MailerCheck Connector for AI agents.
5 live capabilities
Verify lead emails and clean contact lists to protect your sender reputation.
Waiting for input…
Why people use MailerCheck
Stop losing deliverability with MailerCheck email validation
This Connector changes that. You just tell your agent to run your list through MailerCheck. It handles the heavy lifting, identifies the risktopes, and gives you a clean list in seconds. You get to focus on the actual outreach instead of babysitting a spreadsheet.
What Vinkius changes
You get a clean, verified list ready for outreach without ever leaving your AI chat interface.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 5,900+ Connectors
- Real-world use case 01
Cleaning a stale CRM database
A marketing manager asks their agent to scrub a list of 5,000 old subscribers to identify which ones are still active before sending a newsletter.
- Real-world use case 02
Real-time lead verification
An SDR gets a new lead from a web form and asks their agent to check if the email is valid before they add it to their personal outreach sequence.
- Real-world use case 03
Bulk webinar list validation
A growth team uploads a list of 1,000 webinar attendees to check for valid addresses to ensure high deliverability for the follow-up campaign.
Complete set · 5capabilities
The complete MailerCheck capability set.
These are the exact actions your AI can choose when you ask it to work with MailerCheck.
01—03
3 capabilities in this set.
Part of 5 available through MailerCheck.
- 01 Capability
List verification batches
See a list of your recent batch jobs. Use this to find specific IDs for jobs you started earlier.
- 02 Capability
Create verification batch
Upload a list of emails for bulk checking. This handles the heavy lifting for large datasets.
- 03 Capability
Verify single email
Check one email address immediately. It's perfect for real-time verification during a conversation.
04—05
2 capabilities in this set.
Part of 5 available through MailerCheck.
- 04 Capability
Get account info
See your current account status and balance. Use this to keep track of your remaining credits.
- 05 Capability
Get batch results
Pull the final report for a specific batch. This shows you exactly which emails passed or failed.
Set up in minutes
One URL. Then ask MailerCheck to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use MailerCheck from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_bReO4JgixfNfr2miQG0Lc9UB76MtllaR3Xy06Fz5/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it MailerCheck, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable MailerCheck for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_bReO4JgixfNfr2miQG0Lc9UB76MtllaR3Xy06Fz5/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the MailerCheck URL.
- Step 03
Save and start
Save the connection and enable MailerCheck in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"mailercheck": {
"url": "https://edge.vinkius.com/vk_preview_bReO4JgixfNfr2miQG0Lc9UB76MtllaR3Xy06Fz5/mcp"
}
}
} - Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using MailerCheck
Open Agent mode in chat and ask: "Using MailerCheck, help me...". 5 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"mailercheck": {
"url": "https://edge.vinkius.com/vk_preview_bReO4JgixfNfr2miQG0Lc9UB76MtllaR3Xy06Fz5/mcp"
}
}
} - Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using MailerCheck
Ask Copilot: "Using MailerCheck, help me...". 5 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"mailercheck": {
"url": "https://edge.vinkius.com/vk_preview_bReO4JgixfNfr2miQG0Lc9UB76MtllaR3Xy06Fz5/mcp"
}
}
} - Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using MailerCheck
Open Cascade and ask: "Using MailerCheck, help me...". 5 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"mailercheck": {
"url": "https://edge.vinkius.com/vk_preview_bReO4JgixfNfr2miQG0Lc9UB76MtllaR3Xy06Fz5/mcp"
}
}
} - Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using MailerCheck
Ask Cline: "Using MailerCheck, help me...". 5 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add mailercheck --transport http "https://edge.vinkius.com/vk_preview_bReO4JgixfNfr2miQG0Lc9UB76MtllaR3Xy06Fz5/mcp" - Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using MailerCheck
Ask Claude: "Using MailerCheck, show me...". 5 tools are ready
Where the request belongs
Work MailerCheck can move forward.
The growth marketer who's tired of watching their open rates tank because of hard bounces. It's for anyone who handles high-volume outbound email and needs to protect their domain reputation.
Email Marketer
Cleaning out old CRM lists before a big blast to keep the sender score healthy.
Sales Development Rep
Verifying a new lead list instantly before starting a personalized outreach sequence.
Growth Engineer
Automating the validation step in a lead generation pipeline to ensure data quality.
Build the capability set
Add more capabilities.
Each Connector adds new actions and data without changing how you work.
Browse ConnectorsKickbox
Verify email addresses in real-time or in bulk to improve deliverability and protect your sender reputation.
Listclean
Verify and validate email addresses in real-time or batch via the Listclean API.
No2Bounce
Validate email addresses in bulk to reduce bounce rates and protect your sender reputation directly from your AI agent.
Clearout.io
Verify email addresses and deliverability via Clearout. track validation jobs, monitor credit balance, and audit list health directly from any AI agent.
Clearout
Verify email addresses in bulk before sending campaigns to protect your sender reputation and improve deliverability rates.
ZeroBounce
Validate email addresses, check activity data, and improve deliverability using ZeroBounce's real-time verification and AI scoring capabilities.
Bring your own AI
Change the model, client or framework. Keep MailerCheck connected.
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Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
Windsurf -
ZCode -
Cline -
Zed -
Continue -
Kiro -
Roo Code -
Zencoder -
Goose -
Void -
Augment Code -
Amp -
Qodo -
Tabnine -
Pieces -
Sourcegraph Cody -
JetBrains -
Warp -
Amazon Q -
Antigravity -
BoltAI -
Raycast -
Jan -
LM Studio -
AnythingLLM -
Open WebUI -
Msty -
Cherry Studio -
LibreChat -
TypingMind -
Chorus -
5ire -
n8n -
LangChain -
LlamaIndex -
CrewAI -
Vercel AI SDK
Before you connect
Questions about MailerCheck.
The practical details behind the request, access and result.
How does MailerCheck MCP improve my email deliverability?
It prevents your emails from bouncing by identifying invalid or risky addresses before you send your campaign. By ensuring only clean data reaches your list, you protect your sender reputation and improve your open rates.
Can I verify large lists of emails using this Connector?
Yes, you can upload large lists for bulk processing. The Connector handles these in the background, allowing you to verify thousands of leads at once rather than one by one.
What happens if an email is marked as risky?
A risky status means the email is reachable but might have a high chance of landing in spam or being ignored. It's best to review these before sending high-priority outreach.
How do I see my remaining credits?
You can simply ask your agent to check your account status. It will pull your current balance and verification credits directly from your MailerCheck account.
Can this Connector help me clean my existing CRM list?
Absolutely. You can dump your entire CRM export into a batch to identify dead leads. This helps you prune your list and focus your marketing efforts on active users.
Is it better to verify emails one by one or in batches?
It depends on your goal. Use single verification for real-time checks during a conversation. Use batch verification for cleaning large databases or preparing new outreach lists.
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 capability 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 capability to retrieve your profile details and the current balance of verification credits in your account.
One connection away
Give your agent a direct line to MailerCheck.
Connect MailerCheck once. Keep it beside 5,900+ managed Connectors when the next task needs more.
Explore every Connector No credit card required · Free tier available