Server data from the Official MCP Registry
Email verification for AI agents: check addresses and lists, priced before credits are spent.
About
Email verification for AI agents: check addresses and lists, priced before credits are spent.
Remote endpoints: streamable-http: https://listcheckup.com/mcp
Security Report
Valid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry.
Endpoint verified · Requires authentication · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Found in Source Code
Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.
How to Connect
Remote Plugin
No local installation needed. Your AI client connects to the remote endpoint directly.
Add this to your MCP configuration to connect:
{
"mcpServers": {
"com-listcheckup-mcp": {
"url": "https://listcheckup.com/mcp"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
ListCheckup MCP server
Email verification for AI assistants. Connect Claude, Cursor or any MCP client to ListCheckup and let it check a single address or a whole list, showing you the price before anything is spent.
- Endpoint:
https://listcheckup.com/mcp(remote, Streamable HTTP) - Auth:
Authorization: Bearer lck_live_...(create a key in your ListCheckup dashboard) - Free tier: 100 checks every month, no card. Catch-all and unknown results are not charged, and credits never expire.
- Data: processed on EU servers. Nothing is sent to the addresses being checked.
Tools
| Tool | What it does | Cost |
|---|---|---|
check_email | Verify one address: valid, invalid, risky, catch-all or unknown, with the reason and a confidence score | 1 credit (free if catch-all or unknown) |
get_balance | Credits left on the account | Free |
create_list | Submit a list and get its price | Free |
start_list | Start checking a list you've priced | Spends credits |
get_list | Status and progress of a list | Free |
get_list_summary | Counts by status once a list is finished | Free |
Pricing and starting are separate tools on purpose: an assistant has to show you what a list will cost before anything is spent, and you can say no. No tool takes an account as an argument; the key in the header decides whose credits are used.
Connect
Claude Code
claude mcp add --transport http listcheckup https://listcheckup.com/mcp \
--header "Authorization: Bearer lck_live_..."
Claude Desktop, Cursor and most other clients
{
"mcpServers": {
"listcheckup": {
"url": "https://listcheckup.com/mcp",
"headers": { "Authorization": "Bearer lck_live_..." }
}
}
}
Check it works
curl -X POST "https://listcheckup.com/mcp" \
-H "Authorization: Bearer lck_live_..." \
-H "Content-Type: application/json" \
-H "Accept: application/json, text/event-stream" \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'
Six tools listed means you're connected.
Example prompts
- "Check whether anna@example.com is a real address."
- "Here's my leads CSV. How much would it cost to verify it? Don't start until I say so."
- "How many credits do I have left?"
Treat the key as a password
Anything holding it can spend your credits. Keep config files with the key out of shared repositories, give each machine its own key, and revoke a key in the dashboard if it leaks. Revoking takes effect immediately.
Links
- REST API docs: https://listcheckup.com/api
- Verify emails in n8n: https://listcheckup.com/n8n-email-verification/
- Free email domain checker (MX, SPF, DMARC): https://listcheckup.com/email-domain-checker/
ListCheckup checks addresses you already hold. Purchased, rented or scraped lists aren't allowed under the acceptable use policy.
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