.

Validate large lists of emails

Uploads multiple email addresses to run comprehensive, background checks on the entire group.

Track batch progress and results

Retrieves detailed status reports for any verification job you've submitted, including failure reasons.

Monitor account usage

Provides current details on your account standing and remaining credit balance.

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AI Agent
MailerCheck

What AI agents can do with MailerCheck: 5 Tools

These five tools allow your agent to manage the entire lifecycle of email validation, from checking a single address to processing massive batch lists.

Make your AI actually useful.

Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.

Start using MailerCheck MCP

Get Account Info

Retrieves current account details and your remaining verification credit balance.

Get Batch Results

Fetches the comprehensive outcomes for a specific, completed batch job ID.

List Verification Batches

Lists all recent email verification jobs you've run and their corresponding IDs.

Create Verification Batch

Accepts a list of emails to process them asynchronously for large-scale validation.

Verify Single Email

Performs an instant, real-time check on just one email address string.

Security and governance baked right in.

Pick your AI client below to get set up. Just create a Vinkius account, subscribe, and you're instantly up and running. We handle the entire backend infrastructure, delivering out-of-the-box support for HTTPS Streamable, SSE, and OAuth2—zero messy routing required.

MailerCheck MCP is compatible with Claude

Claude AI

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.

2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL:

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.

3

Start a conversation

Open a new chat. The MailerCheck integration is available immediately — no restart needed.

Choose How to Get Started

Build a custom MCP for your own tools, or connect a ready-made integration from our catalog.

Build Your Own

Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.

  • Import from OpenAPI, Swagger, or YAML specs
  • Create Agent Skills with progressive disclosure
  • Deploy to edge with MCPFusion framework
  • Built in DLP, auth, and compliance on each call
  • Real time usage dashboard and cost metering
  • Publish to catalog or keep private
Start building

Make Your AI Do More

Start with MailerCheck, then connect any of our 5,200+ other servers whenever your AI needs more. One click, no limits.

  • Use this MCP plus 5,200+ others, all in one place
  • Add new capabilities to your AI anytime you want
  • Connections are secured and governed automatically
  • Track usage and costs across all your servers
  • Works with Claude, ChatGPT, Cursor, and more
  • New servers added to the catalog weekly
MailerCheck MCP server cover

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by MailerCheck. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

VINKIUS CLOUD

Cloud Hosted

Managed infra

V8 Isolated

Sandboxed per request

Zero-Trust Proxy

No stored credentials

DLP Enforced

Policy on each call

GDPR Compliant

EU data residency

Token Compression

~60% cost reduction

Your data is protected. See how we built it.

The mess of dirty contact lists

Right now, when your sales team gets a new list of leads, they often have to pause everything and manually copy emails into an external validator. They run the tool, download the CSV, open it in Excel, and then try to paste the validated data back into their CRM. It's slow, tedious work that introduces friction at every step.

With this MCP, your agent handles all of that overhead. Instead of multiple manual steps involving copying, pasting, and downloading files, you simply ask your agent: 'Validate these 10,000 emails.' The job is done in the background, and the final clean dataset appears directly for use.

MailerCheck: Instant Deliverability Confidence

The manual steps that go away are the entire cycle of 'check-download-open-filter-reupload.' You don't have to leave your primary workflow or context switching between multiple platforms just to clean data.

What changes now is confidence. When you send an email, you know it's going to a real mailbox. That single capability makes the whole outreach process faster and dramatically more reliable.

What MailerCheck MCP does for your AI

You can connect this MCP to any AI agent and make sure every email address in your contact lists actually works before sending anything out. It handles two types of checks: instant verification for single addresses, or processing massive batches of emails all at once. If you’re building an automated outreach system, you use it to upload a list and then track the progress until you get detailed reports showing exactly which addresses failed and why.

You can even check your account credits anytime just by asking. This functionality integrates smoothly into any workflow; connecting through Vinkius gives you access to this powerful validation tool alongside thousands of others, letting your agent handle all your data hygiene needs from one place.

Built · Hosted · Managed by Vinkius MailerCheck - Verify Email Addresses for Deliverability
Server ID 019d75cc-7a4f-72d2-93ef-29153faff929
Vinkius Inspector
Compliance Grade A+
Score 100/100
Vinkius Inspector Badge — Score 100/100

Frequently asked questions about MailerCheck MCP

How do I check one email address with MailerCheck? +

You use the verify_single_email tool. Just ask your agent to verify a specific email, and it gives you an immediate status update on validity.

Can I validate 10,000 emails using MailerCheck? +

Yes, use the create_verification_batch tool. This is designed for bulk processing; upload your list and let the system handle the validation asynchronously.

Where do I find out why an email failed with MailerCheck? +

After a batch job completes, use get_batch_results. This tool provides detailed reason codes for every failure, so you know exactly what needs fixing in your source data.

How do I check my remaining credits with MailerCheck? +

Run the get_account_info function. It immediately gives you an overview of your account details and how many verification credits you have left to spend.