What is the key difference between Slack Mcp Server and WorldCitiSim eSIM?

Slack Mcp Server belongs to the Communication category with local stdio execution, while WorldCitiSim eSIM belongs to the Communication category with local stdio execution.

How do I install Slack Mcp Server or WorldCitiSim eSIM 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 Slack Mcp Server and WorldCitiSim eSIM free or paid?

Slack Mcp Server operates under a Free / Open Source model (other). WorldCitiSim eSIM operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Slack Mcp Server lists 7 tools with 1 views and 1,777 GitHub stars. WorldCitiSim eSIM lists 0 tools with 0 views and 0 GitHub stars.

Can I use both Slack Mcp Server and WorldCitiSim eSIM 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.

How do I install Slack Mcp Server or WorldCitiSim eSIM in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are Slack Mcp Server and WorldCitiSim eSIM free to use, or do they require API keys?

Slack Mcp Server is listed under a Free / Open Source model with other . WorldCitiSim eSIM operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both Slack Mcp Server and WorldCitiSim eSIM at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both korotovsky-slack-mcp-server and worldcitisim-esim as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, Slack Mcp Server has a Quality Score of 61 /100 ( Good ) with 1 views, 0 installs, and 1,777 GitHub stars. WorldCitiSim eSIM holds a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Slack Mcp Server vs WorldCitiSim eSIM

In-depth architectural comparison of the Slack Mcp Server and WorldCitiSim eSIM 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

Slack Mcp Server

Communication · Local stdio

Quality: 61/100 (Good) | Auth: other

WorldCitiSim eSIM

Communication · Local stdio

Quality: 27/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose Slack Mcp Server if you need specialized Communication tools running via a local process. Choose WorldCitiSim eSIM 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 Slack Mcp Server when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
You have access to required keys: SLACK_MCP_ADD_MESSAGE_TOOL.
Primary tools included: UserID, UserName, RealName.

Explore Slack Mcp Server Details

Choose WorldCitiSim eSIM when:

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

Explore WorldCitiSim eSIM Details

Feature & Specification Comparison

Specification	Slack Mcp Server korotovsky Communication	W WorldCitiSim eSIM Communication
Summary	The most powerful MCP server for Slack Workspaces.	Travel eSIMs for 193 countries. Stripe + Bitcoin checkout. QR by email in 30s. No API key.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

Slack Mcp Server Tools (7)

UserID

User ID (e.g., `U1234567890`)

UserName

Slack username

RealName

User's real name

DisplayName

User's display name

User's email address

Title

User's job title

DMChannelID

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).

Slack Mcp Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "korotovsky-slack-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/inspector"
      ],
      "env": {
        "SLACK_MCP_ADD_MESSAGE_TOOL": "YOUR_SLACK_MCP_ADD_MESSAGE_TOOL_HERE"
      }
    }
  }
}

WorldCitiSim eSIM Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "worldcitisim-esim": {
      "command": "npx",
      "args": [
        "-y",
        "worldcitisim-esim"
      ]
    }
  }
}

Frequently Asked Questions

Slack Mcp Server is categorized under Communication and uses a local stdio subprocess. In contrast, WorldCitiSim eSIM belongs to Communication using local stdio subprocess. Select Slack Mcp Server when you need capabilities focused on communication and WorldCitiSim eSIM when you require tools for communication.

More alternatives to Slack Mcp Server More alternatives to WorldCitiSim eSIM Communication category hub