What is the key difference between Atmark and Clawaimail MCP?

Atmark belongs to the Communication category with cloud HTTP/SSE execution, while Clawaimail MCP belongs to the Communication category with local stdio execution.

How do I install Atmark or Clawaimail MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Atmark and Clawaimail MCP free or paid?

Atmark operates under a Free / Open Source model (No auth required). Clawaimail MCP operates under a Freemium model (API Key required).

Which MCP server has more tools and community activity?

Atmark lists 22 tools with 0 views and 0 GitHub stars. Clawaimail MCP lists 9 tools with 3 views and 2 GitHub stars.

Can I use both Atmark and Clawaimail MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Atmark vs Clawaimail MCP

In-depth architectural comparison of the Atmark and Clawaimail MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Atmark

Communication · Remote HTTP/SSE

Quality: 52/100 (Good) | Auth: No auth required

Clawaimail MCP

Communication · Local stdio

Quality: 57/100 (Good) | Auth: API Key required

Verdict Summary: Choose Atmark if you need specialized Communication tools running via a hosted cloud SSE transport. Choose Clawaimail MCP if your workspace requires Communication integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Atmark when:

You need dedicated capabilities in the Communication domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: ATMARK_AGENT_TOKEN.
Primary tools included: get_capabilities, get_my_policy, request_policy_change.

Explore Atmark Details

Choose Clawaimail MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Freemium).
You have access to required keys: CLAWAIMAIL_API_KEY.
Primary tools included: list_inboxes, create_inbox, send_email.

Explore Clawaimail MCP Details

Feature & Specification Comparison

Specification	A Atmark Communication	Clawaimail MCP clawaimail Communication
Summary	Email for AI agents: its own address, not your Gmail. Invite-only; requires an agent token.	Email infrastructure for AI agents. Create inboxes on the fly, send and receive real emails, search messages, and manage threads via API. Install with npx clawaimail-mcp.
Category & Scope	Communication	Communication

Tools & Capabilities Breakdown

Atmark Tools (22)

get_capabilities

Read this first: addresses, scopes, policy summary, and how the rest works

get_my_policy

Its own policy, limits, and default sending address

request_policy_change

Asks the owner for one policy change (an allow/block list entry or a mode), with a reason; applies only after the owner approves

get_policy_request

The result of a policy change request

send_email

Sends a new email

reply_email

Replies to a received email

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Atmark Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "atmark": {
      "url": "https://api.atmark.ai/mcp"
    }
  }
}

Clawaimail MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "clawaimail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "clawaimail-mcp"
      ],
      "env": {
        "CLAWAIMAIL_API_KEY": "YOUR_CLAWAIMAIL_API_KEY_HERE"
      }
    }
  }
}

Frequently Asked Questions

Atmark is categorized under Communication and uses a remote streaming HTTP/SSE transport. In contrast, Clawaimail MCP belongs to Communication using local stdio subprocess. Select Atmark when you need capabilities focused on communication and Clawaimail MCP when you require tools for communication.

More alternatives to Atmark More alternatives to Clawaimail MCP Communication category hub