What is the main functional difference between 4da MCP Server and Deliverability Doctor?

4da MCP Server is categorized under Security and uses a local stdio subprocess. Deliverability Doctor belongs to Security and uses an install path we have not confirmed yet. Pick 4da MCP Server for security work and Deliverability Doctor for security.

How do I install 4da MCP Server or Deliverability Doctor in Claude Desktop, Cursor, or Windsurf?

Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. Deliverability Doctor has no confirmed install command yet — follow its own setup instructions.

Are 4da MCP Server and Deliverability Doctor free to use, or do they require API keys?

4da MCP Server has no declared pricing — check the project's own site. Deliverability Doctor has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.

Can I run both 4da MCP Server and Deliverability Doctor at the same time in my AI client?

Yes. MCP clients support multiple servers: add 4da-mcp-server and deliverability-doctor as separate keys in the same mcpServers object, and your assistant will call tools from either one.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, 4da MCP Server has a quality signal of 45/100 (Fair) with 2 views, 0 installs and 2 GitHub stars. Deliverability Doctor has 31/100 (Emerging) with 0 views, 0 installs and 0 GitHub stars.

4da MCP Server vs Deliverability Doctor

4da MCP Server vs Deliverability Doctor | AllMCPs

Feature & specification comparison

Rows where the two servers differ are marked.

Spec	4da MCP Server	Deliverability Doctor
Category	Security	Security
Quality signal	45/100 · Fair	31/100 · Emerging
Install command	Confirmed	Not confirmed yet
Transport	Local subprocess (stdio)	—
Auth	Not declared	Not declared
Pricing	Not declared	Not declared
Required env vars	None listed	None listed
Verified owner	Community listing	Community listing
GitHub stars	2	0
Directory activity	2 views 0 installs 0 upvotes	0 views 0 installs 0 upvotes
Tools	Not listed	Not listed
Full listing	View 4da MCP Server	View Deliverability Doctor

Ready-to-paste client configs

Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.

4da MCP Server

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "4da-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@4da/mcp-server"
      ]
    }
  }
}

Deliverability Doctor

No confirmed install command for Deliverability Doctor yet — follow the setup steps linked from its listing page rather than a guessed package name.

4da MCP Server vs Deliverability Doctor

Which MCP server should you choose?

Choose 4da MCP Server when

Choose Deliverability Doctor when

Feature & specification comparison

Tools & capabilities

4da MCP Server tools

Deliverability Doctor tools

Ready-to-paste client configs

4da MCP Server

Deliverability Doctor

Frequently asked questions

Choose 4da MCP Server when

Choose Deliverability Doctor when

4da MCP Server tools

Deliverability Doctor tools

4da MCP Server

Deliverability Doctor

Frequently asked questions

What is the main functional difference between 4da MCP Server and Deliverability Doctor?

How do I install 4da MCP Server or Deliverability Doctor in Claude Desktop, Cursor, or Windsurf?

Are 4da MCP Server and Deliverability Doctor free to use, or do they require API keys?

Can I run both 4da MCP Server and Deliverability Doctor at the same time in my AI client?

Which MCP server has higher directory engagement and quality ratings?

Popular comparisons with 4da MCP Server

Popular comparisons with Deliverability Doctor