Atomic Mail MCP Server: Install & Setup

Install Atomic Mail in Claude Code

Remote URL

Claude Code

claude mcp add --transport http atomic-mail https://mcp.atomicmail.ai/mcp

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

{
  "mcpServers": {
    "atomic-mail": {
      "url": "https://mcp.atomicmail.ai/mcp"
    }
  }
}

npm

Claude Code

claude mcp add atomic-mail -- npx -y @atomicmail/mcp-modelcontextprotocol

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

{
  "mcpServers": {
    "atomic-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@atomicmail/mcp-modelcontextprotocol"
      ]
    }
  }
}

Frequently asked questions

What does the Atomic Mail MCP server do?

Email for AI agents: autonomous inbox registration via proof-of-work, custom domains, and sending and receiving over the open JMAP standard.

Is the Atomic Mail 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 Atomic Mail run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Atomic Mail to Claude Code?

Run: claude mcp add --transport http atomic-mail https://mcp.atomicmail.ai/mcp

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