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ListCheckup

Official registry Productivity

Email verification for AI agents: check addresses and lists, priced before credits are spent.

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http listcheckup 'https://listcheckup.com/mcp' --header 'Authorization: <Bearer followed by your ListCheckup API key (lck_live_...)>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "listcheckup": {
            "type": "http",
            "url": "https://listcheckup.com/mcp",
            "headers": {
                "Authorization": "<Bearer followed by your ListCheckup API key (lck_live_...)>"
            }
        }
    }
}

Frequently asked questions

What is ListCheckup?

Email verification for AI agents: check addresses and lists, priced before credits are spent.

How do I install ListCheckup?

It runs as a remote server. In Claude Code: claude mcp add --transport http listcheckup 'https://listcheckup.com/mcp' --header 'Authorization: <Bearer followed by your ListCheckup API key (lck_live_...)>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does ListCheckup need an API key?

Yes. It expects Authorization, which you set in its configuration.

Is ListCheckup open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains ListCheckup?

It is published by damiana-create. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.