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MailStream

Official registry Other

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

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 mailstream 'https://my.mailstream.app/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mailstream": {
            "type": "http",
            "url": "https://my.mailstream.app/mcp"
        }
    }
}

Frequently asked questions

What is MailStream?

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

How do I install MailStream?

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

Does MailStream 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.

Who maintains MailStream?

It is published by app.mailstream. 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.