Slack MCP Server vs Viber MCP

In-depth architectural comparison of the Slack MCP Server and Viber 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.

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 Viber MCP 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).
• Primary tools included: send_message, send_picture, send_video.

Explore Viber MCP Details

Feature & Specification Comparison

Specification	Slack MCP Server korotovsky Communication	Viber MCP serhiizghama Communication
Summary	The most powerful MCP server for Slack Workspaces.	MCP server for the Viber Bot REST API. Send text, pictures, videos, files, locations, and contacts; broadcast to up to 300 recipients; manage webhooks and inspect account/user state — 13 tools, fully typed, available on npm as @serhii.zghama/viber-mcp.
Category & Scope	Communication

Tools & Capabilities Breakdown

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).

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

{
  "mcpServers": {
    "serhiizghama-viber-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@serhii.zghama/viber-mcp"
      ]
    }
  }
}

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