What is the key difference between 19hz and Postmark?

19hz belongs to the Developer Tools category with local stdio execution, while Postmark belongs to the Developer Tools category with cloud HTTP/SSE execution.

How do I install 19hz or Postmark 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 19hz and Postmark free or paid?

19hz operates under a Free / Open Source model (No auth required). Postmark operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

19hz lists 0 tools with 2 views and 0 GitHub stars. Postmark lists 0 tools with 0 views and 0 GitHub stars.

Can I use both 19hz and Postmark 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

19hz vs Postmark

In-depth architectural comparison of the 19hz and Postmark 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

19hz

Developer Tools · Local stdio

Quality: 21/100 (Emerging) | Auth: No auth required

Postmark

Developer Tools · Remote HTTP/SSE

Quality: 33/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose 19hz if you need specialized Developer Tools tools running via a local process. Choose Postmark if your workspace requires Developer Tools integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose 19hz when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore 19hz Details

Choose Postmark when:

You need dedicated capabilities in the Developer Tools domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Postmark Details

Feature & Specification Comparison

Specification	1 19hz Developer Tools	P Postmark Developer Tools
Summary	19hz.info MCP.	Postmark MCP.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

19hz Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Postmark Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

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).

19hz Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "19hz": {
      "command": "npx",
      "args": [
        "-y",
        "19hz"
      ]
    }
  }
}

Postmark Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "postmark": {
      "url": "https://postmarkapp.com/developer"
    }
  }
}

Frequently Asked Questions

19hz is categorized under Developer Tools and uses a local stdio subprocess. In contrast, Postmark belongs to Developer Tools using remote streaming HTTP/SSE transport. Select 19hz when you need capabilities focused on developer tools and Postmark when you require tools for developer tools.

More alternatives to 19hz More alternatives to Postmark Developer Tools category hub