What is the accuracy of MailerCheck verification?

MailerCheck uses advanced multi-layer checks including syntax, DNS, and SMTP handshake to provide highly accurate results categorized into valid, risky, and invalid.

Can I verify large lists of emails?

Yes, use the `create_verification_batch` tool to upload a JSON array of email addresses. You can then monitor the progress and retrieve results once completed.

How do I check my remaining credits?

Use the `get_account_info` tool to retrieve your profile details and the current balance of verification credits in your account.

MailerCheck MCP Server for Cursor 5 tools — connect in under 2 minutes

Name: MailerCheck
Availability: InStock
Author: Vinkius

docs.cursor.com/context/model-context-protocol

Built by Vinkius GDPR 5 Tools IDE

Cursor is an AI-first code editor built on VS Code that integrates LLM-powered coding assistance directly into the development workflow. Its Agent mode enables autonomous multi-step coding tasks, and MCP support lets agents access external data sources and APIs during code generation.

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Classic Setup·json

{
  "mcpServers": {
    "mailercheck": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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About MailerCheck MCP Server

Connect your MailerCheck account to any AI agent to automate your email hygiene and deliverability workflows. This MCP server enables your agent to verify single email addresses instantly, manage batch verification lists, and monitor your account credits directly from natural language interfaces.

Cursor's Agent mode turns MailerCheck into an in-editor superpower. Ask Cursor to generate code using live data from MailerCheck and it fetches, processes, and writes. all in a single agentic loop. 5 tools appear alongside file editing and terminal access, creating a unified development environment grounded in real-time information.

What you can do

Real-time Verification — Instantly check if an email address is valid, risky, or invalid before sending
Batch Processing — Upload large lists of emails for asynchronous validation and track their progress
Results Ingestion — Retrieve detailed status reports for completed batches, including reason codes for invalid emails
History Oversight — List all recent verification batches and retrieve their technical metadata
Account Auditing — Monitor your authenticated user details and remaining verification credits

The MailerCheck MCP Server exposes 5 tools through the Vinkius. Connect it to Cursor in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect MailerCheck to Cursor via MCP

Follow these steps to integrate the MailerCheck MCP Server with Cursor.

Open MCP Settings

Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"

Add the server config

Paste the JSON configuration above into the mcp.json file that opens

Save the file

Cursor will automatically detect the new MCP server

Start using MailerCheck

Open Agent mode in chat and ask: "Using MailerCheck, help me...". 5 tools available

Why Use Cursor with the MailerCheck MCP Server

Cursor AI Code Editor provides unique advantages when paired with MailerCheck through the Model Context Protocol.

Agent mode turns Cursor into an autonomous coding assistant that can read files, run commands, and call MCP tools without switching context

Cursor's Composer feature can generate entire files using real-time data fetched through MCP. no copy-pasting from external dashboards

MCP tools appear alongside built-in tools like file reading and terminal access, creating a unified agentic environment

VS Code extension compatibility means your existing workflow, keybindings, and extensions all work alongside MCP tools

MailerCheck + Cursor Use Cases

Practical scenarios where Cursor combined with the MailerCheck MCP Server delivers measurable value.

Code generation with live data: ask Cursor to generate a security report module using live DNS and subdomain data fetched through MCP

Automated documentation: have Cursor query your API's tool schemas and generate TypeScript interfaces or OpenAPI specs automatically

Infrastructure-as-code: Cursor can fetch domain configurations and generate corresponding Terraform or CloudFormation templates

Test scaffolding: ask Cursor to pull real API responses via MCP and generate unit test fixtures from actual data

MailerCheck MCP Tools for Cursor (5)

These 5 tools become available when you connect MailerCheck to Cursor via MCP:

create_verification_batch

Requires a name and a list of emails. Upload a list of emails for batch verification

get_account_info

Get account details and credit balance

get_batch_results

Retrieve the results for a specific batch

list_verification_batches

List all recent verification batches

verify_single_email

Requires an email string. Verify a single email address in real-time

Example Prompts for MailerCheck in Cursor

Ready-to-use prompts you can give your Cursor agent to start working with MailerCheck immediately.

"Verify the email address 'user@example.com' in MailerCheck."

"List all my recent verification batches."

"Show valid emails for batch ID '123'."

Troubleshooting MailerCheck MCP Server with Cursor

Common issues when connecting MailerCheck to Cursor through the Vinkius, and how to resolve them.

Tools not appearing in Cursor

Ensure you are in Agent mode (not Ask mode). MCP tools only work in Agent mode.

Server shows as disconnected

Check Settings → Features → MCP and verify the server status. Try clicking the refresh button.

MailerCheck + Cursor FAQ

Common questions about integrating MailerCheck MCP Server with Cursor.

What is Agent mode and why does it matter for MCP?

Agent mode is Cursor's autonomous execution mode where the AI can perform multi-step tasks: reading files, editing code, running terminal commands, and calling MCP tools. Without Agent mode, Cursor operates in a simpler ask-and-answer mode that doesn't support tool calling. Always ensure you're in Agent mode when working with MCP servers.

Where does Cursor store MCP configuration?

Cursor looks for MCP server configurations in a mcp.json file. You can configure servers at the project level (.cursor/mcp.json in your project root) or globally (~/.cursor/mcp.json). Project-level configs take precedence.

Can Cursor use MCP tools in inline edits?

No. MCP tools are only available in Agent mode through the chat panel. Inline completions and Tab suggestions do not trigger MCP tool calls. This is by design. tool calls require user visibility and approval.

How do I verify MCP tools are loaded?

Open Settings → Features → MCP and look for your server name. A green indicator means the server is connected. You can also check Agent mode's available tools by clicking the tools dropdown in the chat panel.