MailStream MCP Server: Install & Setup

Install MailStream in Claude Code

Claude Code

claude mcp add --transport http mailstream https://my.mailstream.app/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "mailstream": {
      "url": "https://my.mailstream.app/mcp"
    }
  }
}

Frequently asked questions

What does the MailStream MCP server do?

The first MCP server for physical mail: send postcards and letters, manage lists and campaigns.

Is the MailStream MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does MailStream run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add MailStream to Claude Code?

Run: claude mcp add --transport http mailstream https://my.mailstream.app/mcp

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