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Sendsets

Official registry Productivity

Cold email API for AI agents: connect mailboxes, warm up, run campaigns and handle replies.

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 sendsets 'https://api.sendsetsapi.com/v1/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "sendsets": {
            "type": "http",
            "url": "https://api.sendsetsapi.com/v1/mcp"
        }
    }
}

Frequently asked questions

What is Sendsets?

Cold email API for AI agents: connect mailboxes, warm up, run campaigns and handle replies.

How do I install Sendsets?

It runs as a remote server. In Claude Code: claude mcp add --transport http sendsets 'https://api.sendsetsapi.com/v1/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Sendsets need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Sendsets open source?

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

Who maintains Sendsets?

It is published by AddisonHoff. 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.